when deleting an instance. It also creates a selftest that triggers that bug.
Fix the delayed optimization happening after kprobes boot up self tests
being removed by freeing of init memory.
Comment kprobes on why the delay optimization is not a problem for removal
of modules, to keep other developers from searching that riddle.
Fix another rcu isn't watching in stack trace tracing.
Naveen N. Rao (4):
ftrace: Simplify glob handling in unregister_ftrace_function_probe_func()
ftrace/instances: Clear function triggers when removing instances
selftests/ftrace: Fix bashisms
selftests/ftrace: Add test to remove instance with active event triggers
Steven Rostedt (1):
tracing: Move postpone selftests to core from early_initcall
Steven Rostedt (VMware) (3):
ftrace: Remove #ifdef from code and add clear_ftrace_function_probes() stub
kprobes: Document how optimized kprobes are removed from module unload
tracing: Make sure RCU is watching before calling a stack trace
Thomas Gleixner (1):
tracing/kprobes: Enforce kprobes teardown after testing
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Merge tag 'trace-v4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
- Fix a bug caused by not cleaning up the new instance unique triggers
when deleting an instance. It also creates a selftest that triggers
that bug.
- Fix the delayed optimization happening after kprobes boot up self
tests being removed by freeing of init memory.
- Comment kprobes on why the delay optimization is not a problem for
removal of modules, to keep other developers from searching that
riddle.
- Fix another case of rcu not watching in stack trace tracing.
* tag 'trace-v4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Make sure RCU is watching before calling a stack trace
kprobes: Document how optimized kprobes are removed from module unload
selftests/ftrace: Add test to remove instance with active event triggers
selftests/ftrace: Fix bashisms
ftrace: Remove #ifdef from code and add clear_ftrace_function_probes() stub
ftrace/instances: Clear function triggers when removing instances
ftrace: Simplify glob handling in unregister_ftrace_function_probe_func()
tracing/kprobes: Enforce kprobes teardown after testing
tracing: Move postpone selftests to core from early_initcall
Pull block fixes from Jens Axboe:
"A small collection of fixes that should go into this cycle.
- a pull request from Christoph for NVMe, which ended up being
manually applied to avoid pulling in newer bits in master. Mostly
fibre channel fixes from James, but also a few fixes from Jon and
Vijay
- a pull request from Konrad, with just a single fix for xen-blkback
from Gustavo.
- a fuseblk bdi fix from Jan, fixing a regression in this series with
the dynamic backing devices.
- a blktrace fix from Shaohua, replacing sscanf() with kstrtoull().
- a request leak fix for drbd from Lars, fixing a regression in the
last series with the kref changes. This will go to stable as well"
* 'for-linus' of git://git.kernel.dk/linux-block:
nvmet: release the sq ref on rdma read errors
nvmet-fc: remove target cpu scheduling flag
nvme-fc: stop queues on error detection
nvme-fc: require target or discovery role for fc-nvme targets
nvme-fc: correct port role bits
nvme: unmap CMB and remove sysfs file in reset path
blktrace: fix integer parse
fuseblk: Fix warning in super_setup_bdi_name()
block: xen-blkback: add null check to avoid null pointer dereference
drbd: fix request leak introduced by locking/atomic, kref: Kill kref_sub()
FC Port roles is a bit mask, not individual values.
Correct nvme definitions to unique bits.
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Here are a number of small USB fixes for 4.12-rc2
Most of them come from Johan, in his valiant quest to fix up all drivers
that could be affected by "malicious" USB devices. There's also some
fixes for more "obscure" drivers to handle some of the vmalloc stack
fallout (which for USB drivers, was always the case, but very few people
actually ran those systems...)
Other than that, the normal set of xhci and gadget and musb driver fixes
as well.
All have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-4.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are a number of small USB fixes for 4.12-rc2
Most of them come from Johan, in his valiant quest to fix up all
drivers that could be affected by "malicious" USB devices. There's
also some fixes for more "obscure" drivers to handle some of the
vmalloc stack fallout (which for USB drivers, was always the case, but
very few people actually ran those systems...)
Other than that, the normal set of xhci and gadget and musb driver
fixes as well.
All have been in linux-next with no reported issues"
* tag 'usb-4.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (42 commits)
usb: musb: tusb6010_omap: Do not reset the other direction's packet size
usb: musb: Fix trying to suspend while active for OTG configurations
usb: host: xhci-plat: propagate return value of platform_get_irq()
xhci: Fix command ring stop regression in 4.11
xhci: remove GFP_DMA flag from allocation
USB: xhci: fix lock-inversion problem
usb: host: xhci-ring: don't need to clear interrupt pending for MSI enabled hcd
usb: host: xhci-mem: allocate zeroed Scratchpad Buffer
xhci: apply PME_STUCK_QUIRK and MISSING_CAS quirk for Denverton
usb: xhci: trace URB before giving it back instead of after
USB: serial: qcserial: add more Lenovo EM74xx device IDs
USB: host: xhci: use max-port define
USB: hub: fix SS max number of ports
USB: hub: fix non-SS hub-descriptor handling
USB: hub: fix SS hub-descriptor handling
USB: usbip: fix nonconforming hub descriptor
USB: gadget: dummy_hcd: fix hub-descriptor removable fields
doc-rst: fixed kernel-doc directives in usb/typec.rst
USB: core: of: document reference taken by companion helper
USB: ehci-platform: fix companion-device leak
...
Pull libnvdimm fixes from Dan Williams:
"A couple of compile fixes.
With the removal of the ->direct_access() method from
block_device_operations in favor of a new dax_device + dax_operations
we broke two configurations.
The CONFIG_BLOCK=n case is fixed by compiling out the block+dax
helpers in the dax core. Configurations with FS_DAX=n EXT4=y / XFS=y
and DAX=m fail due to the helpers the builtin filesystem needs being
in a module, so we stub out the helpers in the FS_DAX=n case."
* 'libnvdimm-for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
dax, xfs, ext4: compile out iomap-dax paths in the FS_DAX=n case
dax: fix false CONFIG_BLOCK dependency
We had a small batch of fixes before -rc1, but here is a larger one. It
contains a backmerge of 4.12-rc1 since some of the downstream branches we
merge had that as base; at the same time we already had merged contents
before -rc1 and rebase wasn't the right solution.
A mix of random smaller fixes and a few things worth pointing out:
- We've started telling people to avoid cross-tree shared branches if all
they're doing is picking up one or two DT-used constants from a
shared include file, and instead to use the numeric values on first
submission. Follow-up moving over to symbolic names are sent in right
after -rc1, i.e. here. It's only a few minor patches of this type.
- Linus Walleij and others are resurrecting the 'Gemini' platform, and
wanted a cut-down platform-specific defconfig for it. So I picked that
up for them.
- Rob Herring ran 'savedefconfig' on arm64, it's a bit churny but it helps
people to prepare patches since it's a pain when defconfig and current
savedefconfig contents differs too much.
- Devicetree additions for some pinctrl drivers for Armada that were
merged this window. I'd have preferred to see those earlier but it's not
a huge deail.
The biggest change worth pointing out though since it's touching other
parts of the tree: We added prefixes to be used when cross-including
DT contents between arm64 and arm, allowing someone to #include
<arm/foo.dtsi> from arm64, and likewise. As part of that, we needed
arm/foo.dtsi to work on arm as well. The way I suggested this to Heiko
resulted in a recursive symlink.
Instead, I've now moved it out of arch/*/boot/dts/include, into a shared
location under scripts/dtc. While I was at it, I consolidated so all
architectures now behave the same way in this manner.
