Commit Graph

643 Commits

Author SHA1 Message Date
David S. Miller e04ed38d4e sparc64: Fix Niagara2 perf event handling.
For chips like Niagara2 that have true overflow indications
in the %pcr (which we don't actually need and don't use)
the interrupt signal persists until the overflow bits are
cleared by an explicit %pcr write.

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-01-04 23:16:03 -08:00
David S. Miller 8183e2b384 sparc64: Fix NMI programming when perf events are active.
If perf events are active, we should not reset the %pcr to
PCR_PIC_PRIV.  That perf events code does the management.

Signed-off-by: David S. Miller <davem@davemloft.net>
2010-01-04 15:37:04 -08:00
Linus Torvalds 74f3ae7434 Merge branch 'module' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
* 'module' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  modpost: fix segfault with short symbol names
  module: handle ppc64 relocating kcrctabs when CONFIG_RELOCATABLE=y
  Kbuild: clear marker out of modpost
  module: make MODULE_SYMBOL_PREFIX into a CONFIG option
  ARM: unexport symbols used to implement floating point emulation
  ARM: use unified discard definition in linker script
  x86: don't export inline function
  sparc64: don't export static inline pci_ functions
2009-12-16 10:47:24 -08:00
Akinobu Mita e756fd8080 sparc: use bitmap_find_next_zero_area
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-16 07:20:19 -08:00
Akinobu Mita a66022c457 iommu-helper: use bitmap library
Use bitmap library and kill some unused iommu helper functions.

1. s/iommu_area_free/bitmap_clear/

2. s/iommu_area_reserve/bitmap_set/

3. Use bitmap_find_next_zero_area instead of find_next_zero_area

  This cannot be simple substitution because find_next_zero_area
  doesn't check the last bit of the limit in bitmap

4. Remove iommu_area_free, iommu_area_reserve, and find_next_zero_area

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-16 07:20:18 -08:00
Linus Torvalds 8f0ddf91f2 Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (26 commits)
  clockevents: Convert to raw_spinlock
  clockevents: Make tick_device_lock static
  debugobjects: Convert to raw_spinlocks
  perf_event: Convert to raw_spinlock
  hrtimers: Convert to raw_spinlocks
  genirq: Convert irq_desc.lock to raw_spinlock
  smp: Convert smplocks to raw_spinlocks
  rtmutes: Convert rtmutex.lock to raw_spinlock
  sched: Convert pi_lock to raw_spinlock
  sched: Convert cpupri lock to raw_spinlock
  sched: Convert rt_runtime_lock to raw_spinlock
  sched: Convert rq->lock to raw_spinlock
  plist: Make plist debugging raw_spinlock aware
  bkl: Fixup core_lock fallout
  locking: Cleanup the name space completely
  locking: Further name space cleanups
  alpha: Fix fallout from locking changes
  locking: Implement new raw_spinlock
  locking: Convert raw_rwlock functions to arch_rwlock
  locking: Convert raw_rwlock to arch_rwlock
  ...
2009-12-15 09:02:01 -08:00
Linus Torvalds 17c330f983 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Fix clock event multiplier printf format.
  sparc64: Use clock{source,events}_calc_mult_shift().
  sparc64: Use free_bootmem_late() in mdesc_lmb_free().
  sparc: Add alignment and emulation fault perf events.
  sparc64: Add syscall tracepoint support.
  sparc: Stop trying to be so fancy and use __builtin_{memcpy,memset}()
  sparc: Use __builtin_object_size() to validate the buffer size for copy_from_user()
  sparc64: Add some missing __kprobes annotations to kernel fault paths.
  sparc64: Use kprobes_built_in() to avoid ifdefs in fault_64.c
  sparc: Validate that kprobe address is 4-byte aligned.
  sparc64: Don't specify IRQF_SHARED for LDC interrupts.
  sparc64: Fix stack debugging IRQ stack regression.
  sparc64: Fix overly strict range type matching for PCI devices.
2009-12-15 09:00:19 -08:00
Stephen Rothwell 1abff64d49 sparc64: don't export static inline pci_ functions
Exporting an inline function breaks the new assembler-based alphabetical
sorted symbol list.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-12-15 16:28:13 +10:30
Thomas Gleixner 239007b844 genirq: Convert irq_desc.lock to raw_spinlock
Convert locks which cannot be sleeping locks in preempt-rt to
raw_spinlocks.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
2009-12-14 23:55:33 +01:00
Linus Torvalds d0316554d3 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (34 commits)
  m68k: rename global variable vmalloc_end to m68k_vmalloc_end
  percpu: add missing per_cpu_ptr_to_phys() definition for UP
  percpu: Fix kdump failure if booted with percpu_alloc=page
  percpu: make misc percpu symbols unique
  percpu: make percpu symbols in ia64 unique
  percpu: make percpu symbols in powerpc unique
  percpu: make percpu symbols in x86 unique
  percpu: make percpu symbols in xen unique
  percpu: make percpu symbols in cpufreq unique
  percpu: make percpu symbols in oprofile unique
  percpu: make percpu symbols in tracer unique
  percpu: make percpu symbols under kernel/ and mm/ unique
  percpu: remove some sparse warnings
  percpu: make alloc_percpu() handle array types
  vmalloc: fix use of non-existent percpu variable in put_cpu_var()
  this_cpu: Use this_cpu_xx in trace_functions_graph.c
  this_cpu: Use this_cpu_xx for ftrace
  this_cpu: Use this_cpu_xx in nmi handling
  this_cpu: Use this_cpu operations in RCU
  this_cpu: Use this_cpu ops for VM statistics
  ...

