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856 Commits

Author SHA1 Message Date
David Howells 34484277b1 Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h
Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h as all arch
files that #include the former also #include the latter.  See:

	grep -rl asm-generic/cmpxchg-local[.]h arch/ | sort > b
	grep -rl asm-generic/cmpxchg[.]h arch/ | sort > a
	comm a b

This simplifies the disintegration of asm-generic/system.h for arches that
don't have their own.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-03-28 18:30:03 +01:00
Chris Metcalf 1631fcea83 compat: use sys_sendfile64() implementation for sendfile syscall
<asm-generic/unistd.h> was set up to use sys_sendfile() for the 32-bit
compat API instead of sys_sendfile64(), but in fact the right thing to
do is to use sys_sendfile64() in all cases.  The 32-bit sendfile64() API
in glibc uses the sendfile64 syscall, so it has to be capable of doing
full 64-bit operations.  But the sys_sendfile() kernel implementation
has a MAX_NON_LFS test in it which explicitly limits the offset to 2^32.
So, we need to use the sys_sendfile64() implementation in the kernel
for this case.

Cc: <stable@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2012-03-27 13:36:57 -04:00
Pawel Moll 026cee0086 params: <level>_initcall-like kernel parameters
This patch adds a set of macros that can be used to declare
kernel parameters to be parsed _before_ initcalls at a chosen
level are executed.  We rename the now-unused "flags" field of
struct kernel_param as the level.  It's signed, for when we
use this for early params as well, in future.

Linker macro collating init calls had to be modified in order
to add additional symbols between levels that are later used
by the init code to split the calls into blocks.

Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-03-26 12:50:51 +10:30
Linus Torvalds ed2d265d12 The following text was taken from the original review request:
"[RFC - PATCH 0/7] consolidation of BUG support code."
 		https://lkml.org/lkml/2012/1/26/525
 --
 
 The changes shown here are to unify linux's BUG support under
 the one <linux/bug.h> file.  Due to historical reasons, we have
 some BUG code in bug.h and some in kernel.h -- i.e. the support for
 BUILD_BUG in linux/kernel.h predates the addition of linux/bug.h,
 but old code in kernel.h wasn't moved to bug.h at that time.  As
 a band-aid, kernel.h was including <asm/bug.h> to pseudo link them.
 
 This has caused confusion[1] and general yuck/WTF[2] reactions.
 Here is an example that violates the principle of least surprise:
 
       CC      lib/string.o
       lib/string.c: In function 'strlcat':
       lib/string.c:225:2: error: implicit declaration of function 'BUILD_BUG_ON'
       make[2]: *** [lib/string.o] Error 1
       $
       $ grep linux/bug.h lib/string.c
       #include <linux/bug.h>
       $
 
 We've included <linux/bug.h> for the BUG infrastructure and yet we
 still get a compile fail!  [We've not kernel.h for BUILD_BUG_ON.]
 Ugh - very confusing for someone who is new to kernel development.
 
 With the above in mind, the goals of this changeset are:
 
 1) find and fix any include/*.h files that were relying on the
    implicit presence of BUG code.
 2) find and fix any C files that were consuming kernel.h and
    hence relying on implicitly getting some/all BUG code.
 3) Move the BUG related code living in kernel.h to <linux/bug.h>
 4) remove the asm/bug.h from kernel.h to finally break the chain.
 
 During development, the order was more like 3-4, build-test, 1-2.
 But to ensure that git history for bisect doesn't get needless
 build failures introduced, the commits have been reorderd to fix
 the problem areas in advance.
 
 [1]  https://lkml.org/lkml/2012/1/3/90
 [2]  https://lkml.org/lkml/2012/1/17/414
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Merge tag 'bug-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

Pull <linux/bug.h> cleanup from Paul Gortmaker:
 "The changes shown here are to unify linux's BUG support under the one
  <linux/bug.h> file.  Due to historical reasons, we have some BUG code
  in bug.h and some in kernel.h -- i.e.  the support for BUILD_BUG in
  linux/kernel.h predates the addition of linux/bug.h, but old code in
  kernel.h wasn't moved to bug.h at that time.  As a band-aid, kernel.h
  was including <asm/bug.h> to pseudo link them.

  This has caused confusion[1] and general yuck/WTF[2] reactions.  Here
  is an example that violates the principle of least surprise:

      CC      lib/string.o
      lib/string.c: In function 'strlcat':
      lib/string.c:225:2: error: implicit declaration of function 'BUILD_BUG_ON'
      make[2]: *** [lib/string.o] Error 1
      $
      $ grep linux/bug.h lib/string.c
      #include <linux/bug.h>
      $

  We've included <linux/bug.h> for the BUG infrastructure and yet we
  still get a compile fail! [We've not kernel.h for BUILD_BUG_ON.] Ugh -
  very confusing for someone who is new to kernel development.

  With the above in mind, the goals of this changeset are:

  1) find and fix any include/*.h files that were relying on the
     implicit presence of BUG code.
  2) find and fix any C files that were consuming kernel.h and hence
     relying on implicitly getting some/all BUG code.
  3) Move the BUG related code living in kernel.h to <linux/bug.h>
  4) remove the asm/bug.h from kernel.h to finally break the chain.

  During development, the order was more like 3-4, build-test, 1-2.  But
  to ensure that git history for bisect doesn't get needless build
  failures introduced, the commits have been reorderd to fix the problem
  areas in advance.

	[1]  https://lkml.org/lkml/2012/1/3/90
	[2]  https://lkml.org/lkml/2012/1/17/414"

Fix up conflicts (new radeon file, reiserfs header cleanups) as per Paul
and linux-next.

* tag 'bug-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
  kernel.h: doesn't explicitly use bug.h, so don't include it.
  bug: consolidate BUILD_BUG_ON with other bug code
  BUG: headers with BUG/BUG_ON etc. need linux/bug.h
  bug.h: add include of it to various implicit C users
  lib: fix implicit users of kernel.h for TAINT_WARN
  spinlock: macroize assert_spin_locked to avoid bug.h dependency
  x86: relocate get/set debugreg fcns to include/asm/debugreg.
2012-03-24 10:08:39 -07:00
Linus Torvalds 8e3ade251b Merge branch 'akpm' (Andrew's patch-bomb)
Merge second batch of patches from Andrew Morton:
 - various misc things
 - core kernel changes to prctl, exit, exec, init, etc.
 - kernel/watchdog.c updates
 - get_maintainer
 - MAINTAINERS
 - the backlight driver queue
 - core bitops code cleanups
 - the led driver queue
 - some core prio_tree work
 - checkpatch udpates
 - largeish crc32 update
 - a new poll() feature for the v4l guys
 - the rtc driver queue
 - fatfs
 - ptrace
 - signals
 - kmod/usermodehelper updates
 - coredump
 - procfs updates

* emailed from Andrew Morton <akpm@linux-foundation.org>: (141 commits)
  seq_file: add seq_set_overflow(), seq_overflow()
  proc-ns: use d_set_d_op() API to set dentry ops in proc_ns_instantiate().
  procfs: speed up /proc/pid/stat, statm
  procfs: add num_to_str() to speed up /proc/stat
  proc: speed up /proc/stat handling
  fs/proc/kcore.c: make get_sparsemem_vmemmap_info() static
  coredump: add VM_NODUMP, MADV_NODUMP, MADV_CLEAR_NODUMP
  coredump: remove VM_ALWAYSDUMP flag
  kmod: make __request_module() killable
  kmod: introduce call_modprobe() helper
  usermodehelper: ____call_usermodehelper() doesn't need do_exit()
  usermodehelper: kill umh_wait, renumber UMH_* constants
  usermodehelper: implement UMH_KILLABLE
  usermodehelper: introduce umh_complete(sub_info)
  usermodehelper: use UMH_WAIT_PROC consistently
  signal: zap_pid_ns_processes: s/SEND_SIG_NOINFO/SEND_SIG_FORCED/
  signal: oom_kill_task: use SEND_SIG_FORCED instead of force_sig()
  signal: cosmetic, s/from_ancestor_ns/force/ in prepare_signal() paths
  signal: give SEND_SIG_FORCED more power to beat SIGNAL_UNKILLABLE
  Hexagon: use set_current_blocked() and block_sigmask()
  ...
2012-03-23 16:59:10 -07:00
Jason Baron accb61fe7b coredump: add VM_NODUMP, MADV_NODUMP, MADV_CLEAR_NODUMP
Since we no longer need the VM_ALWAYSDUMP flag, let's use the freed bit
for 'VM_NODUMP' flag.  The idea is is to add a new madvise() flag:
MADV_DONTDUMP, which can be set by applications to specifically request
memory regions which should not dump core.

The specific application I have in mind is qemu: we can add a flag there
that wouldn't dump all of guest memory when qemu dumps core.  This flag
might also be useful for security sensitive apps that want to absolutely
make sure that parts of memory are not dumped.  To clear the flag use:
MADV_DODUMP.

[akpm@linux-foundation.org: s/MADV_NODUMP/MADV_DONTDUMP/, s/MADV_CLEAR_NODUMP/MADV_DODUMP/, per Roland]
[akpm@linux-foundation.org: fix up the architectures which broke]
Signed-off-by: Jason Baron <jbaron@redhat.com>
Acked-by: Roland McGrath <roland@hack.frob.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-23 16:58:42 -07:00
Jan Beulich 7ccaba5314 consolidate WARN_...ONCE() static variables
Due to the alignment of following variables, these typically consume
more than just the single byte that 'bool' requires, and as there are a
few hundred instances, the cache pollution (not so much the waste of
memory) sums up.  Put these variables into their own section, outside of
any half way frequently used memory range.

Do the same also to the __warned variable of rcu_lockdep_assert().
(Don't, however, include the ones used by printk_once() and alike, as
they can potentially be hot.)

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-23 16:58:31 -07:00
Linus Torvalds 475c77edf8 Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci
Pull PCI changes (including maintainer change) from Jesse Barnes:
 "This pull has some good cleanups from Bjorn and Yinghai, as well as
  some more code from Yinghai to better handle resource re-allocation
  when enabled.

  There's also a new initcall_debug feature from Arjan which will print
  out quirk timing information to help identify slow quirks for fixing
  or refinement (Yinghai sent in a few patches to do just that once the
  new debug code landed).

  Beyond that, I'm handing off PCI maintainership to Bjorn Helgaas.
  He's been a core PCI and Linux contributor for some time now, and has
  kindly volunteered to take over.  I just don't feel I have the time
  for PCI review and work that it deserves lately (I've taken on some
  other projects), and haven't been as responsive lately as I'd like, so
  I approached Bjorn asking if he'd like to manage things.  He's going
  to give it a try, and I'm confident he'll do at least as well as I
  have in keeping the tree managed, patches flowing, and keeping things
  stable."

Fix up some fairly trivial conflicts due to other cleanups (mips device
resource fixup cleanups clashing with list handling cleanup, ppc iseries
removal clashing with pci_probe_only cleanup etc)

* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci: (112 commits)
  PCI: Bjorn gets PCI hotplug too
  PCI: hand PCI maintenance over to Bjorn Helgaas
  unicore32/PCI: move <asm-generic/pci-bridge.h> include to asm/pci.h
  sparc/PCI: convert devtree and arch-probed bus addresses to resource
  powerpc/PCI: allow reallocation on PA Semi
  powerpc/PCI: convert devtree bus addresses to resource
  powerpc/PCI: compute I/O space bus-to-resource offset consistently
  arm/PCI: don't export pci_flags
  PCI: fix bridge I/O window bus-to-resource conversion
  x86/PCI: add spinlock held check to 'pcibios_fwaddrmap_lookup()'
  PCI / PCIe: Introduce command line option to disable ARI
  PCI: make acpihp use __pci_remove_bus_device instead
  PCI: export __pci_remove_bus_device
  PCI: Rename pci_remove_behind_bridge to pci_stop_and_remove_behind_bridge
  PCI: Rename pci_remove_bus_device to pci_stop_and_remove_bus_device
  PCI: print out PCI device info along with duration
  PCI: Move "pci reassigndev resource alignment" out of quirks.c
  PCI: Use class for quirk for usb host controller fixup
  PCI: Use class for quirk for ti816x class fixup
  PCI: Use class for quirk for intel e100 interrupt fixup
  ...
2012-03-23 14:02:12 -07:00
Linus Torvalds e17fdf5c67 Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86/asm changes from Ingo Molnar

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Include probe_roms.h in probe_roms.c
  x86/32: Print control and debug registers for kerenel context
  x86: Tighten dependencies of CPU_SUP_*_32
  x86/numa: Improve internode cache alignment
  x86: Fix the NMI nesting comments
  x86-64: Improve insn scheduling in SAVE_ARGS_IRQ
  x86-64: Fix CFI annotations for NMI nesting code
  bitops: Add missing parentheses to new get_order macro
  bitops: Optimise get_order()
  bitops: Adjust the comment on get_order() to describe the size==0 case
  x86/spinlocks: Eliminate TICKET_MASK
  x86-64: Handle byte-wise tail copying in memcpy() without a loop
  x86-64: Fix memcpy() to support sizes of 4Gb and above
  x86-64: Fix memset() to support sizes of 4Gb and above
  x86-64: Slightly shorten copy_page()
2012-03-22 09:13:24 -07:00
Andrea Arcangeli 1a5a9906d4 mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode
In some cases it may happen that pmd_none_or_clear_bad() is called with
the mmap_sem hold in read mode.  In those cases the huge page faults can
allocate hugepmds under pmd_none_or_clear_bad() and that can trigger a
false positive from pmd_bad() that will not like to see a pmd
materializing as trans huge.