Rob Herring (DT maintainer) has acked it. I cc:d most other arch
maintainers but nobody seems to care much; it doesn't really affect them
since functionality is unchanged for them by default.
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Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"We had a small batch of fixes before -rc1, but here is a larger one.
It contains a backmerge of 4.12-rc1 since some of the downstream
branches we merge had that as base; at the same time we already had
merged contents before -rc1 and rebase wasn't the right solution.
A mix of random smaller fixes and a few things worth pointing out:
- We've started telling people to avoid cross-tree shared branches if
all they're doing is picking up one or two DT-used constants from a
shared include file, and instead to use the numeric values on first
submission. Follow-up moving over to symbolic names are sent in
right after -rc1, i.e. here. It's only a few minor patches of this
type.
- Linus Walleij and others are resurrecting the 'Gemini' platform,
and wanted a cut-down platform-specific defconfig for it. So I
picked that up for them.
- Rob Herring ran 'savedefconfig' on arm64, it's a bit churny but it
helps people to prepare patches since it's a pain when defconfig
and current savedefconfig contents differs too much.
- Devicetree additions for some pinctrl drivers for Armada that were
merged this window. I'd have preferred to see those earlier but
it's not a huge deail.
The biggest change worth pointing out though since it's touching other
parts of the tree: We added prefixes to be used when cross-including
DT contents between arm64 and arm, allowing someone to #include
<arm/foo.dtsi> from arm64, and likewise. As part of that, we needed
arm/foo.dtsi to work on arm as well. The way I suggested this to Heiko
resulted in a recursive symlink.
Instead, I've now moved it out of arch/*/boot/dts/include, into a
shared location under scripts/dtc. While I was at it, I consolidated
so all architectures now behave the same way in this manner.
Rob Herring (DT maintainer) has acked it. I cc:d most other arch
maintainers but nobody seems to care much; it doesn't really affect
them since functionality is unchanged for them by default"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (29 commits)
arm64: dts: rockchip: fix include reference
firmware: ti_sci: fix strncat length check
ARM: remove duplicate 'const' annotations'
arm64: defconfig: enable options needed for QCom DB410c board
arm64: defconfig: sync with savedefconfig
ARM: configs: add a gemini defconfig
devicetree: Move include prefixes from arch to separate directory
ARM: dts: dra7: Reduce cpu thermal shutdown temperature
memory: omap-gpmc: Fix debug output for access width
ARM: dts: LogicPD Torpedo: Fix camera pin mux
ARM: dts: omap4: enable CEC pin for Pandaboard A4 and ES
ARM: dts: gta04: fix polarity of clocks for mcbsp4
ARM: dts: dra7: Add power hold and power controller properties to palmas
soc: imx: add PM dependency for IMX7_PM_DOMAINS
ARM: dts: imx6sx-sdb: Remove OPP override
ARM: dts: imx53-qsrb: Pulldown PMIC IRQ pin
soc: bcm: brcmstb: Correctly match 7435 SoC
tee: add ARM_SMCCC dependency
ARM: omap2+: make omap4_get_cpu1_ns_pa_addr declaration usable
ARM64: dts: mediatek: configure some fixed mmc parameters
...
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Merge tag 'v4.12-rc1' into fixes
We've received a few fixes branches with -rc1 as base, but our contents was
still at pre-rc1. Merge it in expliticly to make 'git merge --log' clear on
hat was actually merged.
Signed-off-by: Olof Johansson <olof@lixom.net>
According to xHCI spec Figure 30: Interrupt Throttle Flow Diagram
If PCI Message Signaled Interrupts (MSI or MSI-X) are enabled,
then the assertion of the Interrupt Pending (IP) flag in Figure 30
generates a PCI Dword write. The IP flag is automatically cleared
by the completion of the PCI write.
the MSI enabled HCs don't need to clear interrupt pending bit, but
hcd->irq = 0 doesn't equal to MSI enabled HCD. At some Dual-role
controller software designs, it sets hcd->irq as 0 to avoid HCD
requesting interrupt, and they want to decide when to call usb_hcd_irq
by software.
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Enabling the tracer selftest triggers occasionally the warning in
text_poke(), which warns when the to be modified page is not marked
reserved.
The reason is that the tracer selftest installs kprobes on functions marked
__init for testing. These probes are removed after the tests, but that
removal schedules the delayed kprobes_optimizer work, which will do the
actual text poke. If the work is executed after the init text is freed,
then the warning triggers. The bug can be reproduced reliably when the work
delay is increased.
Flush the optimizer work and wait for the optimizing/unoptimizing lists to
become empty before returning from the kprobes tracer selftest. That
ensures that all operations which were queued due to the probes removal
have completed.
Link: http://lkml.kernel.org/r/20170516094802.76a468bb@gandalf.local.home
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: stable@vger.kernel.org
Fixes: 6274de498 ("kprobes: Support delayed unoptimizing")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Pull networking fixes from David Miller:
1) Track alignment in BPF verifier so that legitimate programs won't be
rejected on !CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS architectures.
2) Make tail calls work properly in arm64 BPF JIT, from Deniel
Borkmann.
3) Make the configuration and semantics Generic XDP make more sense and
don't allow both generic XDP and a driver specific instance to be
active at the same time. Also from Daniel.
4) Don't crash on resume in xen-netfront, from Vitaly Kuznetsov.
5) Fix use-after-free in VRF driver, from Gao Feng.
6) Use netdev_alloc_skb_ip_align() to avoid unaligned IP headers in
qca_spi driver, from Stefan Wahren.
7) Always run cleanup routines in BPF samples when we get SIGTERM, from
Andy Gospodarek.
8) The mdio phy code should bring PHYs out of reset using the shared
GPIO lines before invoking bus->reset(). From Florian Fainelli.
9) Some USB descriptor access endian fixes in various drivers from
Johan Hovold.
10) Handle PAUSE advertisements properly in mlx5 driver, from Gal
Pressman.
11) Fix reversed test in mlx5e_setup_tc(), from Saeed Mahameed.
12) Cure netdev leak in AF_PACKET when using timestamping via control
messages. From Douglas Caetano dos Santos.
13) netcp doesn't support HWTSTAMP_FILTER_ALl, reject it. From Miroslav
Lichvar.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (52 commits)
ldmvsw: stop the clean timer at beginning of remove
ldmvsw: unregistering netdev before disable hardware
net: netcp: fix check of requested timestamping filter
ipv6: avoid dad-failures for addresses with NODAD
qed: Fix uninitialized data in aRFS infrastructure
mdio: mux: fix device_node_continue.cocci warnings
net/packet: fix missing net_device reference release
net/mlx4_core: Use min3 to select number of MSI-X vectors
macvlan: Fix performance issues with vlan tagged packets
net: stmmac: use correct pointer when printing normal descriptor ring
net/mlx5: Use underlay QPN from the root name space
net/mlx5e: IPoIB, Only support regular RQ for now
net/mlx5e: Fix setup TC ndo
net/mlx5e: Fix ethtool pause support and advertise reporting
net/mlx5e: Use the correct pause values for ethtool advertising
vmxnet3: ensure that adapter is in proper state during force_close
sfc: revert changes to NIC revision numbers
net: ch9200: add missing USB-descriptor endianness conversions
net: irda: irda-usb: fix firmware name on big-endian hosts
net: dsa: mv88e6xxx: add default case to switch
...
Root flow table is dynamically changed by the underlying flow steering
layer, and IPoIB/ULPs have no idea what will be the root flow table in
the future, hence we need a dynamic infrastructure to move Underlay QPs
with the root flow table.