Fix up trivial (famous last words) global per-cpu naming conflicts in
	arch/x86/kvm/svm.c
	mm/slab.c
2009-12-14 09:58:24 -08:00
Linus Torvalds aad3bf04dc Merge git://git.kernel.org/pub/scm/linux/kernel/git/viro/mmap
* git://git.kernel.org/pub/scm/linux/kernel/git/viro/mmap:
  Add missing alignment check in arch/score sys_mmap()
  fix broken aliasing checks for MAP_FIXED on sparc32, mips, arm and sh
  Get rid of open-coding in ia64_brk()
  sparc_brk() is not needed anymore
  switch do_brk() to get_unmapped_area()
  Take arch_mmap_check() into get_unmapped_area()
  fix a struct file leak in do_mmap_pgoff()
  Unify sys_mmap*
  Cut hugetlb case early for 32bit on ia64
  arch_mmap_check() on mn10300
  Kill ancient crap in s390 compat mmap
  arm: add arch_mmap_check(), get rid of sys_arm_mremap()
  file ->get_unmapped_area() shouldn't duplicate work of get_unmapped_area()
  kill useless checks in sparc mremap variants
  fix pgoff in "have to relocate" case of mremap()
  fix the arch checks in MREMAP_FIXED case
  fix checks for expand-in-place mremap
  do_mremap() untangling, part 3
  do_mremap() untangling, part 2
  untangling do_mremap(), part 1
2009-12-11 12:23:29 -08:00
Linus Torvalds 11bd04f6f3 Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (109 commits)
  PCI: fix coding style issue in pci_save_state()
  PCI: add pci_request_acs
  PCI: fix BUG_ON triggered by logical PCIe root port removal
  PCI: remove ifdefed pci_cleanup_aer_correct_error_status
  PCI: unconditionally clear AER uncorr status register during cleanup
  x86/PCI: claim SR-IOV BARs in pcibios_allocate_resource
  PCI: portdrv: remove redundant definitions
  PCI: portdrv: remove unnecessary struct pcie_port_data
  PCI: portdrv: minor cleanup for pcie_port_device_register
  PCI: portdrv: add missing irq cleanup
  PCI: portdrv: enable device before irq initialization
  PCI: portdrv: cleanup service irqs initialization
  PCI: portdrv: check capabilities first
  PCI: portdrv: move PME capability check
  PCI: portdrv: remove redundant pcie type calculation
  PCI: portdrv: cleanup pcie_device registration
  PCI: portdrv: remove redundant pcie_port_device_probe
  PCI: Always set prefetchable base/limit upper32 registers
  PCI: read-modify-write the pcie device control register when initiating pcie flr
  PCI: show dma_mask bits in /sys
  ...

Fixed up conflicts in:
	arch/x86/kernel/amd_iommu_init.c
	drivers/pci/dmar.c
	drivers/pci/hotplug/acpiphp_glue.c
2009-12-11 12:18:16 -08:00
Al Viro e77414e0aa fix broken aliasing checks for MAP_FIXED on sparc32, mips, arm and sh
We want addr - (pgoff << PAGE_SHIFT) consistently coloured...

Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11 06:44:59 -05:00
Al Viro 05d72faa6d sparc_brk() is not needed anymore
the checks it's doing are duplicated in sys_brk() and failing
them early makes no sense, AFAICT.

Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11 06:44:58 -05:00
Al Viro f8b7256096 Unify sys_mmap*
New helper - sys_mmap_pgoff(); switch syscalls to using it.

Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11 06:44:29 -05:00
Al Viro c4caa77815 file ->get_unmapped_area() shouldn't duplicate work of get_unmapped_area()
... we should call mm ->get_unmapped_area() instead and let our caller
do the final checks.

Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11 06:34:09 -05:00
Al Viro 0ec62d2909 kill useless checks in sparc mremap variants
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-12-11 06:34:09 -05:00
David S. Miller 7466bd3caa sparc64: Fix clock event multiplier printf format.
The type got changed to u32, so %lx generated warnings
(and thus build failure on sparc64)

Stephen Rothwell fixed it like so:

-	printk("clockevent: mult[%lx] shift[%d]\n",
+	printk("clockevent: mult[%ux] shift[%d]\n",

But that's not a valid transformation, we now get:

clockevent: mult[51539607x] shift[32]

in the logs.

Fix it to use the correct plain "%x" instead.

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-11 02:05:05 -08:00
David S. Miller 6865b7f9dd sparc64: Use clock{source,events}_calc_mult_shift().
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-11 01:27:29 -08:00
David S. Miller e3f4e1cbc3 Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-12-11 01:26:12 -08:00
David S. Miller adfe67ddff sparc64: Use free_bootmem_late() in mdesc_lmb_free().
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-11 01:16:46 -08:00
David S. Miller 121dd5f277 sparc: Add alignment and emulation fault perf events.
This mirrors commit 196f02bf90
(powerpc: perf_event: Add alignment-faults and emulation-faults software events)

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-11 01:07:53 -08:00
David S. Miller c658ad1b4e sparc64: Add syscall tracepoint support.
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-11 00:44:47 -08:00
David S. Miller 936cf25178 sparc: Validate that kprobe address is 4-byte aligned.
Otherwise it isn't a valid instruction address.

This is the sparc equivalent of commit
b46b3d70c9 (kprobes: Checks probe
address is instruction boudary on x86)

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-09 23:57:24 -08:00
David S. Miller 08a036d583 sparc64: Don't specify IRQF_SHARED for LDC interrupts.
IRQF_SHARED and IRQF_DISABLED don't mix.

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-09 23:44:43 -08:00
David S. Miller 4230fa3b89 sparc64: Fix overly strict range type matching for PCI devices.
When we are trying to see if a range property entry applies
to a given address, we are overly strict about the type.

We should only allow I/O ranges for I/O addresses, and only allow
CONFIG space ranges for CONFIG space address.

However for MEM ranges, they come in 32-bit and 64-bit flavors.
And a lack of an exact match is OK if the range is 32-bit and
the address is 64-bit.  We can assign a 64-bit address properly
into a 32-bit parent range just fine.

So allow it.

Reported-by: Patrick Finnegan <pat@computer-refuge.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-09 01:39:09 -08:00
Linus Torvalds 60d8ce2cd6 Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  timers, init: Limit the number of per cpu calibration bootup messages
  posix-cpu-timers: optimize and document timer_create callback
  clockevents: Add missing include to pacify sparse
  x86: vmiclock: Fix printk format
  x86: Fix printk format due to variable type change
  sparc: fix printk for change of variable type
  clocksource/events: Fix fallout of generic code changes
  nohz: Allow 32-bit machines to sleep for more than 2.15 seconds
  nohz: Track last do_timer() cpu
  nohz: Prevent clocksource wrapping during idle
  nohz: Type cast printk argument
  mips: Use generic mult/shift factor calculation for clocks
  clocksource: Provide a generic mult/shift factor calculation
  clockevents: Use u32 for mult and shift factors
  nohz: Introduce arch_needs_cpu
  nohz: Reuse ktime in sub-functions of tick_check_idle.
  time: Remove xtime_cache
  time: Implement logarithmic time accumulation
2009-12-08 19:27:08 -08:00
Linus Torvalds d7fc02c7ba Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1815 commits)
  mac80211: fix reorder buffer release
  iwmc3200wifi: Enable wimax core through module parameter
  iwmc3200wifi: Add wifi-wimax coexistence mode as a module parameter
  iwmc3200wifi: Coex table command does not expect a response
  iwmc3200wifi: Update wiwi priority table
  iwlwifi: driver version track kernel version
  iwlwifi: indicate uCode type when fail dump error/event log
  iwl3945: remove duplicated event logging code
  b43: fix two warnings
  ipw2100: fix rebooting hang with driver loaded
  cfg80211: indent regulatory messages with spaces
  iwmc3200wifi: fix NULL pointer dereference in pmkid update
  mac80211: Fix TX status reporting for injected data frames
  ath9k: enable 2GHz band only if the device supports it
  airo: Fix integer overflow warning
  rt2x00: Fix padding bug on L2PAD devices.
  WE: Fix set events not propagated
  b43legacy: avoid PPC fault during resume
  b43: avoid PPC fault during resume
  tcp: fix a timewait refcnt race
  ...