It's not khugepaged causing the problem, khugepaged holds the mmap_sem
in write mode (and all those sites must hold the mmap_sem in read mode
to prevent pagetables to go away from under them, during code review it
seems vm86 mode on 32bit kernels requires that too unless it's
restricted to 1 thread per process or UP builds).  The race is only with
the huge pagefaults that can convert a pmd_none() into a
pmd_trans_huge().

Effectively all these pmd_none_or_clear_bad() sites running with
mmap_sem in read mode are somewhat speculative with the page faults, and
the result is always undefined when they run simultaneously.  This is
probably why it wasn't common to run into this.  For example if the
madvise(MADV_DONTNEED) runs zap_page_range() shortly before the page
fault, the hugepage will not be zapped, if the page fault runs first it
will be zapped.

Altering pmd_bad() not to error out if it finds hugepmds won't be enough
to fix this, because zap_pmd_range would then proceed to call
zap_pte_range (which would be incorrect if the pmd become a
pmd_trans_huge()).

The simplest way to fix this is to read the pmd in the local stack
(regardless of what we read, no need of actual CPU barriers, only
compiler barrier needed), and be sure it is not changing under the code
that computes its value.  Even if the real pmd is changing under the
value we hold on the stack, we don't care.  If we actually end up in
zap_pte_range it means the pmd was not none already and it was not huge,
and it can't become huge from under us (khugepaged locking explained
above).

All we need is to enforce that there is no way anymore that in a code
path like below, pmd_trans_huge can be false, but pmd_none_or_clear_bad
can run into a hugepmd.  The overhead of a barrier() is just a compiler
tweak and should not be measurable (I only added it for THP builds).  I
don't exclude different compiler versions may have prevented the race
too by caching the value of *pmd on the stack (that hasn't been
verified, but it wouldn't be impossible considering
pmd_none_or_clear_bad, pmd_bad, pmd_trans_huge, pmd_none are all inlines
and there's no external function called in between pmd_trans_huge and
pmd_none_or_clear_bad).

		if (pmd_trans_huge(*pmd)) {
			if (next-addr != HPAGE_PMD_SIZE) {
				VM_BUG_ON(!rwsem_is_locked(&tlb->mm->mmap_sem));
				split_huge_page_pmd(vma->vm_mm, pmd);
			} else if (zap_huge_pmd(tlb, vma, pmd, addr))
				continue;
			/* fall through */
		}
		if (pmd_none_or_clear_bad(pmd))

Because this race condition could be exercised without special
privileges this was reported in CVE-2012-1179.

The race was identified and fully explained by Ulrich who debugged it.
I'm quoting his accurate explanation below, for reference.

====== start quote =======
      mapcount 0 page_mapcount 1
      kernel BUG at mm/huge_memory.c:1384!

    At some point prior to the panic, a "bad pmd ..." message similar to the
    following is logged on the console:

      mm/memory.c:145: bad pmd ffff8800376e1f98(80000000314000e7).

    The "bad pmd ..." message is logged by pmd_clear_bad() before it clears
    the page's PMD table entry.

        143 void pmd_clear_bad(pmd_t *pmd)
        144 {
    ->  145         pmd_ERROR(*pmd);
        146         pmd_clear(pmd);
        147 }

    After the PMD table entry has been cleared, there is an inconsistency
    between the actual number of PMD table entries that are mapping the page
    and the page's map count (_mapcount field in struct page). When the page
    is subsequently reclaimed, __split_huge_page() detects this inconsistency.

       1381         if (mapcount != page_mapcount(page))
       1382                 printk(KERN_ERR "mapcount %d page_mapcount %d\n",
       1383                        mapcount, page_mapcount(page));
    -> 1384         BUG_ON(mapcount != page_mapcount(page));

    The root cause of the problem is a race of two threads in a multithreaded
    process. Thread B incurs a page fault on a virtual address that has never
    been accessed (PMD entry is zero) while Thread A is executing an madvise()
    system call on a virtual address within the same 2 MB (huge page) range.

               virtual address space
              .---------------------.
              |                     |
              |                     |
            .-|---------------------|
            | |                     |
            | |                     |<-- B(fault)
            | |                     |
      2 MB  | |/////////////////////|-.
      huge <  |/////////////////////|  > A(range)
      page  | |/////////////////////|-'
            | |                     |
            | |                     |
            '-|---------------------|
              |                     |
              |                     |
              '---------------------'

    - Thread A is executing an madvise(..., MADV_DONTNEED) system call
      on the virtual address range "A(range)" shown in the picture.

    sys_madvise
      // Acquire the semaphore in shared mode.
      down_read(&current->mm->mmap_sem)
      ...
      madvise_vma
        switch (behavior)
        case MADV_DONTNEED:
             madvise_dontneed
               zap_page_range
                 unmap_vmas
                   unmap_page_range
                     zap_pud_range
                       zap_pmd_range
                         //
                         // Assume that this huge page has never been accessed.
                         // I.e. content of the PMD entry is zero (not mapped).
                         //
                         if (pmd_trans_huge(*pmd)) {
                             // We don't get here due to the above assumption.
                         }
                         //
                         // Assume that Thread B incurred a page fault and
             .---------> // sneaks in here as shown below.
             |           //
             |           if (pmd_none_or_clear_bad(pmd))
             |               {
             |                 if (unlikely(pmd_bad(*pmd)))
             |                     pmd_clear_bad
             |                     {
             |                       pmd_ERROR
             |                         // Log "bad pmd ..." message here.
             |                       pmd_clear
             |                         // Clear the page's PMD entry.
             |                         // Thread B incremented the map count
             |                         // in page_add_new_anon_rmap(), but
             |                         // now the page is no longer mapped
             |                         // by a PMD entry (-> inconsistency).
             |                     }
             |               }
             |
             v
    - Thread B is handling a page fault on virtual address "B(fault)" shown
      in the picture.

    ...
    do_page_fault
      __do_page_fault
        // Acquire the semaphore in shared mode.
        down_read_trylock(&mm->mmap_sem)
        ...
        handle_mm_fault
          if (pmd_none(*pmd) && transparent_hugepage_enabled(vma))
              // We get here due to the above assumption (PMD entry is zero).
              do_huge_pmd_anonymous_page
                alloc_hugepage_vma
                  // Allocate a new transparent huge page here.
                ...
                __do_huge_pmd_anonymous_page
                  ...
                  spin_lock(&mm->page_table_lock)
                  ...
                  page_add_new_anon_rmap
                    // Here we increment the page's map count (starts at -1).
                    atomic_set(&page->_mapcount, 0)
                  set_pmd_at
                    // Here we set the page's PMD entry which will be cleared
                    // when Thread A calls pmd_clear_bad().
                  ...
                  spin_unlock(&mm->page_table_lock)

    The mmap_sem does not prevent the race because both threads are acquiring
    it in shared mode (down_read).  Thread B holds the page_table_lock while
    the page's map count and PMD table entry are updated.  However, Thread A
    does not synchronize on that lock.

====== end quote =======

[akpm@linux-foundation.org: checkpatch fixes]
Reported-by: Ulrich Obergfell <uobergfe@redhat.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Dave Jones <davej@redhat.com>
Acked-by: Larry Woodman <lwoodman@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: <stable@vger.kernel.org>		[2.6.38+]
Cc: Mark Salter <msalter@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-21 17:54:54 -07:00
Grant Likely e2aa417726 Linux 3.3-rc7
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Merge tag 'v3.3-rc7' into gpio/next

Linux 3.3-rc7.  Merged into the gpio branch to pick up gpio bugfixes already
in mainline before queueing up move v3.4 patches
2012-03-12 09:41:28 -06:00
David S. Miller f6a1ad4295 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/vmxnet3/vmxnet3_drv.c

Small vmxnet3 conflict with header size bug fix in 'net'.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-05 21:16:26 -05:00
Paul Gortmaker 187f1882b5 BUG: headers with BUG/BUG_ON etc. need linux/bug.h
If a header file is making use of BUG, BUG_ON, BUILD_BUG_ON, or any
other BUG variant in a static inline (i.e. not in a #define) then
that header really should be including <linux/bug.h> and not just
expecting it to be implicitly present.

We can make this change risk-free, since if the files using these
headers didn't have exposure to linux/bug.h already, they would have
been causing compile failures/warnings.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2012-03-04 17:54:34 -05:00
Grant Likely 6e2cf65140 gpio: constify the data parameter to gpiochip_find()
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-03-02 15:56:03 -07:00
Ingo Molnar 458ce2910a Merge branch 'linus' into x86/asm
Sync up the latest NMI fixes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-02-28 10:27:36 +01:00
James Bottomley 97a29d59fc [PARISC] fix compile break caused by iomap: make IOPORT/PCI mapping functions conditional
The problem in

commit fea80311a9
Author: Randy Dunlap <rdunlap@xenotime.net>
Date:   Sun Jul 24 11:39:14 2011 -0700

    iomap: make IOPORT/PCI mapping functions conditional

is that if your architecture supplies pci_iomap/pci_iounmap, it expects
always to supply them.  Adding empty body defitions in the !CONFIG_PCI
case, which is what this patch does, breaks the parisc compile because
the functions become doubly defined.  It took us a while to spot this,
because we don't actually build !CONFIG_PCI very often (only if someone
is brave enough to test the snake/asp machines).

Since the note in the commit log says this is to fix a
CONFIG_GENERIC_IOMAP issue (which it does because CONFIG_GENERIC_IOMAP
supplies pci_iounmap only if CONFIG_PCI is set), there should actually
have been a condition upon this.  This should make sure no other
architecture's !CONFIG_PCI compile breaks in the same way as parisc.

The fix had to be updated to take account of the GENERIC_PCI_IOMAP
separation.

Reported-by: Rolf Eike Beer <eike@sf-mail.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-27 09:43:30 -06:00
David S. Miller ff4783ce78 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/ethernet/sfc/rx.c

Overlapping changes in drivers/net/ethernet/sfc/rx.c, one to change
the rx_buf->is_page boolean into a set of u16 flags, and another to
adjust how ->ip_summed is initialized.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-02-26 21:55:51 -05:00
Oleg Nesterov d80e731eca epoll: introduce POLLFREE to flush ->signalfd_wqh before kfree()
This patch is intentionally incomplete to simplify the review.
It ignores ep_unregister_pollwait() which plays with the same wqh.
See the next change.

epoll assumes that the EPOLL_CTL_ADD'ed file controls everything
f_op->poll() needs. In particular it assumes that the wait queue
can't go away until eventpoll_release(). This is not true in case
of signalfd, the task which does EPOLL_CTL_ADD uses its ->sighand
which is not connected to the file.

This patch adds the special event, POLLFREE, currently only for
epoll. It expects that init_poll_funcptr()'ed hook should do the
necessary cleanup. Perhaps it should be defined as EPOLLFREE in
eventpoll.

__cleanup_sighand() is changed to do wake_up_poll(POLLFREE) if
->signalfd_wqh is not empty, we add the new signalfd_cleanup()
helper.

ep_poll_callback(POLLFREE) simply does list_del_init(task_list).
This make this poll entry inconsistent, but we don't care. If you
share epoll fd which contains our sigfd with another process you
should blame yourself. signalfd is "really special". I simply do
not know how we can define the "right" semantics if it used with
epoll.

The main problem is, epoll calls signalfd_poll() once to establish
the connection with the wait queue, after that signalfd_poll(NULL)
returns the different/inconsistent results depending on who does
EPOLL_CTL_MOD/signalfd_read/etc. IOW: apart from sigmask, signalfd
has nothing to do with the file, it works with the current thread.

In short: this patch is the hack which tries to fix the symptoms.
It also assumes that nobody can take tasklist_lock under epoll
locks, this seems to be true.