Fixes: b3ba51498b ("net/mlx5: Refactor create flow table method to accept underlay QP")
Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Tetsuo reports:
fs/built-in.o: In function `xfs_file_iomap_end':
xfs_iomap.c:(.text+0xe0ef9): undefined reference to `put_dax'
fs/built-in.o: In function `xfs_file_iomap_begin':
xfs_iomap.c:(.text+0xe1a7f): undefined reference to `dax_get_by_host'
make: *** [vmlinux] Error 1
$ grep DAX .config
CONFIG_DAX=m
# CONFIG_DEV_DAX is not set
# CONFIG_FS_DAX is not set
When FS_DAX=n we can/must throw away the dax code in filesystems.
Implement 'fs_' versions of dax_get_by_host() and put_dax() that are
nops in the FS_DAX=n case.
Cc: <linux-xfs@vger.kernel.org>
Cc: <linux-ext4@vger.kernel.org>
Cc: Jan Kara <jack@suse.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Fixes: ef51042472 ("block, dax: move 'select DAX' from BLOCK to FS_DAX")
Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Merge misc fixes from Andrew Morton:
"15 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
mm, docs: update memory.stat description with workingset* entries
mm: vmscan: scan until it finds eligible pages
mm, thp: copying user pages must schedule on collapse
dax: fix PMD data corruption when fault races with write
dax: fix data corruption when fault races with write
ext4: return to starting transaction in ext4_dax_huge_fault()
mm: fix data corruption due to stale mmap reads
dax: prevent invalidation of mapped DAX entries
Tigran has moved
mm, vmalloc: fix vmalloc users tracking properly
mm/khugepaged: add missed tracepoint for collapse_huge_page_swapin
gcov: support GCC 7.1
mm, vmstat: Remove spurious WARN() during zoneinfo print
time: delete current_fs_time()
hwpoison, memcg: forcibly uncharge LRU pages
Patch series "mm,dax: Fix data corruption due to mmap inconsistency",
v4.
This series fixes data corruption that can happen for DAX mounts when
page faults race with write(2) and as a result page tables get out of
sync with block mappings in the filesystem and thus data seen through
mmap is different from data seen through read(2).
The series passes testing with t_mmap_stale test program from Ross and
also other mmap related tests on DAX filesystem.
This patch (of 4):
dax_invalidate_mapping_entry() currently removes DAX exceptional entries
only if they are clean and unlocked. This is done via:
invalidate_mapping_pages()
invalidate_exceptional_entry()
dax_invalidate_mapping_entry()
However, for page cache pages removed in invalidate_mapping_pages()
there is an additional criteria which is that the page must not be
mapped. This is noted in the comments above invalidate_mapping_pages()
and is checked in invalidate_inode_page().
For DAX entries this means that we can can end up in a situation where a
DAX exceptional entry, either a huge zero page or a regular DAX entry,
could end up mapped but without an associated radix tree entry. This is
inconsistent with the rest of the DAX code and with what happens in the
page cache case.
We aren't able to unmap the DAX exceptional entry because according to
its comments invalidate_mapping_pages() isn't allowed to block, and
unmap_mapping_range() takes a write lock on the mapping->i_mmap_rwsem.
Since we essentially never have unmapped DAX entries to evict from the
radix tree, just remove dax_invalidate_mapping_entry().
Fixes: c6dcf52c23 ("mm: Invalidate DAX radix tree entries only if appropriate")
Link: http://lkml.kernel.org/r/20170510085419.27601-2-jack@suse.cz
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Reported-by: Jan Kara <jack@suse.cz>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: <stable@vger.kernel.org> [4.10+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 1f5307b1e0 ("mm, vmalloc: properly track vmalloc users") has
pulled asm/pgtable.h include dependency to linux/vmalloc.h and that
turned out to be a bad idea for some architectures. E.g. m68k fails
with
In file included from arch/m68k/include/asm/pgtable_mm.h:145:0,
from arch/m68k/include/asm/pgtable.h:4,
from include/linux/vmalloc.h:9,
from arch/m68k/kernel/module.c:9:
arch/m68k/include/asm/mcf_pgtable.h: In function 'nocache_page':
>> arch/m68k/include/asm/mcf_pgtable.h:339:43: error: 'init_mm' undeclared (first use in this function)
#define pgd_offset_k(address) pgd_offset(&init_mm, address)
as spotted by kernel build bot. nios2 fails for other reason
In file included from include/asm-generic/io.h:767:0,
from arch/nios2/include/asm/io.h:61,
from include/linux/io.h:25,
from arch/nios2/include/asm/pgtable.h:18,
from include/linux/mm.h:70,
from include/linux/pid_namespace.h:6,
from include/linux/ptrace.h:9,
from arch/nios2/include/uapi/asm/elf.h:23,
from arch/nios2/include/asm/elf.h:22,
from include/linux/elf.h:4,
from include/linux/module.h:15,
from init/main.c:16:
include/linux/vmalloc.h: In function '__vmalloc_node_flags':
include/linux/vmalloc.h:99:40: error: 'PAGE_KERNEL' undeclared (first use in this function); did you mean 'GFP_KERNEL'?
which is due to the newly added #include <asm/pgtable.h>, which on nios2
includes <linux/io.h> and thus <asm/io.h> and <asm-generic/io.h> which
again includes <linux/vmalloc.h>.
Tweaking that around just turns out a bigger headache than necessary.
This patch reverts 1f5307b1e0 and reimplements the original fix in a
different way. __vmalloc_node_flags can stay static inline which will
cover vmalloc* functions. We only have one external user
(kvmalloc_node) and we can export __vmalloc_node_flags_caller and
provide the caller directly. This is much simpler and it doesn't really
need any games with header files.
[akpm@linux-foundation.org: coding-style fixes]
[mhocko@kernel.org: revert old comment]
Link: http://lkml.kernel.org/r/20170509211054.GB16325@dhcp22.suse.cz
Fixes: 1f5307b1e0 ("mm, vmalloc: properly track vmalloc users")
Link: http://lkml.kernel.org/r/20170509153702.GR6481@dhcp22.suse.cz
Signed-off-by: Michal Hocko <mhocko@suse.com>
Cc: Tobias Klauser <tklauser@distanz.ch>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
All uses of the current_fs_time() function have been replaced by other
time interfaces.
And, its use cases can be fulfilled by current_time() or ktime_get_*
variants.
Link: http://lkml.kernel.org/r/1491613030-11599-13-git-send-email-deepa.kernel@gmail.com
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull libnvdimm fixes from Dan Williams:
"Incremental fixes and a small feature addition on top of the main
libnvdimm 4.12 pull request:
- Geert noticed that tinyconfig was bloated by BLOCK selecting DAX.
The size regression is fixed by moving all dax helpers into the
dax-core and only specifying "select DAX" for FS_DAX and
dax-capable drivers. He also asked for clarification of the
NR_DEV_DAX config option which, on closer look, does not need to be
a config option at all. Mike also throws in a DEV_DAX_PMEM fixup
for good measure.
- Ben's attention to detail on -stable patch submissions caught a
case where the recent fixes to arch_copy_from_iter_pmem() missed a
condition where we strand dirty data in the cache. This is tagged
for -stable and will also be included in the rework of the pmem api
to a proposed {memcpy,copy_user}_flushcache() interface for 4.13.
- Vishal adds a feature that missed the initial pull due to pending
review feedback. It allows the kernel to clear media errors when
initializing a BTT (atomic sector update driver) instance on a pmem
namespace.