Fix up conflicts due to sysctl cleanups (dead sysctl_check code and
CTL_UNNUMBERED removed) in
	kernel/sysctl_check.c
	net/ipv4/sysctl_net_ipv4.c
	net/ipv6/addrconf.c
	net/sctp/sysctl.c
2009-12-08 07:55:01 -08:00
Linus Torvalds ee1262dbc6 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6:
  sparc: Set UTS_MACHINE correctly.
  sparc,leon: init_leon srmmu cleanup
  sparc32: Remove early interrupt enable.
  sparc, leon: Added Aeroflex Gaisler entry in manufacturer_info structure
  sparc64: Faster early-boot framebuffer console.
  Revert "sparc: Make atomic locks raw"
  sparc: remove unused nfsd #includes
  sparc: Fixup last users of irq_chip->typename
  Added sparc_leon3_snooping_enabled() and converted extern inline to static inline
  No auxio on LEON
  apbuart: Use of_find_node_by_path to find root node.
  sparc: Replace old style lock initializer
  sparc: Make atomic locks raw
  apbuart: Fix build and missing driver unregister.
  apbuart: Kill dependency on deprecated Sparc-only PROM interfaces.
  apbuart: Fix build warning.
  sparc: Support for GRLIB APBUART serial port
  watchdog: Remove BKL from rio watchdog driver
  sparc: Remove BKL from apc
  sparc,leon: Sparc-Leon SMP support
2009-12-08 07:48:23 -08:00
Kristoffer Glembo fdd98ac96e sparc32: Remove early interrupt enable.
Enabling interrupts at this points causes the warning
"start_kernel(): bug: interrupts were enabled early"
to be printed in start_kernel().

Signed-off-by: Kristoffer Glembo <kristoffer@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-02 22:28:49 -08:00
Kristoffer Glembo 3560f788fe sparc, leon: Added Aeroflex Gaisler entry in manufacturer_info structure
Signed-off-by: Kristoffer Glembo <kristoffer@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-02 22:28:49 -08:00
David S. Miller c57ec52f26 sparc64: Faster early-boot framebuffer console.
Borrow the powerpc bootx text console driver.

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-27 17:33:43 -08:00
Boaz Harrosh 0448f5e884 sparc: remove unused nfsd #includes
Some unused includes removed.

In an effort to cleanup nfsd headers and move private
definitions to source directory.

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-25 15:19:17 -08:00
David S. Miller 3505d1a9fd Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
	drivers/net/sfc/sfe4001.c
	drivers/net/wireless/libertas/cmd.c
	drivers/staging/Kconfig
	drivers/staging/Makefile
	drivers/staging/rtl8187se/Kconfig
	drivers/staging/rtl8192e/Kconfig
2009-11-18 22:19:03 -08:00
Thomas Gleixner 89a7183d08 sparc: Fixup last users of irq_chip->typename
The typename member of struct irq_chip was kept for migration purposes
and is obsolete since more than 2 years. Fix up the leftovers.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-18 05:09:59 -08:00
Eric W. Biederman bb9074ff58 Merge commit 'v2.6.32-rc7'
Resolve the conflict between v2.6.32-rc7 where dn_def_dev_handler
gets a small bug fix and the sysctl tree where I am removing all
sysctl strategy routines.
2009-11-17 01:01:34 -08:00
Stephen Rothwell 621a071f43 sparc: fix printk for change of variable type
The clockevent mult field became a u32.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20091116180118.aa1bf1e4.sfr@canb.auug.org.au>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2009-11-16 11:55:19 +01:00
Kristoffer Glembo c000c71272 No auxio on LEON
Do not probe for auxio register on SPARC LEON.

Signed-off-by: Kristoffer Glembo <kristoffer@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-16 02:54:07 -08:00
David S. Miller 1c9d80ddc6 sparc: Move of_set_property_mutex acquisition outside of devtree_lock grab.
Otherwise we try to sleep with preemption disabled, etc.