Note:

	- we do not have wake_up_all_poll() but wake_up_poll()
	  is fine, poll/epoll doesn't use WQ_FLAG_EXCLUSIVE.

	- signalfd_cleanup() uses POLLHUP along with POLLFREE,
	  we need a couple of simple changes in eventpoll.c to
	  make sure it can't be "lost".

Reported-by: Maxime Bizon <mbizon@freebox.fr>
Cc: <stable@kernel.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-02-24 11:42:50 -08:00
Joerg Roedel b893485db9 bitops: Add missing parentheses to new get_order macro
The new get_order macro introcuded in commit

	d66acc39c7

does not use parentheses around all uses of the parameter n.
This causes new compile warnings, for example in the
amd_iommu_init.c function:

drivers/iommu/amd_iommu_init.c:561:6: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
drivers/iommu/amd_iommu_init.c:561:6: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]

Fix those warnings by adding the missing parentheses.

Reported-by: Ingo Molnar <mingo@elte.hu>
Cc: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Link: http://lkml.kernel.org/r/1330088295-28732-1-git-send-email-joerg.roedel@amd.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-02-24 10:39:27 -08:00
Ben Greear 3bdc0eba0b net: Add framework to allow sending packets with customized CRC.
This is useful for testing RX handling of frames with bad
CRCs.

Requires driver support to actually put the packet on the
wire properly.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2012-02-24 01:37:35 -08:00
Bjorn Helgaas fb127cb9de PCI: collapse pcibios_resource_to_bus
Everybody uses the generic pcibios_resource_to_bus() supplied by the core
now, so remove the ARCH_HAS_GENERIC_PCI_OFFSETS used during conversion.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-02-23 20:19:04 -07:00
Bjorn Helgaas 36a66cd6fd PCI: add generic pcibios_resource_to_bus()
This replaces the generic versions of pcibios_resource_to_bus() and
pcibios_bus_to_resource() in asm-generic/pci.h with versions that use
pci_resource_to_bus() and pci_bus_to_resource().

The replacements are equivalent except that they can apply host
bridge window offsets when the arch has supplied them by using
pci_add_resource_offset().

Each arch can convert to using pci_add_resource_offset() individually by
removing its device resource fixups from pcibios_fixup_bus() and supplying
ARCH_HAS_GENERIC_PCI_OFFSETS.  ARCH_HAS_GENERIC_PCI_OFFSETS can be removed
after all have converted.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-02-23 20:19:00 -07:00
Bjorn Helgaas dcce6dc486 PCI: add pci_clear_flags()
Add a pci_clear_flags() for cases when we statically initialize
pci_flags, then decide to clear things out later.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-02-23 20:18:56 -07:00
Hitoshi Mitake 797a796a13 asm-generic: architecture independent readq/writeq for 32bit environment
This provides unified readq()/writeq() helper functions for 32-bit
drivers.

For some cases, readq/writeq without atomicity is harmful, and order of
io access has to be specified explicitly.  So in this patch, new two
header files which contain non-atomic readq/writeq are added.

 - <asm-generic/io-64-nonatomic-lo-hi.h> provides non-atomic readq/
   writeq with the order of lower address -> higher address

 - <asm-generic/io-64-nonatomic-hi-lo.h> provides non-atomic readq/
   writeq with reversed order

This allows us to remove some readq()s that were added drivers when the
default non-atomic ones were removed in commit dbee8a0aff ("x86:
remove 32-bit versions of readq()/writeq()")

The drivers which need readq/writeq but can do with the non-atomic ones
must add the line:

  #include <asm-generic/io-64-nonatomic-lo-hi.h> /* or hi-lo.h */

But this will be nop in 64-bit environments, and no other #ifdefs are
required.  So I believe that this patch can solve the problem of
 1. driver-specific readq/writeq
 2. atomicity and order of io access

This patch is tested with building allyesconfig and allmodconfig as
ARCH=x86 and ARCH=i386 on top of tip/master.

Cc: Kashyap Desai <Kashyap.Desai@lsi.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Ravi Anand <ravi.anand@qlogic.com>
Cc: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Jason Uhlenkott <juhlenko@akamai.com>
Cc: James Bottomley <James.Bottomley@parallels.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Roland Dreier <roland@purestorage.com>
Cc: James Bottomley <jbottomley@parallels.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Hitoshi Mitake <h.mitake@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-02-21 16:47:28 -08:00
Pavel Emelyanov ef64a54f6e sock: Introduce the SO_PEEK_OFF sock option
This one specifies where to start MSG_PEEK-ing queue data from. When
set to negative value means that MSG_PEEK works as ususally -- peeks
from the head of the queue always.

When some bytes are peeked from queue and the peeking offset is non
negative it is moved forward so that the next peek will return next
portion of data.

When non-peeking recvmsg occurs and the peeking offset is non negative
is is moved backward so that the next peek will still peek the proper
data (i.e. the one that would have been picked if there were no non
peeking recv in between).

The offset is set using per-proto opteration to let the protocol handle
the locking issues and to check whether the peeking offset feature is
supported by the protocol the socket belongs to.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-02-21 15:03:48 -05:00
David Howells d66acc39c7 bitops: Optimise get_order()
Optimise get_order() to use bit scanning instructions if such exist rather than
a loop.  Also, make it possible to use get_order() in static initialisations
too by building it on top of ilog2() in the constant parameter case.

This has been tested for i386 and x86_64 using the following userspace program,
and for FRV by making appropriate substitutions for fls() and fls64().  It will
abort if the case for get_order() deviates from the original except for the
order of 0, for which get_order() produces an undefined result.  This program
tests both dynamic and static parameters.

	#include <stdlib.h>
	#include <stdio.h>

	#ifdef __x86_64__
	#define BITS_PER_LONG 64
	#else
	#define BITS_PER_LONG 32
	#endif

	#define PAGE_SHIFT 12

	typedef unsigned long long __u64, u64;
	typedef unsigned int __u32, u32;
	#define noinline	__attribute__((noinline))

	static inline int fls(int x)
	{
		int bitpos = -1;

		asm("bsrl %1,%0"
		    : "+r" (bitpos)
		    : "rm" (x));
		return bitpos + 1;
	}

	static __always_inline int fls64(__u64 x)
	{
	#if BITS_PER_LONG == 64
		long bitpos = -1;

		asm("bsrq %1,%0"
		    : "+r" (bitpos)
		    : "rm" (x));
		return bitpos + 1;
	#else
		__u32 h = x >> 32, l = x;
		int bitpos = -1;

		asm("bsrl	%1,%0	\n"
		    "subl	%2,%0	\n"
		    "bsrl	%3,%0	\n"
		    : "+r" (bitpos)
		    : "rm" (l), "i"(32), "rm" (h));

		return bitpos + 33;
	#endif
	}

	static inline __attribute__((const))
	int __ilog2_u32(u32 n)
	{
		return fls(n) - 1;
	}

	static inline __attribute__((const))
	int __ilog2_u64(u64 n)
	{
		return fls64(n) - 1;
	}

	extern __attribute__((const, noreturn))
	int ____ilog2_NaN(void);

	#define ilog2(n)				\
	(						\
		__builtin_constant_p(n) ? (		\
			(n) < 1 ? ____ilog2_NaN() :	\
			(n) & (1ULL << 63) ? 63 :	\
			(n) & (1ULL << 62) ? 62 :	\
			(n) & (1ULL << 61) ? 61 :	\
			(n) & (1ULL << 60) ? 60 :	\
			(n) & (1ULL << 59) ? 59 :	\
			(n) & (1ULL << 58) ? 58 :	\
			(n) & (1ULL << 57) ? 57 :	\
			(n) & (1ULL << 56) ? 56 :	\
			(n) & (1ULL << 55) ? 55 :	\
			(n) & (1ULL << 54) ? 54 :	\
			(n) & (1ULL << 53) ? 53 :	\
			(n) & (1ULL << 52) ? 52 :	\
			(n) & (1ULL << 51) ? 51 :	\
			(n) & (1ULL << 50) ? 50 :	\
			(n) & (1ULL << 49) ? 49 :	\
			(n) & (1ULL << 48) ? 48 :	\
			(n) & (1ULL << 47) ? 47 :	\
			(n) & (1ULL << 46) ? 46 :	\
			(n) & (1ULL << 45) ? 45 :	\
			(n) & (1ULL << 44) ? 44 :	\
			(n) & (1ULL << 43) ? 43 :	\
			(n) & (1ULL << 42) ? 42 :	\
			(n) & (1ULL << 41) ? 41 :	\
			(n) & (1ULL << 40) ? 40 :	\
			(n) & (1ULL << 39) ? 39 :	\
			(n) & (1ULL << 38) ? 38 :	\
			(n) & (1ULL << 37) ? 37 :	\
			(n) & (1ULL << 36) ? 36 :	\
			(n) & (1ULL << 35) ? 35 :	\
			(n) & (1ULL << 34) ? 34 :	\
			(n) & (1ULL << 33) ? 33 :	\
			(n) & (1ULL << 32) ? 32 :	\
			(n) & (1ULL << 31) ? 31 :	\
			(n) & (1ULL << 30) ? 30 :	\
			(n) & (1ULL << 29) ? 29 :	\
			(n) & (1ULL << 28) ? 28 :	\
			(n) & (1ULL << 27) ? 27 :	\
			(n) & (1ULL << 26) ? 26 :	\
			(n) & (1ULL << 25) ? 25 :	\
			(n) & (1ULL << 24) ? 24 :	\
			(n) & (1ULL << 23) ? 23 :	\
			(n) & (1ULL << 22) ? 22 :	\
			(n) & (1ULL << 21) ? 21 :	\
			(n) & (1ULL << 20) ? 20 :	\
			(n) & (1ULL << 19) ? 19 :	\
			(n) & (1ULL << 18) ? 18 :	\
			(n) & (1ULL << 17) ? 17 :	\
			(n) & (1ULL << 16) ? 16 :	\
			(n) & (1ULL << 15) ? 15 :	\
			(n) & (1ULL << 14) ? 14 :	\
			(n) & (1ULL << 13) ? 13 :	\
			(n) & (1ULL << 12) ? 12 :	\
			(n) & (1ULL << 11) ? 11 :	\
			(n) & (1ULL << 10) ? 10 :	\
			(n) & (1ULL <<  9) ?  9 :	\
			(n) & (1ULL <<  8) ?  8 :	\
			(n) & (1ULL <<  7) ?  7 :	\
			(n) & (1ULL <<  6) ?  6 :	\
			(n) & (1ULL <<  5) ?  5 :	\
			(n) & (1ULL <<  4) ?  4 :	\
			(n) & (1ULL <<  3) ?  3 :	\
			(n) & (1ULL <<  2) ?  2 :	\
			(n) & (1ULL <<  1) ?  1 :	\
			(n) & (1ULL <<  0) ?  0 :	\
			____ilog2_NaN()			\
					   ) :		\
		(sizeof(n) <= 4) ?			\
		__ilog2_u32(n) :			\
		__ilog2_u64(n)				\
	 )

	static noinline __attribute__((const))
	int old_get_order(unsigned long size)
	{
		int order;

		size = (size - 1) >> (PAGE_SHIFT - 1);
		order = -1;
		do {
			size >>= 1;
			order++;
		} while (size);
		return order;
	}

	static noinline __attribute__((const))
	int __get_order(unsigned long size)
	{
		int order;
		size--;
		size >>= PAGE_SHIFT;
	#if BITS_PER_LONG == 32
		order = fls(size);
	#else
		order = fls64(size);
	#endif
		return order;
	}

	#define get_order(n)						\
	(								\
		__builtin_constant_p(n) ? (				\
			(n == 0UL) ? BITS_PER_LONG - PAGE_SHIFT :	\
			((n < (1UL << PAGE_SHIFT)) ? 0 :		\
			 ilog2((n) - 1) - PAGE_SHIFT + 1)		\
		) :							\
		__get_order(n)						\
	)