- Ross noticed that the dax_device + dax_operations conversion broke
__dax_zero_page_range(). The nvdimm unit tests fail to check this
path, but xfstests immediately trips over it. No excuse for missing
this before submitting the 4.12 pull request.
These all pass the nvdimm unit tests and an xfstests spot check. The
set has received a build success notification from the kbuild robot"
* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
filesystem-dax: fix broken __dax_zero_page_range() conversion
libnvdimm, btt: ensure that initializing metadata clears poison
libnvdimm: add an atomic vs process context flag to rw_bytes
x86, pmem: Fix cache flushing for iovec write < 8 bytes
device-dax: kill NR_DEV_DAX
block, dax: move "select DAX" from BLOCK to FS_DAX
device-dax: Tell kbuild DEV_DAX_PMEM depends on DEV_DAX
* New battery driver for AXP20X and AXP22X PMICs
* Improve max17042_battery for usage on x86
* Misc small cleanups & fixes
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Merge tag 'for-v4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply
Pull more power-supply updates from Sebastian Reichel:
"The power-supply subsystem has a few more changes for the v4.12 merge
window:
- New battery driver for AXP20X and AXP22X PMICs
- Improve max17042_battery for usage on x86
- Misc small cleanups & fixes"
* tag 'for-v4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (34 commits)
power: supply: cpcap-charger: Keep trickle charger bits disabled
power: supply: cpcap-charger: Fix enable for 3.8V charge setting
power: supply: cpcap-charger: Fix charge voltage configuration
power: supply: cpcap-charger: Fix charger name
power: supply: twl4030-charger: make twl4030_bci_property_is_writeable static
power: supply: sbs-battery: Add alert callback
mailmap: add Sebastian Reichel
power: supply: avoid unused twl4030-madc.h
power: supply: sbs-battery: Correct supply status with current draw
power: supply: sbs-battery: Don't ignore the first external power change
power: supply: pda_power: move from timer to delayed_work
power: supply: max17042_battery: Add support for the SCOPE property
power: supply: max17042_battery: Add support for the CHARGE_NOW property
power: supply: max17042_battery: Add support for the CHARGE_FULL_DESIGN property
power: supply: max17042_battery: mAh readings depend on r_sns value
power: supply: max17042_battery: Add support for the VOLT_MIN property
power: supply: max17042_battery: Add support for the TECHNOLOGY attribute
power: supply: max17042_battery: Add external_power_changed callback
power: supply: max17042_battery: Add support for the STATUS property
power: supply: max17042_battery: Add default platform_data fallback data
...
Pull thermal management updates from Zhang Rui:
- Fix a problem where orderly_shutdown() is called for multiple times
due to multiple critical overheating events raised in a short period
by platform thermal driver. (Keerthy)
- Introduce a backup thermal shutdown mechanism, which invokes
kernel_power_off()/emergency_restart() directly, after
orderly_shutdown() being issued for certain amount of time(specified
via Kconfig). This is useful in certain conditions that userspace may
be unable to power off the system in a clean manner and leaves the
system in a critical state, like in the middle of driver probing
phase. (Keerthy)
- Introduce a new interface in thermal devfreq_cooling code so that the
driver can provide more precise data regarding actual power to the
thermal governor every time the power budget is calculated. (Lukasz
Luba)
- Introduce BCM 2835 soc thermal driver and northstar thermal driver,
within a new sub-folder. (Rafał Miłecki)
- Introduce DA9062/61 thermal driver. (Steve Twiss)
- Remove non-DT booting on TI-SoC driver. Also add support to fetching
coefficients from DT. (Keerthy)
- Refactorf RCAR Gen3 thermal driver. (Niklas Söderlund)
- Small fix on MTK and intel-soc-dts thermal driver. (Dawei Chien,
Brian Bian)
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (25 commits)
thermal: core: Add a back up thermal shutdown mechanism
thermal: core: Allow orderly_poweroff to be called only once
Thermal: Intel SoC DTS: Change interrupt request behavior
trace: thermal: add another parameter 'power' to the tracing function
thermal: devfreq_cooling: add new interface for direct power read
thermal: devfreq_cooling: refactor code and add get_voltage function
thermal: mt8173: minor mtk_thermal.c cleanups
thermal: bcm2835: move to the broadcom subdirectory
thermal: broadcom: ns: specify myself as MODULE_AUTHOR
thermal: da9062/61: Thermal junction temperature monitoring driver
Documentation: devicetree: thermal: da9062/61 TJUNC temperature binding
thermal: broadcom: add Northstar thermal driver
dt-bindings: thermal: add support for Broadcom's Northstar thermal
thermal: bcm2835: add thermal driver for bcm2835 SoC
dt-bindings: Add thermal zone to bcm2835-thermal example
thermal: rcar_gen3_thermal: add suspend and resume support
thermal: rcar_gen3_thermal: store device match data in private structure
thermal: rcar_gen3_thermal: enable hardware interrupts for trip points
thermal: rcar_gen3_thermal: record and check number of TSCs found
thermal: rcar_gen3_thermal: check that TSC exists before memory allocation
...
Pull misc vfs updates from Al Viro:
"Making sure that something like a referral point won't end up as pwd
or root.
The main part is the last commit (fixing mntns_install()); that one
fixes a hard-to-hit race. The fchdir() commit is making fchdir(2) a
bit more robust - it should be impossible to get opened files (even
O_PATH ones) for referral points in the first place, so the existing
checks are OK, but checking the same thing as in chdir(2) is just as
cheap.
The path_init() commit removes a redundant check that shouldn't have
been there in the first place"
* 'work.sane_pwd' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
make sure that mntns_install() doesn't end up with referral for root
path_init(): don't bother with checking MAY_EXEC for LOOKUP_ROOT
make sure that fchdir() won't accept referral points, etc.
Highlights include:
- rework the Linux page table geometry to lower memory usage on 64-bit Book3S
(IBM chips) using the Hash MMU.
- support for a new device tree binding for discovering CPU features on future
firmwares.
- Freescale updates from Scott: "Includes a fix for a powerpc/next mm regression
on 64e, a fix for a kernel hang on 64e when using a debugger inside a
relocated kernel, a qman fix, and misc qe improvements."
Thanks to:
Christophe Leroy, Gavin Shan, Horia Geantă, LiuHailong, Nicholas Piggin, Roy
Pledge, Scott Wood, Valentin Longchamp.
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Merge tag 'powerpc-4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull more powerpc updates from Michael Ellerman:
"The change to the Linux page table geometry was delayed for more
testing with 16G pages, and there's the new CPU features stuff which
just needed one more polish before going in. Plus a few changes from
Scott which came in a bit late. And then various fixes, mostly minor.
Summary highlights:
- rework the Linux page table geometry to lower memory usage on
64-bit Book3S (IBM chips) using the Hash MMU.
- support for a new device tree binding for discovering CPU features
on future firmwares.
- Freescale updates from Scott:
"Includes a fix for a powerpc/next mm regression on 64e, a fix for
a kernel hang on 64e when using a debugger inside a relocated
kernel, a qman fix, and misc qe improvements."