Noticed by Thomas Gleixner.

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-08 17:41:20 -08:00
Roel Kluin 88b938e63e sparc64: replace parentheses in pmul()
`>>' has a higher precedence than `?' so src2 evaluated to
either 16 or 0 dependent on the bits set in rs2.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-08 00:26:56 -08:00
Eric W. Biederman 03102a4ded sysctl: sparc Use the compat_sys_sysctl
Now that we have a generic 32bit compatibility implementation
there is no need for sparc to implement it's own.

Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-06 03:53:57 -08:00
Tejun Heo 4c0eec7a86 sparc64/PCI: drop PCI_CACHE_LINE_BYTES
sparc64 is now the only user of PCI_CACHE_LINE_BYTES.  Drop it and set
pci_dfl_cache_line_size from pcibios_init() instead and drop
PCI_CACHE_LINE_BYTES handling from generic pci code.

Orignally-From: David Miller <davem@davemloft.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-11-04 08:47:10 -08:00
Thomas Gleixner 49ab972aea sparc: Remove BKL from apc
commit ab772027 (sparc: arch/sparc/kernel/apc.c to unlocked_ioctl)
added lock/unlock_kernel() to the apc ioctl code.

The code needs no serialization at all. Neither put/get_user nor the
read/write access to the sbus devices require it. Remove BKL.

cycle_kernel_lock() was added during the big BKL pushdown. It should
ensure the serializiation against driver init code. In this case there
is nothing to serialize. Remove it as well.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-02 21:15:59 -08:00
Konrad Eisele 8401707ff6 sparc,leon: Sparc-Leon SMP support
Support SMP for a Sparc-Leon multiprocessor system.
Add Leon specific SMP code to arch/sparc/kernel/leon_smp.c.

Signed-off-by: Konrad Eisele <konrad@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-02 04:19:42 -08:00
David S. Miller c58543c869 sparc64: Set IRQF_DISABLED on LDC channel IRQs.
With lots of virtual devices it's easy to generate a lot of
events and chew up the kernel IRQ stack.

Reported-by: hyl <heyongli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-13 00:49:09 -07:00
Arnaldo Carvalho de Melo a2e2725541 net: Introduce recvmmsg socket syscall
Meaning receive multiple messages, reducing the number of syscalls and
net stack entry/exit operations.

Next patches will introduce mechanisms where protocols that want to
optimize this operation will provide an unlocked_recvmsg operation.

This takes into account comments made by:

. Paul Moore: sock_recvmsg is called only for the first datagram,
  sock_recvmsg_nosec is used for the rest.

. Caitlin Bestler: recvmmsg now has a struct timespec timeout, that
  works in the same fashion as the ppoll one.

  If the underlying protocol returns a datagram with MSG_OOB set, this
  will make recvmmsg return right away with as many datagrams (+ the OOB
  one) it has received so far.

. Rémi Denis-Courmont & Steven Whitehouse: If we receive N < vlen
  datagrams and then recvmsg returns an error, recvmmsg will return
  the successfully received datagrams, store the error and return it
  in the next call.

This paves the way for a subsequent optimization, sk_prot->unlocked_recvmsg,
where we will be able to acquire the lock only at batch start and end, not at
every underlying recvmsg call.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-12 23:40:10 -07:00
Christoph Lameter 494f6a9e12 this_cpu: Use this_cpu_xx in nmi handling
this_cpu_inc/dec reduces the number of instructions needed.

Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
2009-10-12 19:51:49 +09:00
David S. Miller de23cf3c42 sparc64: Fix niagara2 perf IRQ bits.
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-09 00:42:40 -07:00
Linus Torvalds ef790fe022 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc: using HZ needs an include of linux/param.h
  sparc32: convert to asm-generic/hardirq.h
  sparc64: Cache per-cpu %pcr register value in perf code.
  sparc64: Fix comment typo in perf_event.c
  sparc64: Minor coding style fixups in perf code.
  sparc64: Add a basic conflict engine in preparation for multi-counter support.
  sparc64: Increase vmalloc size to fix percpu regressions.
  sparc64: Add initial perf event conflict resolution and checks.
  sparc: Niagara1 perf event support.
  sparc: Add Niagara2 HW cache event support.
  sparc: Support all ultra3 and ultra4 derivatives.
  sparc: Support HW cache events.
2009-10-05 12:06:40 -07:00
David S. Miller d17513889a sparc64: Cache per-cpu %pcr register value in perf code.
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-29 21:27:06 -07:00