	#define order(N) \
		{ (1UL << N) - 1,	get_order((1UL << N) - 1)	},	\
		{ (1UL << N),		get_order((1UL << N))		},	\
		{ (1UL << N) + 1,	get_order((1UL << N) + 1)	}

	struct order {
		unsigned long n, order;
	};

	static const struct order order_table[] = {
		order(0),
		order(1),
		order(2),
		order(3),
		order(4),
		order(5),
		order(6),
		order(7),
		order(8),
		order(9),
		order(10),
		order(11),
		order(12),
		order(13),
		order(14),
		order(15),
		order(16),
		order(17),
		order(18),
		order(19),
		order(20),
		order(21),
		order(22),
		order(23),
		order(24),
		order(25),
		order(26),
		order(27),
		order(28),
		order(29),
		order(30),
		order(31),
	#if BITS_PER_LONG == 64
		order(32),
		order(33),
		order(34),
		order(35),
	#endif
		{ 0x2929 }
	};

	void check(int loop, unsigned long n)
	{
		unsigned long old, new;

		printf("[%2d]: %09lx | ", loop, n);

		old = old_get_order(n);
		new = get_order(n);

		printf("%3ld, %3ld\n", old, new);
		if (n != 0 && old != new)
			abort();
	}

	int main(int argc, char **argv)
	{
		const struct order *p;
		unsigned long n;
		int loop;

		for (loop = 0; loop <= BITS_PER_LONG - 1; loop++) {
			n = 1UL << loop;
			check(loop, n - 1);
			check(loop, n);
			check(loop, n + 1);
		}

		for (p = order_table; p->n != 0x2929; p++) {
			unsigned long old, new;

			old = old_get_order(p->n);
			new = p->order;
			printf("%09lx\t%3ld, %3ld\n", p->n, old, new);
			if (p->n != 0 && old != new)
				abort();
		}

		return 0;
	}

Disassembling the x86_64 version of the above code shows:

	0000000000400510 <old_get_order>:
	  400510:       48 83 ef 01             sub    $0x1,%rdi
	  400514:       b8 ff ff ff ff          mov    $0xffffffff,%eax
	  400519:       48 c1 ef 0b             shr    $0xb,%rdi
	  40051d:       0f 1f 00                nopl   (%rax)
	  400520:       83 c0 01                add    $0x1,%eax
	  400523:       48 d1 ef                shr    %rdi
	  400526:       75 f8                   jne    400520 <old_get_order+0x10>
	  400528:       f3 c3                   repz retq
	  40052a:       66 0f 1f 44 00 00       nopw   0x0(%rax,%rax,1)

	0000000000400530 <__get_order>:
	  400530:       48 83 ef 01             sub    $0x1,%rdi
	  400534:       48 c7 c0 ff ff ff ff    mov    $0xffffffffffffffff,%rax
	  40053b:       48 c1 ef 0c             shr    $0xc,%rdi
	  40053f:       48 0f bd c7             bsr    %rdi,%rax
	  400543:       83 c0 01                add    $0x1,%eax
	  400546:       c3                      retq
	  400547:       66 0f 1f 84 00 00 00    nopw   0x0(%rax,%rax,1)
	  40054e:       00 00

As can be seen, the new __get_order() function is simpler than the
old_get_order() function.

Signed-off-by: David Howells <dhowells@redhat.com>
Link: http://lkml.kernel.org/r/20120220223928.16199.29548.stgit@warthog.procyon.org.uk
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-02-20 14:47:02 -08:00
David Howells e0891a9816 bitops: Adjust the comment on get_order() to describe the size==0 case
Adjust the comment on get_order() to note that the result of passing a size of
0 results in an undefined value.

Signed-off-by: David Howells <dhowells@redhat.com>
Link: http://lkml.kernel.org/r/20120220223917.16199.9416.stgit@warthog.procyon.org.uk
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-02-20 14:46:55 -08:00
H. Peter Anvin afead38d01 posix_types: Introduce __kernel_[u]long_t
Introduce __kernel_[u]long_t, which allows an ABI to override all
defaults of type [unsigned] long.

This enables x32 and potentially other 32-bit userspace on 64-bit
kernel ABIs.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2012-02-20 12:48:47 -08:00
H. Peter Anvin 8b3d1cda4f posix_types: Remove fd_set macros
<asm/posix_types.h> includes a set of macros that operate on file
descriptors.  Way long ago those were exported to user space, but
nowadays they are #ifdef __KERNEL__.

However, they are nothing but standard (nonatomic) bit operations, and
we already have optimized versions of bit operations in the kernel.
We can't include <linux/bitops.h> in <asm/posix_types.h> but we can
move the definitions to <linux/time.h> and define them there in terms
of standard kernel bitops.

[ v2: folds the following fixes in:

  a) Stray space in __FD_SET(), reported by Andrew Morton
  b) #include <linux/string.h> needed for memset(), reported by Tony Luck ]

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Link: http://lkml.kernel.org/r/1328677745-20121-22-git-send-email-hpa@zytor.com
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
2012-02-14 12:47:21 -08:00
H. Peter Anvin 34e6f9e9f9 posix_types: Make it possible to override __kernel_fsid_t
__kernel_fsid_t has members of type "long" on at least one
architecture (MIPS32), so make it possible to override the definition.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Link: http://lkml.kernel.org/r/1328677745-20121-3-git-send-email-hpa@zytor.com
Cc: Arnd Bergmann <arnd@arndb.de>
2012-02-14 12:01:27 -08:00
H. Peter Anvin b4255ba3fb posix_types: Make __kernel_[ug]id32_t default to unsigned int
All ports use unsigned int for __kernel_[ug]id32_t, but not all ports
use unsigned int for __kernel_[ug]id_t.  Thus, change the default for
the "32" types so ports don't need to override them.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Link: http://lkml.kernel.org/r/1328677745-20121-2-git-send-email-hpa@zytor.com
Cc: Arnd Bergmann <arnd@arndb.de>
2012-02-14 12:01:27 -08:00
Michael S. Tsirkin b923650b84 lib: add NO_GENERIC_PCI_IOPORT_MAP
Some architectures need to override the way
IO port mapping is done on PCI devices.
Supply a generic macro that calls
ioport_map, and make it possible for architectures
to override.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-01-31 23:19:47 +02:00
Linus Torvalds dca88ad691 Merge branch 'for-next' of git://git.infradead.org/users/dhowells/linux-headers
* 'for-next' of git://git.infradead.org/users/dhowells/linux-headers:
  UAPI: Split trivial #if defined(__KERNEL__) && X conditionals
  UAPI: Don't have a #elif clause in a __KERNEL__ guard in linux/soundcard.h
  UAPI: Fix AHZ multiple inclusion when __KERNEL__ is removed
  UAPI: Make linux/patchkey.h easier to parse
  UAPI: Fix nested __KERNEL__ guards in video/edid.h
  UAPI: Alter the S390 asm include guards to be recognisable by the UAPI splitter
  UAPI: Guard linux/cuda.h
  UAPI: Guard linux/pmu.h
  UAPI: Guard linux/isdn_divertif.h
  UAPI: Guard linux/sound.h
  UAPI: Rearrange definition of HZ in asm-generic/param.h
  UAPI: Make FRV use asm-generic/param.h
  UAPI: Make M32R use asm-generic/param.h
  UAPI: Make MN10300 use asm-generic/param.h
  UAPI: elf_read_implies_exec() is a kernel-only feature - so hide from userspace
  UAPI: Don't include linux/compat.h in sparc's asm/siginfo.h
  UAPI: Fix arch/mips/include/asm/Kbuild to have separate header-y lines
2012-01-14 18:03:30 -08:00
Linus Torvalds f5e4e20faa 2nd round of GPIO changes for v3.3 merge window
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Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6

2nd round of GPIO changes for v3.3 merge window

* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6:
  GPIO: sa1100: implement proper gpiolib gpio_to_irq conversion
  gpio: pl061: remove combined interrupt
  gpio: pl061: convert to use generic irq chip
  GPIO: add bindings for managed devices
  ARM: realview: convert pl061 no irq to 0 instead of -1
  gpio: pl061: convert to use 0 for no irq
  gpio: pl061: use chained_irq_* functions in irq handler
  GPIO/pl061: Add suspend resume capability
  drivers/gpio/gpio-tegra.c: use devm_request_and_ioremap
2012-01-14 13:25:23 -08:00
Shaohua Li f21760b15d thp: add tlb_remove_pmd_tlb_entry
We have tlb_remove_tlb_entry to indicate a pte tlb flush entry should be
flushed, but not a corresponding API for pmd entry.  This isn't a
problem so far because THP is only for x86 currently and tlb_flush()
under x86 will flush entire TLB.  But this is confusion and could be
missed if thp is ported to other arch.

Also convert tlb->need_flush = 1 to a VM_BUG_ON(!tlb->need_flush) in
__tlb_remove_page() as suggested by Andrea Arcangeli.  The
__tlb_remove_page() function is supposed to be called after
tlb_remove_xxx_tlb_entry() and we can catch any misuse.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-01-12 20:13:08 -08:00
Linus Torvalds e343a895a9 lib: use generic pci_iomap on all architectures
Many architectures don't want to pull in iomap.c,
 so they ended up duplicating pci_iomap from that file.
 That function isn't trivial, and we are going to modify it
 https://lkml.org/lkml/2011/11/14/183
 so the duplication hurts.
 
 This reduces the scope of the problem significantly,
 by moving pci_iomap to a separate file and
 referencing that from all architectures.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

lib: use generic pci_iomap on all architectures

Many architectures don't want to pull in iomap.c,
so they ended up duplicating pci_iomap from that file.
That function isn't trivial, and we are going to modify it
https://lkml.org/lkml/2011/11/14/183
so the duplication hurts.

This reduces the scope of the problem significantly,
by moving pci_iomap to a separate file and
referencing that from all architectures.

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  alpha: drop pci_iomap/pci_iounmap from pci-noop.c
  mn10300: switch to GENERIC_PCI_IOMAP
  mn10300: add missing __iomap markers
  frv: switch to GENERIC_PCI_IOMAP
  tile: switch to GENERIC_PCI_IOMAP
  tile: don't panic on iomap
  sparc: switch to GENERIC_PCI_IOMAP
  sh: switch to GENERIC_PCI_IOMAP
  powerpc: switch to GENERIC_PCI_IOMAP
  parisc: switch to GENERIC_PCI_IOMAP
  mips: switch to GENERIC_PCI_IOMAP
  microblaze: switch to GENERIC_PCI_IOMAP
  arm: switch to GENERIC_PCI_IOMAP
  alpha: switch to GENERIC_PCI_IOMAP
  lib: add GENERIC_PCI_IOMAP
  lib: move GENERIC_IOMAP to lib/Kconfig

Fix up trivial conflicts due to changes nearby in arch/{m68k,score}/Kconfig
2012-01-10 18:04:27 -08:00
Linus Torvalds 06792c4dde The following changes since commit 3ee72ca992
are available in the git repository:
 