Thanks to: Christophe Leroy, Gavin Shan, Horia Geantă, LiuHailong,
Nicholas Piggin, Roy Pledge, Scott Wood, Valentin Longchamp"
* tag 'powerpc-4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/64s: Support new device tree binding for discovering CPU features
powerpc: Don't print cpu_spec->cpu_name if it's NULL
of/fdt: introduce of_scan_flat_dt_subnodes and of_get_flat_dt_phandle
powerpc/64s: Fix unnecessary machine check handler relocation branch
powerpc/mm/book3s/64: Rework page table geometry for lower memory usage
powerpc: Fix distclean with Makefile.postlink
powerpc/64e: Don't place the stack beyond TASK_SIZE
powerpc/powernv: Block PCI config access on BCM5718 during EEH recovery
powerpc/8xx: Adding support of IRQ in MPC8xx GPIO
soc/fsl/qbman: Disable IRQs for deferred QBMan work
soc/fsl/qe: add EXPORT_SYMBOL for the 2 qe_tdm functions
soc/fsl/qe: only apply QE_General4 workaround on affected SoCs
soc/fsl/qe: round brg_freq to 1kHz granularity
soc/fsl/qe: get rid of immrbar_virt_to_phys()
net: ethernet: ucc_geth: fix MEM_PART_MURAM mode
powerpc/64e: Fix hang when debugging programs with relocated kernel
While working on the iproute2 generic XDP frontend, I noticed that
as of right now it's possible to have native *and* generic XDP
programs loaded both at the same time for the case when a driver
supports native XDP.
The intended model for generic XDP from b5cdae3291 ("net: Generic
XDP") is, however, that only one out of the two can be present at
once which is also indicated as such in the XDP netlink dump part.
The main rationale for generic XDP is to ease accessibility (in
case a driver does not yet have XDP support) and to generically
provide a semantical model as an example for driver developers
wanting to add XDP support. The generic XDP option for an XDP
aware driver can still be useful for comparing and testing both
implementations.
However, it is not intended to have a second XDP processing stage
or layer with exactly the same functionality of the first native
stage. Only reason could be to have a partial fallback for future
XDP features that are not supported yet in the native implementation
and we probably also shouldn't strive for such fallback and instead
encourage native feature support in the first place. Given there's
currently no such fallback issue or use case, lets not go there yet
if we don't need to.
Therefore, change semantics for loading XDP and bail out if the
user tries to load a generic XDP program when a native one is
present and vice versa. Another alternative to bailing out would
be to handle the transition from one flavor to another gracefully,
but that would require to bring the device down, exchange both
types of programs, and bring it up again in order to avoid a tiny
window where a packet could hit both hooks. Given this complicates
the logic for just a debugging feature in the native case, I went
with the simpler variant.
For the dump, remove IFLA_XDP_FLAGS that was added with b5cdae3291
and reuse IFLA_XDP_ATTACHED for indicating the mode. Dumping all
or just a subset of flags that were used for loading the XDP prog
is suboptimal in the long run since not all flags are useful for
dumping and if we start to reuse the same flag definitions for
load and dump, then we'll waste bit space. What we really just
want is to dump the mode for now.
Current IFLA_XDP_ATTACHED semantics are: nothing was installed (0),
a program is running at the native driver layer (1). Thus, add a
mode that says that a program is running at generic XDP layer (2).
Applications will handle this fine in that older binaries will
just indicate that something is attached at XDP layer, effectively
this is similar to IFLA_XDP_FLAGS attr that we would have had
modulo the redundancy.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add a new field, "prog_flags", and an initial flag value
BPF_F_STRICT_ALIGNMENT.
When set, the verifier will enforce strict pointer alignment
regardless of the setting of CONFIG_EFFICIENT_UNALIGNED_ACCESS.
The verifier, in this mode, will also use a fixed value of "2" in
place of NET_IP_ALIGN.
This facilitates test cases that will exercise and validate this part
of the verifier even when run on architectures where alignment doesn't
matter.
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Currently if we add only constant values to pointers we can fully
validate the alignment, and properly check if we need to reject the
program on !CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS architectures.
However, once an unknown value is introduced we only allow byte sized
memory accesses which is too restrictive.
Add logic to track the known minimum alignment of register values,
and propagate this state into registers containing pointers.
The most common paradigm that makes use of this new logic is computing
the transport header using the IP header length field. For example:
struct ethhdr *ep = skb->data;
struct iphdr *iph = (struct iphdr *) (ep + 1);
struct tcphdr *th;
...
n = iph->ihl;
th = ((void *)iph + (n * 4));
port = th->dest;
The existing code will reject the load of th->dest because it cannot
validate that the alignment is at least 2 once "n * 4" is added the
the packet pointer.
In the new code, the register holding "n * 4" will have a reg->min_align
value of 4, because any value multiplied by 4 will be at least 4 byte
aligned. (actually, the eBPF code emitted by the compiler in this case
is most likely to use a shift left by 2, but the end result is identical)
At the critical addition:
th = ((void *)iph + (n * 4));
The register holding 'th' will start with reg->off value of 14. The
pointer addition will transform that reg into something that looks like:
reg->aux_off = 14
reg->aux_off_align = 4
Next, the verifier will look at the th->dest load, and it will see
a load offset of 2, and first check:
if (reg->aux_off_align % size)
which will pass because aux_off_align is 4. reg_off will be computed:
reg_off = reg->off;
...
reg_off += reg->aux_off;
plus we have off==2, and it will thus check:
if ((NET_IP_ALIGN + reg_off + off) % size != 0)
which evaluates to:
if ((NET_IP_ALIGN + 14 + 2) % size != 0)
On strict alignment architectures, NET_IP_ALIGN is 2, thus:
if ((2 + 14 + 2) % size != 0)
which passes.
These pointer transformations and checks work regardless of whether
the constant offset or the variable with known alignment is added
first to the pointer register.
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
- fix handling of probing errors in omapfb (Arvind Yadav)
- remove incorrect __exit markups in few drivers (Dmitry Torokhov)
- fix boot time logo support for drivers using deferred probe (Takeshi Kihara)
- fix DMA allocation size for ARM CLCD driver (Liam Beguin)
- add support for specifying size via xenstore in xen-frontfb (Juergen Gross)
- support for AUS mode in imxfb driver (Martin Kaiser)
- fix buffer on stack usage in udlfb driver (Maksim Salau)
- probe failure path fixup in sm501fb driver (Alexey Khoroshilov)
- fix config dependency loop for stifb driver (Arnd Bergmann)
- misc cleanups
(Joe Perches, Christophe Leroy, Karim Eshapa, Pushkar Jambhlekar)
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Merge tag 'fbdev-v4.12' of git://github.com/bzolnier/linux
Pull fbdev updates from Bartlomiej Zolnierkiewicz:
"There is nothing really major here, just a couple of small bugfixes,
improvements and cleanups.
- fix handling of probing errors in omapfb (Arvind Yadav)
- remove incorrect __exit markups in few drivers (Dmitry Torokhov)
- fix boot time logo support for drivers using deferred probe
(Takeshi Kihara)
- fix DMA allocation size for ARM CLCD driver (Liam Beguin)
- add support for specifying size via xenstore in xen-frontfb
(Juergen Gross)
- support for AUS mode in imxfb driver (Martin Kaiser)
- fix buffer on stack usage in udlfb driver (Maksim Salau)
- probe failure path fixup in sm501fb driver (Alexey Khoroshilov)
- fix config dependency loop for stifb driver (Arnd Bergmann)
- misc cleanups (Joe Perches, Christophe Leroy, Karim Eshapa, Pushkar
Jambhlekar)"
* tag 'fbdev-v4.12' of git://github.com/bzolnier/linux:
fbdev: sti: don't select CONFIG_VT
drivers/video/fbdev/omap/lcd_mipid.c: Use time comparison kernel macros
sm501fb: don't return zero on failure path in sm501fb_start()
video: fbdev: udlfb: Fix buffer on stack
video: console: Remove reference to CONFIG_8xx
dt-bindings: display: imx: entry for AUS mode
video: fbdev: imxfb: support AUS mode
drivers/video/fbdev: Fixing coding guidelines in acornfb.c
xen, fbfront: add support for specifying size via xenstore
video: ARM CLCD: fix dma allocation size
drivers/video: Convert remaining uses of pr_warning to pr_warn
video/logo: tidyup fb_logo_late_init initcall timing
video: fbdev: i810: remove incorrect __exit markups
video: fbdev: pmag-aa-fb: remove incorrect __exit markups
video: fbdev: pmagb-b-fb: remove incorrect __exit markups
video: fbdev: pmag-ba-fb: remove incorrect __exit markups
omapfb: dss: Handle return errors in dss_init_ports()
NAND, from Boris:
"""
- some minor fixes/improvements on existing drivers (fsmc, gpio, ifc,
davinci, brcmnand, omap)
- a huge cleanup/rework of the denali driver accompanied with core
fixes/improvements to simplify the driver code
- a complete rewrite of the atmel driver to support new DT bindings
make future evolution easier
- the addition of per-vendor detection/initialization steps to avoid
extending the nand_ids table with more extended-id entries
"""
SPI NOR, from Cyrille:
"""
- fixes in the hisi SPI controller driver.
- fixes in the intel SPI controller driver.
- fixes in the Mediatek SPI controller driver.
- fixes to some SPI flash memories not supported the Chip Erase command.
- add support to some new memory parts (Winbond, Macronix, Micron, ESMT).
- add new driver for the STM32 QSPI controller.
"""
And a few fixes for Gemini and Versatile platforms on physmap-of
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Merge tag 'for-linus-20170510' of git://git.infradead.org/linux-mtd
Pull MTD updates from Brian Norris:
"NAND, from Boris:
- some minor fixes/improvements on existing drivers (fsmc, gpio, ifc,
davinci, brcmnand, omap)
- a huge cleanup/rework of the denali driver accompanied with core
fixes/improvements to simplify the driver code
- a complete rewrite of the atmel driver to support new DT bindings
make future evolution easier
- the addition of per-vendor detection/initialization steps to avoid
extending the nand_ids table with more extended-id entries
SPI NOR, from Cyrille:
- fixes in the hisi, intel and Mediatek SPI controller drivers
- fixes to some SPI flash memories not supporting the Chip Erase
command.
- add support to some new memory parts (Winbond, Macronix, Micron,
ESMT).
- add new driver for the STM32 QSPI controller
And a few fixes for Gemini and Versatile platforms on physmap-of"
* tag 'for-linus-20170510' of git://git.infradead.org/linux-mtd: (100 commits)
MAINTAINERS: Update NAND subsystem git repositories
mtd: nand: gpio: update binding
mtd: nand: add ooblayout for old hamming layout
mtd: oxnas_nand: Allocating more than necessary in probe()
dt-bindings: mtd: Document the STM32 QSPI bindings
mtd: mtk-nor: set controller's address width according to nor flash
mtd: spi-nor: add driver for STM32 quad spi flash controller
mtd: nand: brcmnand: Check flash #WP pin status before nand erase/program
mtd: nand: davinci: add comment on NAND subpage write status on keystone
mtd: nand: omap2: Fix partition creation via cmdline mtdparts
mtd: nand: NULL terminate a of_device_id table
mtd: nand: Fix a couple error codes
mtd: nand: allow drivers to request minimum alignment for passed buffer
mtd: nand: allocate aligned buffers if NAND_OWN_BUFFERS is unset
mtd: nand: denali: allow to override revision number
mtd: nand: denali_dt: use pdev instead of ofdev for platform_device
mtd: nand: denali_dt: remove dma-mask DT property
mtd: nand: denali: support 64bit capable DMA engine
mtd: nand: denali_dt: enable HW_ECC_FIXUP for Altera SOCFPGA variant
mtd: nand: denali: support HW_ECC_FIXUP capability
...
A change to function pointers that was meant to address a sparse warning
turned out to cause hundreds of new gcc-7 warnings:
include/linux/of_irq.h:11:13: error: type qualifiers ignored on function return type [-Werror=ignored-qualifiers]
drivers/of/of_reserved_mem.c: In function '__reserved_mem_init_node':
drivers/of/of_reserved_mem.c:200:7: error: type qualifiers ignored on function return type [-Werror=ignored-qualifiers]
int const (*initfn)(struct reserved_mem *rmem) = i->data;
Turns out the sparse warnings were spurious and have been fixed in
upstream sparse since 0.5.0 in commit "sparse: treat function pointers
as pointers to const data".
This partially reverts commit 17a70355ea.
Fixes: 17a70355ea ("of: fix sparse warnings in fdt, irq, reserved mem, and resolver code")
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rob Herring <robh@kernel.org>
nsio_rw_bytes can clear media errors, but this cannot be done while we
are in an atomic context due to locking within ACPI. From the BTT,
->rw_bytes may be called either from atomic or process context depending
on whether the calls happen during initialization or during IO.
During init, we want to ensure error clearing happens, and the flag
marking process context allows nsio_rw_bytes to do that. When called
during IO, we're in atomic context, and error clearing can be skipped.
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
- Improve Clang support
- Clean up various Makefiles
- Improve build log visibility (objtool, alpha, ia64)
- Improve compiler flag evaluation for better build performance
- Fix GCC version-dependent warning
- Fix genksyms
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Merge tag 'kbuild-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- improve Clang support
- clean up various Makefiles
- improve build log visibility (objtool, alpha, ia64)
- improve compiler flag evaluation for better build performance
- fix GCC version-dependent warning
- fix genksyms
* tag 'kbuild-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (23 commits)
kbuild: dtbinst: remove unnecessary __dtbs_install_prep target
ia64: beatify build log for gate.so and gate-syms.o
alpha: make short build log available for division routines
alpha: merge build rules of division routines
alpha: add $(src)/ rather than $(obj)/ to make source file path
Makefile: evaluate LDFLAGS_BUILD_ID only once
objtool: make it visible in make V=1 output
kbuild: clang: add -no-integrated-as to KBUILD_[AC]FLAGS
kbuild: Add support to generate LLVM assembly files
kbuild: Add better clang cross build support
kbuild: drop -Wno-unknown-warning-option from clang options
kbuild: fix asm-offset generation to work with clang
kbuild: consolidate redundant sed script ASM offset generation
frv: Use OFFSET macro in DEF_*REG()
kbuild: avoid conflict between -ffunction-sections and -pg on gcc-4.7
kbuild: Consolidate header generation from ASM offset information
kbuild: use -Oz instead of -Os when using clang
kbuild, LLVMLinux: Add -Werror to cc-option to support clang
Kbuild: make designated_init attribute fatal
kbuild: drop unneeded patterns '.*.orig' and '.*.rej' from distclean
...
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Merge tag 'hwparam-20170420' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
Pull hw lockdown support from David Howells:
"Annotation of module parameters that configure hardware resources
including ioports, iomem addresses, irq lines and dma channels.
This allows a future patch to prohibit the use of such module
parameters to prevent that hardware from being abused to gain access
to the running kernel image as part of locking the kernel down under
UEFI secure boot conditions.
Annotations are made by changing:
module_param(n, t, p)
module_param_named(n, v, t, p)
module_param_array(n, t, m, p)
to:
module_param_hw(n, t, hwtype, p)
module_param_hw_named(n, v, t, hwtype, p)
module_param_hw_array(n, t, hwtype, m, p)
where the module parameter refers to a hardware setting
hwtype specifies the type of the resource being configured. This can
be one of:
ioport Module parameter configures an I/O port
iomem Module parameter configures an I/O mem address
ioport_or_iomem Module parameter could be either (runtime set)
irq Module parameter configures an I/O port
dma Module parameter configures a DMA channel
dma_addr Module parameter configures a DMA buffer address
other Module parameter configures some other value
Note that the hwtype is compile checked, but not currently stored (the
lockdown code probably won't require it). It is, however, there for
future use.