     git://linux-c6x.org/git/projects/linux-c6x-upstreaming.git for-linux-next
 
  Documentation/devicetree/bindings/c6x/clocks.txt   |   40 +
  Documentation/devicetree/bindings/c6x/dscr.txt     |  127 +++
  Documentation/devicetree/bindings/c6x/emifa.txt    |   62 ++
  .../devicetree/bindings/c6x/interrupt.txt          |  104 +++
  Documentation/devicetree/bindings/c6x/soc.txt      |   28 +
  Documentation/devicetree/bindings/c6x/timer64.txt  |   26 +
  MAINTAINERS                                        |    8 +
  arch/c6x/Kconfig                                   |  174 +++++
  arch/c6x/Makefile                                  |   60 ++
  arch/c6x/boot/Makefile                             |   30 +
  arch/c6x/boot/dts/dsk6455.dts                      |   62 ++
  arch/c6x/boot/dts/evmc6457.dts                     |   48 ++
  arch/c6x/boot/dts/evmc6472.dts                     |   73 ++
  arch/c6x/boot/dts/evmc6474.dts                     |   58 ++
  arch/c6x/boot/dts/tms320c6455.dtsi                 |   96 +++
  arch/c6x/boot/dts/tms320c6457.dtsi                 |   68 ++
  arch/c6x/boot/dts/tms320c6472.dtsi                 |  134 ++++
  arch/c6x/boot/dts/tms320c6474.dtsi                 |   89 +++
  arch/c6x/boot/linked_dtb.S                         |    2 +
  arch/c6x/configs/dsk6455_defconfig                 |   44 ++
  arch/c6x/configs/evmc6457_defconfig                |   41 +
  arch/c6x/configs/evmc6472_defconfig                |   42 +
  arch/c6x/configs/evmc6474_defconfig                |   42 +
  arch/c6x/include/asm/Kbuild                        |   54 ++
  arch/c6x/include/asm/asm-offsets.h                 |    1 +
  arch/c6x/include/asm/bitops.h                      |  105 +++
  arch/c6x/include/asm/byteorder.h                   |   12 +
  arch/c6x/include/asm/cache.h                       |   90 +++
  arch/c6x/include/asm/cacheflush.h                  |   65 ++
  arch/c6x/include/asm/checksum.h                    |   34 +
  arch/c6x/include/asm/clkdev.h                      |   22 +
  arch/c6x/include/asm/clock.h                       |  148 ++++
  arch/c6x/include/asm/delay.h                       |   67 ++
  arch/c6x/include/asm/dma-mapping.h                 |   91 +++
  arch/c6x/include/asm/dscr.h                        |   34 +
  arch/c6x/include/asm/elf.h                         |  113 +++
  arch/c6x/include/asm/ftrace.h                      |    6 +
  arch/c6x/include/asm/hardirq.h                     |   20 +
  arch/c6x/include/asm/irq.h                         |  302 ++++++++
  arch/c6x/include/asm/irqflags.h                    |   72 ++
  arch/c6x/include/asm/linkage.h                     |   30 +
  arch/c6x/include/asm/megamod-pic.h                 |    9 +
  arch/c6x/include/asm/mmu.h                         |   18 +
  arch/c6x/include/asm/module.h                      |   33 +
  arch/c6x/include/asm/mutex.h                       |    6 +
  arch/c6x/include/asm/page.h                        |   11 +
  arch/c6x/include/asm/pgtable.h                     |   81 ++
  arch/c6x/include/asm/processor.h                   |  132 ++++
  arch/c6x/include/asm/procinfo.h                    |   28 +
  arch/c6x/include/asm/prom.h                        |    1 +
  arch/c6x/include/asm/ptrace.h                      |  174 +++++
  arch/c6x/include/asm/sections.h                    |   12 +
  arch/c6x/include/asm/setup.h                       |   32 +
  arch/c6x/include/asm/sigcontext.h                  |   80 ++
  arch/c6x/include/asm/signal.h                      |   17 +
  arch/c6x/include/asm/soc.h                         |   35 +
  arch/c6x/include/asm/string.h                      |   21 +
  arch/c6x/include/asm/swab.h                        |   54 ++
  arch/c6x/include/asm/syscall.h                     |  123 +++
  arch/c6x/include/asm/syscalls.h                    |   55 ++
  arch/c6x/include/asm/system.h                      |  168 ++++
  arch/c6x/include/asm/thread_info.h                 |  121 +++
  arch/c6x/include/asm/timer64.h                     |    6 +
  arch/c6x/include/asm/timex.h                       |   33 +
  arch/c6x/include/asm/tlb.h                         |    8 +
  arch/c6x/include/asm/traps.h                       |   36 +
  arch/c6x/include/asm/uaccess.h                     |  107 +++
  arch/c6x/include/asm/unaligned.h                   |  170 +++++
  arch/c6x/include/asm/unistd.h                      |   26 +
  arch/c6x/kernel/Makefile                           |   12 +
  arch/c6x/kernel/asm-offsets.c                      |  123 +++
  arch/c6x/kernel/c6x_ksyms.c                        |   66 ++
  arch/c6x/kernel/devicetree.c                       |   53 ++
  arch/c6x/kernel/dma.c                              |  153 ++++
  arch/c6x/kernel/entry.S                            |  803 ++++++++++++++++++++
  arch/c6x/kernel/head.S                             |   84 ++
  arch/c6x/kernel/irq.c                              |  728 ++++++++++++++++++
  arch/c6x/kernel/module.c                           |  123 +++
  arch/c6x/kernel/process.c                          |  265 +++++++
  arch/c6x/kernel/ptrace.c                           |  187 +++++
  arch/c6x/kernel/setup.c                            |  510 +++++++++++++
  arch/c6x/kernel/signal.c                           |  377 +++++++++
  arch/c6x/kernel/soc.c                              |   91 +++
  arch/c6x/kernel/switch_to.S                        |   74 ++
  arch/c6x/kernel/sys_c6x.c                          |   74 ++
  arch/c6x/kernel/time.c                             |   65 ++
  arch/c6x/kernel/traps.c                            |  423 ++++++++++
  arch/c6x/kernel/vectors.S                          |   81 ++
  arch/c6x/kernel/vmlinux.lds.S                      |  162 ++++
  arch/c6x/lib/Makefile                              |    7 +
  arch/c6x/lib/checksum.c                            |   36 +
  arch/c6x/lib/csum_64plus.S                         |  419 ++++++++++
  arch/c6x/lib/divi.S                                |   53 ++
  arch/c6x/lib/divremi.S                             |   46 ++
  arch/c6x/lib/divremu.S                             |   87 +++
  arch/c6x/lib/divu.S                                |   98 +++
  arch/c6x/lib/llshl.S                               |   37 +
  arch/c6x/lib/llshr.S                               |   38 +
  arch/c6x/lib/llshru.S                              |   38 +
  arch/c6x/lib/memcpy_64plus.S                       |   46 ++
  arch/c6x/lib/mpyll.S                               |   49 ++
  arch/c6x/lib/negll.S                               |   31 +
  arch/c6x/lib/pop_rts.S                             |   32 +
  arch/c6x/lib/push_rts.S                            |   31 +
  arch/c6x/lib/remi.S                                |   64 ++
  arch/c6x/lib/remu.S                                |   82 ++
  arch/c6x/lib/strasgi.S                             |   89 +++
  arch/c6x/lib/strasgi_64plus.S                      |   39 +
  arch/c6x/mm/Makefile                               |    5 +
  arch/c6x/mm/dma-coherent.c                         |  143 ++++
  arch/c6x/mm/init.c                                 |  113 +++
  arch/c6x/platforms/Kconfig                         |   16 +
  arch/c6x/platforms/Makefile                        |   12 +
  arch/c6x/platforms/cache.c                         |  445 +++++++++++
  arch/c6x/platforms/dscr.c                          |  598 +++++++++++++++
  arch/c6x/platforms/emif.c                          |   87 +++
  arch/c6x/platforms/megamod-pic.c                   |  349 +++++++++
  arch/c6x/platforms/platform.c                      |   17 +
  arch/c6x/platforms/pll.c                           |  444 +++++++++++
  arch/c6x/platforms/plldata.c                       |  404 ++++++++++
  arch/c6x/platforms/timer64.c                       |  244 ++++++
  include/asm-generic/io.h                           |    2 +-
  include/asm-generic/page.h                         |   10 +-
  include/asm-generic/uaccess.h                      |    7 +-
  include/linux/elf-em.h                             |    1 +
  125 files changed, 12989 insertions(+), 5 deletions(-)
  create mode 100644 Documentation/devicetree/bindings/c6x/clocks.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/dscr.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/emifa.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/interrupt.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/soc.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/timer64.txt
  create mode 100644 arch/c6x/Kconfig
  create mode 100644 arch/c6x/Makefile
  create mode 100644 arch/c6x/boot/Makefile
  create mode 100644 arch/c6x/boot/dts/dsk6455.dts
  create mode 100644 arch/c6x/boot/dts/evmc6457.dts
  create mode 100644 arch/c6x/boot/dts/evmc6472.dts
  create mode 100644 arch/c6x/boot/dts/evmc6474.dts
  create mode 100644 arch/c6x/boot/dts/tms320c6455.dtsi
  create mode 100644 arch/c6x/boot/dts/tms320c6457.dtsi
  create mode 100644 arch/c6x/boot/dts/tms320c6472.dtsi
  create mode 100644 arch/c6x/boot/dts/tms320c6474.dtsi
  create mode 100644 arch/c6x/boot/linked_dtb.S
  create mode 100644 arch/c6x/configs/dsk6455_defconfig
  create mode 100644 arch/c6x/configs/evmc6457_defconfig
  create mode 100644 arch/c6x/configs/evmc6472_defconfig
  create mode 100644 arch/c6x/configs/evmc6474_defconfig
  create mode 100644 arch/c6x/include/asm/Kbuild
  create mode 100644 arch/c6x/include/asm/asm-offsets.h
  create mode 100644 arch/c6x/include/asm/bitops.h
  create mode 100644 arch/c6x/include/asm/byteorder.h
  create mode 100644 arch/c6x/include/asm/cache.h
  create mode 100644 arch/c6x/include/asm/cacheflush.h
  create mode 100644 arch/c6x/include/asm/checksum.h
  create mode 100644 arch/c6x/include/asm/clkdev.h
  create mode 100644 arch/c6x/include/asm/clock.h
  create mode 100644 arch/c6x/include/asm/delay.h
  create mode 100644 arch/c6x/include/asm/dma-mapping.h
  create mode 100644 arch/c6x/include/asm/dscr.h
  create mode 100644 arch/c6x/include/asm/elf.h
  create mode 100644 arch/c6x/include/asm/ftrace.h
  create mode 100644 arch/c6x/include/asm/hardirq.h
  create mode 100644 arch/c6x/include/asm/irq.h
  create mode 100644 arch/c6x/include/asm/irqflags.h
  create mode 100644 arch/c6x/include/asm/linkage.h
  create mode 100644 arch/c6x/include/asm/megamod-pic.h
  create mode 100644 arch/c6x/include/asm/mmu.h
  create mode 100644 arch/c6x/include/asm/module.h
  create mode 100644 arch/c6x/include/asm/mutex.h
  create mode 100644 arch/c6x/include/asm/page.h
  create mode 100644 arch/c6x/include/asm/pgtable.h
  create mode 100644 arch/c6x/include/asm/processor.h
  create mode 100644 arch/c6x/include/asm/procinfo.h
  create mode 100644 arch/c6x/include/asm/prom.h
  create mode 100644 arch/c6x/include/asm/ptrace.h
  create mode 100644 arch/c6x/include/asm/sections.h
  create mode 100644 arch/c6x/include/asm/setup.h
  create mode 100644 arch/c6x/include/asm/sigcontext.h
  create mode 100644 arch/c6x/include/asm/signal.h
  create mode 100644 arch/c6x/include/asm/soc.h
  create mode 100644 arch/c6x/include/asm/string.h
  create mode 100644 arch/c6x/include/asm/swab.h
  create mode 100644 arch/c6x/include/asm/syscall.h
  create mode 100644 arch/c6x/include/asm/syscalls.h
  create mode 100644 arch/c6x/include/asm/system.h
  create mode 100644 arch/c6x/include/asm/thread_info.h
  create mode 100644 arch/c6x/include/asm/timer64.h
  create mode 100644 arch/c6x/include/asm/timex.h
  create mode 100644 arch/c6x/include/asm/tlb.h
  create mode 100644 arch/c6x/include/asm/traps.h
  create mode 100644 arch/c6x/include/asm/uaccess.h
  create mode 100644 arch/c6x/include/asm/unaligned.h
  create mode 100644 arch/c6x/include/asm/unistd.h
  create mode 100644 arch/c6x/kernel/Makefile
  create mode 100644 arch/c6x/kernel/asm-offsets.c
  create mode 100644 arch/c6x/kernel/c6x_ksyms.c
  create mode 100644 arch/c6x/kernel/devicetree.c
  create mode 100644 arch/c6x/kernel/dma.c
  create mode 100644 arch/c6x/kernel/entry.S
  create mode 100644 arch/c6x/kernel/head.S
  create mode 100644 arch/c6x/kernel/irq.c
  create mode 100644 arch/c6x/kernel/module.c
  create mode 100644 arch/c6x/kernel/process.c
  create mode 100644 arch/c6x/kernel/ptrace.c
  create mode 100644 arch/c6x/kernel/setup.c
  create mode 100644 arch/c6x/kernel/signal.c
  create mode 100644 arch/c6x/kernel/soc.c
  create mode 100644 arch/c6x/kernel/switch_to.S
  create mode 100644 arch/c6x/kernel/sys_c6x.c
  create mode 100644 arch/c6x/kernel/time.c
  create mode 100644 arch/c6x/kernel/traps.c
  create mode 100644 arch/c6x/kernel/vectors.S
  create mode 100644 arch/c6x/kernel/vmlinux.lds.S
  create mode 100644 arch/c6x/lib/Makefile
  create mode 100644 arch/c6x/lib/checksum.c
  create mode 100644 arch/c6x/lib/csum_64plus.S
  create mode 100644 arch/c6x/lib/divi.S
  create mode 100644 arch/c6x/lib/divremi.S
  create mode 100644 arch/c6x/lib/divremu.S
  create mode 100644 arch/c6x/lib/divu.S
  create mode 100644 arch/c6x/lib/llshl.S
  create mode 100644 arch/c6x/lib/llshr.S
  create mode 100644 arch/c6x/lib/llshru.S
  create mode 100644 arch/c6x/lib/memcpy_64plus.S
  create mode 100644 arch/c6x/lib/mpyll.S
  create mode 100644 arch/c6x/lib/negll.S
  create mode 100644 arch/c6x/lib/pop_rts.S
  create mode 100644 arch/c6x/lib/push_rts.S
  create mode 100644 arch/c6x/lib/remi.S
  create mode 100644 arch/c6x/lib/remu.S
  create mode 100644 arch/c6x/lib/strasgi.S
  create mode 100644 arch/c6x/lib/strasgi_64plus.S
  create mode 100644 arch/c6x/mm/Makefile
  create mode 100644 arch/c6x/mm/dma-coherent.c
  create mode 100644 arch/c6x/mm/init.c
  create mode 100644 arch/c6x/platforms/Kconfig
  create mode 100644 arch/c6x/platforms/Makefile
  create mode 100644 arch/c6x/platforms/cache.c
  create mode 100644 arch/c6x/platforms/dscr.c
  create mode 100644 arch/c6x/platforms/emif.c
  create mode 100644 arch/c6x/platforms/megamod-pic.c
  create mode 100644 arch/c6x/platforms/platform.c
  create mode 100644 arch/c6x/platforms/pll.c
  create mode 100644 arch/c6x/platforms/plldata.c
  create mode 100644 arch/c6x/platforms/timer64.c
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Merge tag 'for-linux-3.3-merge-window' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming

* tag 'for-linux-3.3-merge-window' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming: (29 commits)
  C6X: replace tick_nohz_stop/restart_sched_tick calls
  C6X: add register_cpu call
  C6X: deal with memblock API changes
  C6X: fix timer64 initialization
  C6X: fix layout of EMIFA registers
  C6X: MAINTAINERS
  C6X: DSCR - Device State Configuration Registers
  C6X: EMIF - External Memory Interface
  C6X: general SoC support
  C6X: library code
  C6X: headers
  C6X: ptrace support
  C6X: loadable module support
  C6X: cache control
  C6X: clocks
  C6X: build infrastructure
  C6X: syscalls
  C6X: interrupt handling
  C6X: time management
  C6X: signal management
  ...
2012-01-10 17:39:40 -08:00
Linus Torvalds 972b2c7199 Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
* 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (165 commits)
  reiserfs: Properly display mount options in /proc/mounts
  vfs: prevent remount read-only if pending removes
  vfs: count unlinked inodes
  vfs: protect remounting superblock read-only
  vfs: keep list of mounts for each superblock
  vfs: switch ->show_options() to struct dentry *
  vfs: switch ->show_path() to struct dentry *
  vfs: switch ->show_devname() to struct dentry *
  vfs: switch ->show_stats to struct dentry *
  switch security_path_chmod() to struct path *
  vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb
  vfs: trim includes a bit
  switch mnt_namespace ->root to struct mount
  vfs: take /proc/*/mounts and friends to fs/proc_namespace.c
  vfs: opencode mntget() mnt_set_mountpoint()
  vfs: spread struct mount - remaining argument of next_mnt()
  vfs: move fsnotify junk to struct mount
  vfs: move mnt_devname
  vfs: move mnt_list to struct mount
  vfs: switch pnode.h macros to struct mount *
  ...
2012-01-08 12:19:57 -08:00
Linus Torvalds fbce1c234f Changes queued in gpio/next for the start of the 3.3 merge window
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Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6

Changes queued in gpio/next for the start of the 3.3 merge window

* tag 'gpio-for-linus-20120104' of git://git.secretlab.ca/git/linux-2.6:
  gpio: Add decode of WM8994 GPIO configuration
  gpio: Convert GPIO drivers to module_platform_driver
  gpio: Fix typo in comment in Samsung driver
  gpio: Explicitly index samsung_gpio_cfgs
  gpio: Add Linus Walleij as gpio co-maintainer
  of: Add device tree selftests
  of: create of_phandle_args to simplify return of phandle parsing data
  gpio/powerpc: Eliminate duplication of of_get_named_gpio_flags()
  gpio/microblaze: Eliminate duplication of of_get_named_gpio_flags()
  gpiolib: output basic details and consolidate gpio device drivers
  pch_gpio: Change company name OKI SEMICONDUCTOR to LAPIS Semiconductor
  pch_gpio: Support new device LAPIS Semiconductor ML7831 IOH
  spi/pl022: make the chip deselect handling thread safe
  spi/pl022: add support for pm_runtime autosuspend
  spi/pl022: disable the PL022 block when unused
  spi/pl022: move device disable to workqueue thread
  spi/pl022: skip default configuration before suspending
  spi/pl022: fix build warnings
  spi/pl022: only enable RX interrupts when TX is complete
2012-01-07 12:15:36 -08:00
Linus Torvalds 9753dfe19a Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1958 commits)
  net: pack skb_shared_info more efficiently
  net_sched: red: split red_parms into parms and vars
  net_sched: sfq: extend limits
  cnic: Improve error recovery on bnx2x devices
  cnic: Re-init dev->stats_addr after chip reset
  net_sched: Bug in netem reordering
  bna: fix sparse warnings/errors
  bna: make ethtool_ops and strings const
  xgmac: cleanups
  net: make ethtool_ops const
  vmxnet3" make ethtool ops const
  xen-netback: make ops structs const
  virtio_net: Pass gfp flags when allocating rx buffers.
  ixgbe: FCoE: Add support for ndo_get_fcoe_hbainfo() call
  netdev: FCoE: Add new ndo_get_fcoe_hbainfo() call
  igb: reset PHY after recovering from PHY power down
  igb: add basic runtime PM support
  igb: Add support for byte queue limits.
  e1000: cleanup CE4100 MDIO registers access
  e1000: unmap ce4100_gbe_mdio_base_virt in e1000_remove
  ...
2012-01-06 17:22:09 -08:00
Linus Torvalds 0db49b72bc Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (40 commits)
  sched/tracing: Add a new tracepoint for sleeptime
  sched: Disable scheduler warnings during oopses
  sched: Fix cgroup movement of waking process
  sched: Fix cgroup movement of newly created process
  sched: Fix cgroup movement of forking process
  sched: Remove cfs bandwidth period check in tg_set_cfs_period()
  sched: Fix load-balance lock-breaking
  sched: Replace all_pinned with a generic flags field
  sched: Only queue remote wakeups when crossing cache boundaries
  sched: Add missing rcu_dereference() around ->real_parent usage
  [S390] fix cputime overflow in uptime_proc_show
  [S390] cputime: add sparse checking and cleanup
  sched: Mark parent and real_parent as __rcu
  sched, nohz: Fix missing RCU read lock
  sched, nohz: Set the NOHZ_BALANCE_KICK flag for idle load balancer
  sched, nohz: Fix the idle cpu check in nohz_idle_balance
  sched: Use jump_labels for sched_feat
  sched/accounting: Fix parameter passing in task_group_account_field
  sched/accounting: Fix user/system tick double accounting
  sched/accounting: Re-use scheduler statistics for the root cgroup
  ...

Fix up conflicts in
 - arch/ia64/include/asm/cputime.h, include/asm-generic/cputime.h
	usecs_to_cputime64() vs the sparse cleanups
 - kernel/sched/fair.c, kernel/time/tick-sched.c
	scheduler changes in multiple branches
2012-01-06 08:44:54 -08:00
John Crispin 1a0703ede4 GPIO: add bindings for managed devices
This patch adds 2 functions that allow managed devices to request GPIOs.
These GPIOs will then be managed by drivers/base/devres.c.

Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-01-04 11:37:42 -07:00
Al Viro 0583fcc96b consolidate umode_t declarations
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-03 22:55:17 -05:00
David S. Miller 7f8e3234c5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2011-12-30 13:04:14 -05:00
Andreas Schwab 34845636a1 procfs: do not confuse jiffies with cputime64_t
Commit 2a95ea6c0d ("procfs: do not overflow get_{idle,iowait}_time
for nohz") did not take into account that one some architectures jiffies
and cputime use different units.

This causes get_idle_time() to return numbers in the wrong units, making
the idle time fields in /proc/stat wrong.

Instead of converting the usec value returned by
get_cpu_{idle,iowait}_time_us to units of jiffies, use the new function
usecs_to_cputime64 to convert it to the correct unit of cputime64_t.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "Artem S. Tashkinov" <t.artem@mailcity.com>
Cc: Dave Jones <davej@redhat.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-12-29 16:31:57 -08:00
David S. Miller abb434cb05 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	net/bluetooth/l2cap_core.c

Just two overlapping changes, one added an initialization of
a local variable, and another change added a new local variable.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-23 17:13:56 -05:00
Martin Schwidefsky 648616343c [S390] cputime: add sparse checking and cleanup
Make cputime_t and cputime64_t nocast to enable sparse checking to
detect incorrect use of cputime. Drop the cputime macros for simple
scalar operations. The conversion macros are still needed.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-15 14:56:19 +01:00
David Howells 3d7f1dc195 UAPI: Rearrange definition of HZ in asm-generic/param.h
Rearrange the definition of HZ in asm-generic/param.h so that the user-specific
is declared before the kernel-specific one.  We then explicitly #undef the
userspace HZ value and replace it with the kernel HZ value.

This allows the userspace params to be excised into a separate header as part
of the UAPI header split.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2011-12-13 09:26:45 +00:00
Grant Likely 15c9a0acc3 of: create of_phandle_args to simplify return of phandle parsing data
of_parse_phandle_with_args() needs to return quite a bit of data.  Rather
than making each datum a separate **out_ argument, this patch creates
struct of_phandle_args to contain all the returned data and reworks the
user of the function.  This patch also enables of_parse_phandle_with_args()
to return the device node pointer for the phandle node.

This patch also ends up being fairly major surgery to
of_parse_handle_with_args().  The existing structure didn't work well
when extending to use of_phandle_args, and I discovered bugs during testing.
I also took the opportunity to rename the function to be like the
existing of_parse_phandle().

v2: - moved declaration of of_phandle_args to fix compile on non-DT builds
    - fixed incorrect index in example usage
    - fixed incorrect return code handling for empty entries

Reviewed-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-12-12 13:40:16 -07:00
Grant Likely 1a2d397a6e gpio/powerpc: Eliminate duplication of of_get_named_gpio_flags()
A large chunk of qe_pin_request() is unnecessarily cut-and-paste
directly from of_get_named_gpio_flags().  This patch cuts out the
duplicate code and replaces it with a call to of_get_gpio().

v2: fixed compile error due to missing gpio_to_chip()

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Kumar Gala <galak@kernel.crashing.org>
2011-12-12 13:40:16 -07:00
Chris Metcalf a67ba43d30 asm-generic/unistd.h: support new process_vm_{readv,write} syscalls
Also prototype the "compat" functions so they can be referenced
from C code.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2011-12-03 15:31:48 -05:00
Michael S. Tsirkin 66eab4df28 lib: add GENERIC_PCI_IOMAP
Many architectures want a generic pci_iomap but
not the rest of iomap.c. Split that to a separate .c
file and add a new config symbol. select automatically
by GENERIC_IOMAP.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2011-11-28 21:12:42 +02:00
John W. Linville e11c259f74 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
Conflicts:
	include/net/bluetooth/bluetooth.h
2011-11-17 13:11:43 -05:00
Johannes Berg 6e3e939f3b net: add wireless TX status socket option
The 802.1X EAPOL handshake hostapd does requires
knowing whether the frame was ack'ed by the peer.
Currently, we fudge this pretty badly by not even
transmitting the frame as a normal data frame but
injecting it with radiotap and getting the status
out of radiotap monitor as well. This is rather
complex, confuses users (mon.wlan0 presence) and
doesn't work with all hardware.

To get rid of that hack, introduce a real wifi TX
status option for data frame transmissions.

This works similar to the existing TX timestamping
in that it reflects the SKB back to the socket's
error queue with a SCM_WIFI_STATUS cmsg that has
an int indicating ACK status (0/1).

Since it is possible that at some point we will
want to have TX timestamping and wifi status in a
single errqueue SKB (there's little point in not
doing that), redefine SO_EE_ORIGIN_TIMESTAMPING
to SO_EE_ORIGIN_TXSTATUS which can collect more
than just the timestamp; keep the old constant
as an alias of course. Currently the internal APIs
don't make that possible, but it wouldn't be hard
to split them up in a way that makes it possible.

Thanks to Neil Horman for helping me figure out
the functions that add the control messages.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-11-09 16:01:02 -05:00
Linus Torvalds c87d5d5947 Merge Qualcom Hexagon architecture
This is the fifth version of the patchset (with one tiny whitespace fix)
to the Linux kernel to support the Qualcomm Hexagon architecture.

Between now and the next pull requests, Richard Kuo should have his key
signed, etc., and should be back on kernel.org.  In the meantime, this
got merged as a emailed patch-series.