A bonus is that the hwtype can also be used for grepping.
The intention is for the kernel to ignore or reject attempts to set
annotated module parameters if lockdown is enabled. This applies to
options passed on the boot command line, passed to insmod/modprobe or
direct twiddling in /sys/module/ parameter files.
The module initialisation then needs to handle the parameter not being
set, by (1) giving an error, (2) probing for a value or (3) using a
reasonable default.
What I can't do is just reject a module out of hand because it may
take a hardware setting in the module parameters. Some important
modules, some ipmi stuff for instance, both probe for hardware and
allow hardware to be manually specified; if the driver is aborts with
any error, you don't get any ipmi hardware.
Further, trying to do this entirely in the module initialisation code
doesn't protect against sysfs twiddling.
[!] Note that in and of itself, this series of patches should have no
effect on the the size of the kernel or code execution - that is
left to a patch in the next series to effect. It does mark
annotated kernel parameters with a KERNEL_PARAM_FL_HWPARAM flag in
an already existing field"
* tag 'hwparam-20170420' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs: (38 commits)
Annotate hardware config module parameters in sound/pci/
Annotate hardware config module parameters in sound/oss/
Annotate hardware config module parameters in sound/isa/
Annotate hardware config module parameters in sound/drivers/
Annotate hardware config module parameters in fs/pstore/
Annotate hardware config module parameters in drivers/watchdog/
Annotate hardware config module parameters in drivers/video/
Annotate hardware config module parameters in drivers/tty/
Annotate hardware config module parameters in drivers/staging/vme/
Annotate hardware config module parameters in drivers/staging/speakup/
Annotate hardware config module parameters in drivers/staging/media/
Annotate hardware config module parameters in drivers/scsi/
Annotate hardware config module parameters in drivers/pcmcia/
Annotate hardware config module parameters in drivers/pci/hotplug/
Annotate hardware config module parameters in drivers/parport/
Annotate hardware config module parameters in drivers/net/wireless/
Annotate hardware config module parameters in drivers/net/wan/
Annotate hardware config module parameters in drivers/net/irda/
Annotate hardware config module parameters in drivers/net/hamradio/
Annotate hardware config module parameters in drivers/net/ethernet/
...
to me not catching up as quickly on patch review than anything else.
Overall it seems normal though, a few small changes to the core, mostly
small non-critical fixes here and there as well as driver updates for new
and existing hardware support. The biggest things are the TI clk driver
rework to lay the groundwork for clkctrl support in the next merge window
and the AmLogic audio/graphics clk support.
Core:
* clk_possible_parents debugfs file so we know which parents a clk
could possibly have
* Fix to make clk rate change notifiers stop on the first failure instead
of continuing
New Drivers:
* Mediatek MT6797 SoCs
* hi655x PMIC clks
* AmLogic Meson SoC i2s and spdif audio clks and Mali graphics clks
* Allwinner H5 SoCs and PRCM hardware
Updates:
* Nvidia Tegra T210 cleanups and non-critical fixes
* TI OMAP cleanups in preparation for clkctrl support
* Trivial fixes like kcalloc(), devm_* conversions, and seq_puts()
* ZTE zx296718 SoC VGA clks
* Rockchip clk-ids, fixups, and rename of rk1108 to rv1108
* Support for IDT VersaClock 5P49V5935
* Renesas R-Car H3 and M3-W IMR clks and ES2.0 rev of R-Car H3 support
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Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk updates from Stephen Boyd:
"Sort of on the quieter side this time, which is probably due more to
me not catching up as quickly on patch review than anything else.
Overall it seems normal though, a few small changes to the core,
mostly small non-critical fixes here and there as well as driver
updates for new and existing hardware support.
The biggest things are the TI clk driver rework to lay the groundwork
for clkctrl support in the next merge window and the AmLogic
audio/graphics clk support.
Core:
- clk_possible_parents debugfs file so we know which parents a clk
could possibly have
- Fix to make clk rate change notifiers stop on the first failure
instead of continuing
New Drivers:
- Mediatek MT6797 SoCs
- hi655x PMIC clks
- AmLogic Meson SoC i2s and spdif audio clks and Mali graphics clks
- Allwinner H5 SoCs and PRCM hardware
Updates:
- Nvidia Tegra T210 cleanups and non-critical fixes
- TI OMAP cleanups in preparation for clkctrl support
- trivial fixes like kcalloc(), devm_* conversions, and seq_puts()
- ZTE zx296718 SoC VGA clks
- Rockchip clk-ids, fixups, and rename of rk1108 to rv1108
- IDT VersaClock 5P49V5935 support
- Renesas R-Car H3 and M3-W IMR clks and ES2.0 rev of R-Car H3
support"
* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (151 commits)
clk: x86: pmc-atom: Checking for IS_ERR() instead of NULL
clk: ti: divider: try to fix ti_clk_register_divider
clk: mvebu: Use kcalloc() in two functions
clk: mvebu: Use kcalloc() in of_cpu_clk_setup()
clk: nomadik: Delete error messages for a failed memory allocation in two functions
clk: nomadik: Use seq_puts() in nomadik_src_clk_show()
clk: Improve a size determination in two functions
clk: Replace four seq_printf() calls by seq_putc()
clk: si5351: Delete an error message for a failed memory allocation in si5351_i2c_probe()
clk: si5351: Use devm_kcalloc() in si5351_i2c_probe()
clk: at91: Use kcalloc() in of_at91_clk_pll_get_characteristics()
reset: mediatek: Add MT2701 ethsys reset controller include file
clk: mediatek: add mt2701 ethernet reset
clk: hi6220: Add the hi655x's pmic clock
clk: ti: fix building without legacy omap3
clk: ti: fix linker error with !SOC_OMAP4
clk: hi3620: Fix a typo in one variable name
clk: hi3620: Delete error messages for a failed memory allocation in two functions
clk: hi3620: Use kcalloc() in hi3620_mmc_clk_init()
clk: hisilicon: Delete error messages for failed memory allocations in hisi_clk_init()
...
bugfixes.
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Merge tag 'nfsd-4.12' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
"Another RDMA update from Chuck Lever, and a bunch of miscellaneous
bugfixes"
* tag 'nfsd-4.12' of git://linux-nfs.org/~bfields/linux: (26 commits)
nfsd: Fix up the "supattr_exclcreat" attributes
nfsd: encoders mustn't use unitialized values in error cases
nfsd: fix undefined behavior in nfsd4_layout_verify
lockd: fix lockd shutdown race
NFSv4: Fix callback server shutdown
SUNRPC: Refactor svc_set_num_threads()
NFSv4.x/callback: Create the callback service through svc_create_pooled
lockd: remove redundant check on block
svcrdma: Clean out old XDR encoders
svcrdma: Remove the req_map cache
svcrdma: Remove unused RDMA Write completion handler
svcrdma: Reduce size of sge array in struct svc_rdma_op_ctxt
svcrdma: Clean up RPC-over-RDMA backchannel reply processing
svcrdma: Report Write/Reply chunk overruns
svcrdma: Clean up RDMA_ERROR path
svcrdma: Use rdma_rw API in RPC reply path
svcrdma: Introduce local rdma_rw API helpers
svcrdma: Clean up svc_rdma_get_inv_rkey()
svcrdma: Add helper to save pages under I/O
svcrdma: Eliminate RPCRDMA_SQ_DEPTH_MULT
...