* Hexagon: (36 commits)
  Add extra arch overrides to asm-generic/checksum.h
  Hexagon: Add self to MAINTAINERS
  Hexagon: Add basic stacktrace functionality for Hexagon architecture.
  Hexagon: Add configuration and makefiles for the Hexagon architecture.
  Hexagon: Comet platform support
  Hexagon: kgdb support files
  Hexagon: Add page-fault support.
  Hexagon: Add page table header files & etc.
  Hexagon: Add ioremap support
  Hexagon: Provide DMA implementation
  Hexagon: Implement basic TLB management routines for Hexagon.
  Hexagon: Implement basic cache-flush support
  Hexagon: Provide basic implementation and/or stubs for I/O routines.
  Hexagon: Add user access functions
  Hexagon: Add locking types and functions
  Hexagon: Add SMP support
  Hexagon: Provide basic debugging and system trap support.
  Hexagon: Add ptrace support
  Hexagon: Add time and timer functions
  Hexagon: Add interrupts
  ...
2011-11-01 07:48:13 -07:00
Linas Vepstas 4e29198e1c Add extra arch overrides to asm-generic/checksum.h
There are plausible reasons for architectures to provide their own
versions of csum_partial_copy_nocheck and csum_tcpudp_magic.
By protecting these, the architecture can still re-use the
asm-generic checksum.h, instead of copying it.

Signed-off-by: Linas Vepstas <linas@codeaurora.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-11-01 07:34:21 -07:00
Richard Kuo dd472da380 Hexagon: Add locking types and functions
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-11-01 07:34:20 -07:00
Joe Perches b9075fa968 treewide: use __printf not __attribute__((format(printf,...)))
Standardize the style for compiler based printf format verification.
Standardized the location of __printf too.

Done via script and a little typing.

$ grep -rPl --include=*.[ch] -w "__attribute__" * | \
  grep -vP "^(tools|scripts|include/linux/compiler-gcc.h)" | \
  xargs perl -n -i -e 'local $/; while (<>) { s/\b__attribute__\s*\(\s*\(\s*format\s*\(\s*printf\s*,\s*(.+)\s*,\s*(.+)\s*\)\s*\)\s*\)/__printf($1, $2)/g ; print; }'

[akpm@linux-foundation.org: revert arch bits]
Signed-off-by: Joe Perches <joe@perches.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-10-31 17:30:54 -07:00
Sonic Zhang 06d5e032ad include/asm-generic/page.h: calculate virt_to_page and page_to_virt via predefined macro
On NOMMU architectures, if physical memory doesn't start from 0,
ARCH_PFN_OFFSET is defined to generate page index in mem_map array.
Because virtual address is equal to physical address, PAGE_OFFSET is
always 0.  virt_to_page and page_to_virt should not index page by
PAGE_OFFSET directly.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Cc: Greg Ungerer <gerg@snapgear.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-10-31 17:30:48 -07:00
Clemens Ladisch 07a723097c dma-mapping: fix sync_single_range_* DMA debugging
Commit 5fd75a7850 (dma-mapping: remove unnecessary sync_single_range_*
in dma_map_ops) unified not only the dma_map_ops but also the
corresponding debug_dma_sync_* calls.  This led to spurious WARN()ings
like the following because the DMA debug code was no longer able to detect
the DMA buffer base address without the separate offset parameter:

WARNING: at lib/dma-debug.c:911 check_sync+0xce/0x446()
firewire_ohci 0000:04:00.0: DMA-API: device driver tries to sync DMA memory it has not allocated [device address=0x00000000cedaa400] [size=1024 bytes]
Call Trace: ...
 [<ffffffff811326a5>] check_sync+0xce/0x446
 [<ffffffff81132ad9>] debug_dma_sync_single_for_device+0x39/0x3b
 [<ffffffffa01d6e6a>] ohci_queue_iso+0x4f3/0x77d [firewire_ohci]
 ...

To fix this, unshare the sync_single_* and sync_single_range_*
implementations so that we are able to call the correct debug_dma_sync_*
functions.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-10-31 17:30:44 -07:00
Linus Torvalds 41684f67af Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6
* 'gpio/next' of git://git.secretlab.ca/git/linux-2.6:
  h8300: Move gpio.h to gpio-internal.h
  gpio: pl061: add DT binding support
  gpio: fix build error in include/asm-generic/gpio.h
  gpiolib: Ensure struct gpio is always defined
  irq: Add EXPORT_SYMBOL_GPL to function of irq generic-chip
  gpio-ml-ioh: Use NUMA_NO_NODE not GFP_KERNEL
  gpio-pch: Use NUMA_NO_NODE not GFP_KERNEL
  gpio: langwell: ensure alternate function is cleared
  gpio-pch: Support interrupt function
  gpio-pch: Save register value in suspend()
  gpio-pch: modify gpio_nums and mask
  gpio-pch: support ML7223 IOH n-Bus
  gpio-pch: add spinlock in suspend/resume processing
  gpio-pch: Delete invalid "restore" code in suspend()
  gpio-ml-ioh: Fix suspend/resume issue
  gpio-ml-ioh: Support interrupt function
  gpio-ml-ioh: Delete unnecessary code
  gpio/mxc: add chained_irq_enter/exit() to mx3_gpio_irq_handler()
  gpio/nomadik: use genirq core to track enablement
  gpio/nomadik: disable clocks when unused
2011-10-29 07:27:45 -07:00
Hamo eb9ae7f2a3 gpio: fix build error in include/asm-generic/gpio.h
Should call the platform-specific __gpio_{get,set}_value
instead of generic gpio_{get,set}_value

Signed-off-by: Yang Bai <hamo.by@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-10-26 23:15:28 +02:00
Linus Torvalds 39adff5f69 Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
  time, s390: Get rid of compile warning
  dw_apb_timer: constify clocksource name
  time: Cleanup old CONFIG_GENERIC_TIME references that snuck in
  time: Change jiffies_to_clock_t() argument type to unsigned long
  alarmtimers: Fix error handling
  clocksource: Make watchdog reset lockless
  posix-cpu-timers: Cure SMP accounting oddities
  s390: Use direct ktime path for s390 clockevent device
  clockevents: Add direct ktime programming function
  clockevents: Make minimum delay adjustments configurable
  nohz: Remove "Switched to NOHz mode" debugging messages
  proc: Consider NO_HZ when printing idle and iowait times
  nohz: Make idle/iowait counter update conditional
  nohz: Fix update_ts_time_stat idle accounting
  cputime: Clean up cputime_to_usecs and usecs_to_cputime macros
  alarmtimers: Rework RTC device selection using class interface
  alarmtimers: Add try_to_cancel functionality
  alarmtimers: Add more refined alarm state tracking
  alarmtimers: Remove period from alarm structure
  alarmtimers: Remove interval cap limit hack
  ...
2011-10-26 17:15:03 +02:00
Linus Torvalds 1442d1678c Merge branch 'for-3.2' of git://linux-nfs.org/~bfields/linux
* 'for-3.2' of git://linux-nfs.org/~bfields/linux: (103 commits)
  nfs41: implement DESTROY_CLIENTID operation
  nfsd4: typo logical vs bitwise negate for want_mask
  nfsd4: allow NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED
  nfsd4: seq->status_flags may be used unitialized
  nfsd41: use SEQ4_STATUS_BACKCHANNEL_FAULT when cb_sequence is invalid
  nfsd4: implement new 4.1 open reclaim types
  nfsd4: remove unneeded CLAIM_DELEGATE_CUR workaround
  nfsd4: warn on open failure after create
  nfsd4: preallocate open stateid in process_open1()
  nfsd4: do idr preallocation with stateid allocation
  nfsd4: preallocate nfs4_file in process_open1()
  nfsd4: clean up open owners on OPEN failure
  nfsd4: simplify process_open1 logic
  nfsd4: make is_open_owner boolean
  nfsd4: centralize renew_client() calls
  nfsd4: typo logical vs bitwise negate
  nfs: fix bug about IPv6 address scope checking
  nfsd4: more robust ignoring of WANT bits in OPEN
  nfsd4: move name-length checks to xdr
  nfsd4: move access/deny validity checks to xdr code
  ...
2011-10-25 15:42:01 +02:00
Kirill Tkhai bc74ee9769 m68k: Finally remove leftover markers sections
Markers have removed already twice:

1: fc5377668c
2: eb878b3bc0

But a little bit is still here.

Signed-off-by: Tkhai Kirill <tkhai@yandex.ru>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-10-24 21:00:34 +02:00
Mark Brown feb8369924 gpiolib: Ensure struct gpio is always defined
Currently struct gpio is only defined when using gpiolib which makes the
stub gpio_request_array() much less useful in drivers than is ideal as
they can't work with struct gpio.  Since there are no other definitions
in kernel instead make the define always available no matter if gpiolib
is selectable or selected, ensuring that drivers can always use the
type.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-10-24 16:04:06 +02:00
Mark Salter e66d3c490c add missing __iomem to generic iounmap declaration
Signed-off-by: Mark Salter <msalter@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2011-10-06 19:47:22 -04:00
Mark Salter b7a0556e0f fixed generic page.h for non-zero PAGE_OFFSET
asm-generic/page.h had several problems when used with a non-zero PAGE_OFFSET.
This patch adds a default ARCH_PFN_OFFSET and fixes the __va, __pa, and
pfn_valid macros to work with non-zero PAGE_OFFSETs.

Signed-off-by: Mark Salter <msalter@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2011-10-06 19:47:16 -04:00
Mark Salter 830f5800ac fix default __strnlen_user macro
The existing __strnlen_user macro simply resolved to strnlen. However, the
count returned by strnlen_user should include the NULL byte. This patch
fixes the __strnlen_user macro to include the NULL byte in the count.

Signed-off-by: Mark Salter <msalter@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2011-10-06 19:47:12 -04:00
Michal Hocko ef0e0f5ed9 cputime: Clean up cputime_to_usecs and usecs_to_cputime macros
Get rid of semicolon so that those expressions can be used also
somewhere else than just in an assignment.

Signed-off-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Dave Jones <davej@redhat.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Link: http://lkml.kernel.org/r/7565417ce30d7e6b1ddc169843af0777dbf66e75.1314172057.git.mhocko@suse.cz
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-09-08 11:10:55 +02:00
NeilBrown f5b9409973 All Arch: remove linkage for sys_nfsservctl system call
The nfsservctl system call is now gone, so we should remove all
linkage for it.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-26 15:09:58 -07:00
J. Bruce Fields 710b721696 locks: move F_INPROGRESS from fl_type to fl_flags field
F_INPROGRESS isn't exposed to userspace.  To me it makes more sense in
fl_flags....

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-08-19 13:25:34 -04:00
Ian Campbell aa462abe8a mm: fix __page_to_pfn for a const struct page argument
This allows the cast in lowmem_page_address (introduced as a warning
fixup to 33dd4e0ec9 "mm: make some struct page's const") to be
removed.

Propagate const'ness to page_to_section() as well since it is required
by __page_to_pfn.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-17 13:00:20 -07:00
Linus Torvalds 3960ef326a Merge branch 'next/cross-platform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-arm-soc
* 'next/cross-platform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-arm-soc:
  ARM: Consolidate the clkdev header files
  ARM: set vga memory base at run-time
  ARM: convert PCI defines to variables
  ARM: pci: make pcibios_assign_all_busses use pci_has_flag
  ARM: remove unnecessary mach/hardware.h includes
  pci: move microblaze and powerpc pci flag functions into asm-generic
  powerpc: rename ppc_pci_*_flags to pci_*_flags

Fix up conflicts in arch/microblaze/include/asm/pci-bridge.h
2011-07-26 17:12:10 -07:00
Mike Frysinger 7505cb60c2 asm-generic/atomic.h: allow SMP peeps to leverage this
Only a few core funcs need to be implemented for SMP systems, so allow the
arches to override them while getting the rest for free.

At least, this is enough to allow the Blackfin SMP port to use things.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Arun Sharma <asharma@fb.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:48 -07:00
Mike Frysinger 00b3c28bd7 asm-generic/atomic.h: add atomic_set_mask() helper
Since arches are expected to implement this guy, add a common version for
people the same way as atomic_clear_mask is handled.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Arun Sharma <asharma@fb.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:48 -07:00
Mike Frysinger f6081bd3f8 asm-generic/atomic.h: fix type used in atomic_clear_mask
The atomic helpers are supposed to take an atomic_t pointer, not a random
unsigned long pointer.  So convert atomic_clear_mask over.

While we're here, also add some nice documentation to the func.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Arun Sharma <asharma@fb.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:47 -07:00
Mike Frysinger 3eea44ea75 asm-generic/atomic.h: simplify inc/dec test helpers
We already declared inc/dec helpers, so we don't need to call the
atomic_{add,sub}_return funcs directly.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Arun Sharma <asharma@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:47 -07:00
Arun Sharma acac43e2fc atomic: Update comments in atomic.h
This clarifies the differences between <linux/atomic.h> and
<asm-generic/atomic.h>

Signed-off-by: Arun Sharma <asharma@fb.com>
Suggested-by: Mike Frysinger <vapier.adi@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:47 -07:00
Arun Sharma 7847777a45 atomic: cleanup asm-generic atomic*.h inclusion
After changing all consumers of atomics to include <linux/atomic.h>, we
ran into some compile time errors due to this dependency chain:

linux/atomic.h
  -> asm/atomic.h
    -> asm-generic/atomic-long.h

where atomic-long.h could use funcs defined later in linux/atomic.h
without a prototype.  This patches moves the code that includes
asm-generic/atomic*.h to linux/atomic.h.

Archs that need <asm-generic/atomic64.h> need to select
CONFIG_GENERIC_ATOMIC64 from now on (some of them used to include it
unconditionally).

Compile tested on i386 and x86_64 with allnoconfig.

Signed-off-by: Arun Sharma <asharma@fb.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:47 -07:00
Arun Sharma f24219b4e9 atomic: move atomic_add_unless to generic code
This is in preparation for more generic atomic primitives based on
__atomic_add_unless.

Signed-off-by: Arun Sharma <asharma@fb.com>
Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:47 -07:00
Arun Sharma 60063497a9 atomic: use <linux/atomic.h>
This allows us to move duplicated code in <asm/atomic.h>
(atomic_inc_not_zero() for now) to <linux/atomic.h>

Signed-off-by: Arun Sharma <asharma@fb.com>
Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:47 -07:00
Akinobu Mita 148817ba09 asm-generic: add another generic ext2 atomic bitops
The majority of architectures implement ext2 atomic bitops as
test_and_{set,clear}_bit() without spinlock.

This adds this type of generic implementation in ext2-atomic-setbit.h and
use it wherever possible.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Suggested-by: Andreas Dilger <adilger@dilger.ca>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:46 -07:00
Linus Torvalds 45b583b10a Merge 'akpm' patch series
* Merge akpm patch series: (122 commits)
  drivers/connector/cn_proc.c: remove unused local
  Documentation/SubmitChecklist: add RCU debug config options
  reiserfs: use hweight_long()
  reiserfs: use proper little-endian bitops
  pnpacpi: register disabled resources
  drivers/rtc/rtc-tegra.c: properly initialize spinlock
  drivers/rtc/rtc-twl.c: check return value of twl_rtc_write_u8() in twl_rtc_set_time()
  drivers/rtc: add support for Qualcomm PMIC8xxx RTC
  drivers/rtc/rtc-s3c.c: support clock gating
  drivers/rtc/rtc-mpc5121.c: add support for RTC on MPC5200
  init: skip calibration delay if previously done
  misc/eeprom: add eeprom access driver for digsy_mtc board
  misc/eeprom: add driver for microwire 93xx46 EEPROMs
  checkpatch.pl: update $logFunctions
  checkpatch: make utf-8 test --strict
  checkpatch.pl: add ability to ignore various messages
  checkpatch: add a "prefer __aligned" check
  checkpatch: validate signature styles and To: and Cc: lines
  checkpatch: add __rcu as a sparse modifier
  checkpatch: suggest using min_t or max_t
  ...

Did this as a merge because of (trivial) conflicts in
 - Documentation/feature-removal-schedule.txt
 - arch/xtensa/include/asm/uaccess.h
that were just easier to fix up in the merge than in the patch series.
2011-07-25 21:00:19 -07:00
Mike Frysinger 5190f0c030 asm-generic/system.h: drop useless __KERNEL__
This header isn't exported to user-space, and even if it was, the
__KERNEL__ check covers the entire file, so we'd get a useless stub in the
first place.  So punt it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-25 20:57:14 -07:00
Randy Dunlap fea80311a9 iomap: make IOPORT/PCI mapping functions conditional
When CONFIG_PCI is not enabled, CONFIG_EISA=y, and CONFIG_GENERIC_IOMAP=y,
drivers/net/3c59x.c build fails due to a recent small change to
<asm-generic/iomap.h> that surrounds pci_iomap() and pci_iounmap() with
#ifdef CONFIG_PCI/#endif.

Since that patch to iomap.h looks correct, add stubs for pci_iomap() and
pci_iounmap() with CONFIG_PCI is not enabled to fix the build errors.

  drivers/net/3c59x.c:1026: error: implicit declaration of function 'pci_iomap'
  drivers/net/3c59x.c:1038: error: implicit declaration of function 'pci_iounmap'

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-25 10:32:42 -07:00
Jonas Bonn 82ed223c26 iomap: make IOPORT/PCI mapping functions conditional
Use the CONFIG_HAS_IOPORT and CONFIG_PCI options to decide whether or
not functions for mapping these areas are provided.

Signed-off-by: Jonas Bonn <jonas@southpole.se>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2011-07-22 18:46:26 +02:00
Jonas Bonn f1ecc69838 asm-generic: add MMU variants of io.h functions
Some of the implementations, in particular the ioremap variants, in
asm-generic/io.h are for systems without an MMU.  In order to be able to
use the generic header file for systems with an MMU, this patch wraps
these implementations in checks for CONFIG_MMU.

Tested on OpenRISC.

Signed-off-by: Jonas Bonn <jonas@southpole.se>
Cc: liqin.chen@sunplusct.com
Cc: gxt@mprc.pku.edu.cn
Acked-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2011-07-22 18:46:25 +02:00
Andrew Morton a87e553fab asm-generic: delay.h fix udelay and ndelay for 8 bit args
With a non-constant 8-bit argument, a call to udelay() generates a warning:

drivers/gpu/drm/radeon/atom.c: In function 'atom_op_delay':
drivers/gpu/drm/radeon/atom.c:654: warning: comparison is always false due to limited range of data type

The code looks like it works OK with an 8-bit arg, and the calling code is
doing nothing wrong, so udelay() needs fixing.

Fixing it was rather tricky.  Simply typecasting `n' in the comparison with
20000 didn't change anything.  Hence the divide-by-20000 trick.

Using a do{}while loop didn't work because udelay() is used in ?: statements,
hence the ({...}) construct.

While I was there I replaced the brain-bending ?:?:?: mess with nice if/else
code.

Probably other architectures are generating the same warning and can use a
similar change.

[Taken from the x86 tree and moved to asm-generic by Jonas Bonn]

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jonas Bonn <jonas@southpole.se>
2011-07-22 18:45:33 +02:00
Rob Herring f4ffd5e5df pci: move microblaze and powerpc pci flag functions into asm-generic
Move separate microblaze and powerpc pci flag functions pci_set_flags,
pci_add_flags, and pci_has_flag into asm-generic/pci-bridge.h so other
archs can use them.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-07-12 11:13:07 -05:00
Jonas Bonn 30ab2b034f asm-generic: adapt delay.h to common implementation
Several architectures are using a common delay.h implementation that
appears to have originated with the x86 architecture.  This common
implementation is a bit fuller than the current asm-generic version
and has some compile-time checks that should be interesting for all
architectures.

This patch takes the common delay.h version and replaces the rather
trivial asm-generic version with it.  As no architecture was actually
using asm-generic/delay.h, this change is rather innocuous; it will,
however, allow us to switch at least four architectures over to using
the asm-generic version.

Signed-off-by: Jonas Bonn <jonas@southpole.se>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2011-07-07 20:11:39 +02:00
Linus Torvalds 0835619348 Merge branches 'gpio/merge' and 'spi/merge' of git://git.secretlab.ca/git/linux-2.6
* 'gpio/merge' of git://git.secretlab.ca/git/linux-2.6:
  gpio: add GPIOF_ values regardless on kconfig settings
  gpio: include linux/gpio.h where needed
  gpio/omap4: Fix missing interrupts during device wakeup due to IOPAD.

* 'spi/merge' of git://git.secretlab.ca/git/linux-2.6:
  spi/bfin_spi: fix handling of default bits per word setting
2011-06-17 10:36:32 -07:00
Randy Dunlap c001fb72a7 gpio: add GPIOF_ values regardless on kconfig settings
Make GPIOF_ defined values available even when GPIOLIB nor GENERIC_GPIO
is enabled by moving them to <linux/gpio.h>.

Fixes these build errors in linux-next:
sound/soc/codecs/ak4641.c:524: error: 'GPIOF_OUT_INIT_LOW' undeclared (first use in this function)
sound/soc/codecs/wm8915.c:2921: error: 'GPIOF_OUT_INIT_LOW' undeclared (first use in this function)

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-16 08:40:52 -06:00
Nicolas Kaiser 49b24d6b41 include/asm-generic/pgtable.h: fix unbalanced parenthesis
Signed-off-by: Nicolas Kaiser <nikai@nikai.net>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-15 20:04:00 -07:00
Chris Metcalf b36a968927 asm-generic/unistd.h: support sendmmsg syscall
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2011-06-02 14:31:38 -04:00
Linus Torvalds 04830fccdc Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6
* 'gpio/next' of git://git.secretlab.ca/git/linux-2.6:
  gpio/pch_gpio: Support new device ML7223
  gpio: make gpio_{request,free}_array gpio array parameter const
  GPIO: OMAP: move to drivers/gpio
  GPIO: OMAP: move register offset defines into <plat/gpio.h>
  gpio: Convert gpio_is_valid to return bool
  gpio: Move the s5pc100 GPIO to drivers/gpio
  gpio: Move the s5pv210 GPIO to drivers/gpio
  gpio: Move the exynos4 GPIO to drivers/gpio
  gpio: Move to Samsung common GPIO library to drivers/gpio
  gpio/nomadik: add function to read GPIO pull down status
  gpio/nomadik: show all pins in debug
  gpio: move Nomadik GPIO driver to drivers/gpio
  gpio: move U300 GPIO driver to drivers/gpio
  langwell_gpio: add runtime pm support
  gpio/pca953x: Add support for pca9574 and pca9575 devices
  gpio/cs5535: Show explicit dependency between gpio_cs5535 and mfd_cs5535
2011-05-28 10:56:34 -07:00
Linus Torvalds 571503e100 Merge branch 'setns'
* setns:
  ns: Wire up the setns system call

Done as a merge to make it easier to fix up conflicts in arm due to
addition of sendmmsg system call
2011-05-28 10:51:01 -07:00
Eric W. Biederman 7b21fddd08 ns: Wire up the setns system call
32bit and 64bit on x86 are tested and working.  The rest I have looked
at closely and I can't find any problems.

setns is an easy system call to wire up.  It just takes two ints so I
don't expect any weird architecture porting problems.

While doing this I have noticed that we have some architectures that are
very slow to get new system calls.  cris seems to be the slowest where
the last system calls wired up were preadv and pwritev.  avr32 is weird
in that recvmmsg was wired up but never declared in unistd.h.  frv is
behind with perf_event_open being the last syscall wired up.  On h8300
the last system call wired up was epoll_wait.  On m32r the last system
call wired up was fallocate.  mn10300 has recvmmsg as the last system
call wired up.  The rest seem to at least have syncfs wired up which was
new in the 2.6.39.

v2: Most of the architecture support added by Daniel Lezcano <dlezcano@fr.ibm.com>
v3: ported to v2.6.36-rc4 by: Eric W. Biederman <ebiederm@xmission.com>
v4: Moved wiring up of the system call to another patch
v5: ported to v2.6.39-rc6
v6: rebased onto parisc-next and net-next to avoid syscall  conflicts.
v7: ported to Linus's latest post 2.6.39 tree.

>  arch/blackfin/include/asm/unistd.h     |    3 ++-
>  arch/blackfin/mach-common/entry.S      |    1 +
Acked-by: Mike Frysinger <vapier@gentoo.org>

Oh - ia64 wiring looks good.
Acked-by: Tony Luck <tony.luck@intel.com>

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-28 10:48:39 -07:00
Lars-Peter Clausen 7c295975a8 gpio: make gpio_{request,free}_array gpio array parameter const
gpio_{request,free}_array should not (and do not) modify the passed gpio
array, so make the parameter const.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-05-27 17:56:45 -06:00
Linus Torvalds 10799db60c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
  net: Kill ratelimit.h dependency in linux/net.h
  net: Add linux/sysctl.h includes where needed.
  net: Kill ether_table[] declaration.
  inetpeer: fix race in unused_list manipulations
  atm: expose ATM device index in sysfs
  IPVS: bug in ip_vs_ftp, same list heaad used in all netns.
  bug.h: Move ratelimit warn interfaces to ratelimit.h
  bonding: cleanup module option descriptions
  net:8021q:vlan.c Fix pr_info to just give the vlan fullname and version.
  net: davinci_emac: fix dev_err use at probe
  can: convert to %pK for kptr_restrict support
  net: fix ETHTOOL_SFEATURES compatibility with old ethtool_ops.set_flags
  netfilter: Fix several warnings in compat_mtw_from_user().
  netfilter: ipset: fix ip_set_flush return code
  netfilter: ipset: remove unused variable from type_pf_tdel()
  netfilter: ipset: Use proper timeout value to jiffies conversion
2011-05-27 11:16:27 -07:00