Highlights include:
Stable bugfixes:
- Fix use after free in write error path
- Use GFP_NOIO for two allocations in writeback
- Fix a hang in OPEN related to server reboot
- Check the result of nfs4_pnfs_ds_connect
- Fix an rcu lock leak
Features:
- Removal of the unmaintained and unused OSD pNFS layout
- Cleanup and removal of lots of unnecessary dprintk()s
- Cleanup and removal of some memory failure paths now that
GFP_NOFS is guaranteed to never fail.
- Remove the v3-only data server limitation on pNFS/flexfiles
Bugfixes:
- RPC/RDMA connection handling bugfixes
- Copy offload: fixes to ensure the copied data is COMMITed to disk.
- Readdir: switch back to using the ->iterate VFS interface
- File locking fixes from Ben Coddington
- Various use-after-free and deadlock issues in pNFS
- Write path bugfixes
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Merge tag 'nfs-for-4.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust:
"Highlights include:
Stable bugfixes:
- Fix use after free in write error path
- Use GFP_NOIO for two allocations in writeback
- Fix a hang in OPEN related to server reboot
- Check the result of nfs4_pnfs_ds_connect
- Fix an rcu lock leak
Features:
- Removal of the unmaintained and unused OSD pNFS layout
- Cleanup and removal of lots of unnecessary dprintk()s
- Cleanup and removal of some memory failure paths now that GFP_NOFS
is guaranteed to never fail.
- Remove the v3-only data server limitation on pNFS/flexfiles
Bugfixes:
- RPC/RDMA connection handling bugfixes
- Copy offload: fixes to ensure the copied data is COMMITed to disk.
- Readdir: switch back to using the ->iterate VFS interface
- File locking fixes from Ben Coddington
- Various use-after-free and deadlock issues in pNFS
- Write path bugfixes"
* tag 'nfs-for-4.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (89 commits)
pNFS/flexfiles: Always attempt to call layoutstats when flexfiles is enabled
NFSv4.1: Work around a Linux server bug...
NFS append COMMIT after synchronous COPY
NFSv4: Fix exclusive create attributes encoding
NFSv4: Fix an rcu lock leak
nfs: use kmap/kunmap directly
NFS: always treat the invocation of nfs_getattr as cache hit when noac is on
Fix nfs_client refcounting if kmalloc fails in nfs4_proc_exchange_id and nfs4_proc_async_renew
NFSv4.1: RECLAIM_COMPLETE must handle NFS4ERR_CONN_NOT_BOUND_TO_SESSION
pNFS: Fix NULL dereference in pnfs_generic_alloc_ds_commits
pNFS: Fix a typo in pnfs_generic_alloc_ds_commits
pNFS: Fix a deadlock when coalescing writes and returning the layout
pNFS: Don't clear the layout return info if there are segments to return
pNFS: Ensure we commit the layout if it has been invalidated
pNFS: Don't send COMMITs to the DSes if the server invalidated our layout
pNFS/flexfiles: Fix up the ff_layout_write_pagelist failure path
pNFS: Ensure we check layout validity before marking it for return
NFS4.1 handle interrupted slot reuse from ERR_DELAY
NFSv4: check return value of xdr_inline_decode
nfs/filelayout: fix NULL pointer dereference in fl_pnfs_update_layout()
...
This is a dependency for the following fix
* tee/initial-merge:
arm64: dt: hikey: Add optee node
Documentation: tee subsystem and op-tee driver
tee: add OP-TEE driver
tee: generic TEE subsystem
dt/bindings: add bindings for optee
A bunch of changes to virtio, most affecting virtio net.
ptr_ring batched zeroing - first of batching enhancements
that seems ready.
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
Pull virtio updates from Michael Tsirkin:
"Fixes, cleanups, performance
A bunch of changes to virtio, most affecting virtio net. Also ptr_ring
batched zeroing - first of batching enhancements that seems ready."
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
s390/virtio: change maintainership
tools/virtio: fix spelling mistake: "wakeus" -> "wakeups"
virtio_net: tidy a couple debug statements
ptr_ring: support testing different batching sizes
ringtest: support test specific parameters
ptr_ring: batch ring zeroing
virtio: virtio_driver doc
virtio_net: don't reset twice on XDP on/off
virtio_net: fix support for small rings
virtio_net: reduce alignment for buffers
virtio_net: rework mergeable buffer handling
virtio_net: allow specifying context for rx
virtio: allow extra context per descriptor
tools/virtio: fix build breakage
virtio: add context flag to find vqs
virtio: wrap find_vqs
ringtest: fix an assert statement
* ARM: bugfixes; moved shared 32-bit/64-bit files to virt/kvm/arm;
support for saving/restoring virtual ITS state to userspace
* PPC: XIVE (eXternal Interrupt Virtualization Engine) support
* x86: nVMX improvements, including emulated page modification logging
(PML) which brings nice performance improvements on some workloads
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull more KVM updates from Paolo Bonzini:
"ARM:
- bugfixes
- moved shared 32-bit/64-bit files to virt/kvm/arm
- support for saving/restoring virtual ITS state to userspace
PPC:
- XIVE (eXternal Interrupt Virtualization Engine) support
x86:
- nVMX improvements, including emulated page modification logging
(PML) which brings nice performance improvements on some workloads"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (45 commits)
KVM: arm/arm64: vgic-its: Cleanup after failed ITT restore
KVM: arm/arm64: Don't call map_resources when restoring ITS tables
KVM: arm/arm64: Register ITS iodev when setting base address
KVM: arm/arm64: Get rid of its->initialized field
KVM: arm/arm64: Register iodevs when setting redist base and creating VCPUs
KVM: arm/arm64: Slightly rework kvm_vgic_addr
KVM: arm/arm64: Make vgic_v3_check_base more broadly usable
KVM: arm/arm64: Refactor vgic_register_redist_iodevs
KVM: Add kvm_vcpu_get_idx to get vcpu index in kvm->vcpus
nVMX: Advertise PML to L1 hypervisor
nVMX: Implement emulated Page Modification Logging
kvm: x86: Add a hook for arch specific dirty logging emulation
kvm: nVMX: Validate CR3 target count on nested VM-entry
KVM: set no_llseek in stat_fops_per_vm
KVM: arm/arm64: vgic: Rename kvm_vgic_vcpu_init to kvm_vgic_vcpu_enable
KVM: arm/arm64: Clarification and relaxation to ITS save/restore ABI
KVM: arm64: vgic-v3: KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES
KVM: arm64: vgic-its: Fix pending table sync
KVM: arm64: vgic-its: ITT save and restore
KVM: arm64: vgic-its: Device table save/restore
...
This branch introduces a generic TEE framework in the kernel, to handle
trusted environemtns (security coprocessor or software implementations
such as OP-TEE/TrustZone). I'm sending it separately from the other
arm-soc driver changes to give it a little more visibility, once
the subsystem is merged, we will likely keep this in the arm₋soc
drivers branch or have the maintainers submit pull requests directly,
depending on the patch volume.
I have reviewed earlier versions in the past, and have reviewed
the latest version in person during Linaro Connect BUD17.
Here is my overall assessment of the subsystem:
* There is clearly demand for this, both for the generic
infrastructure and the specific OP-TEE implementation.
* The code has gone through a large number of reviews,
and the review comments have all been addressed, but
the reviews were not coming up with serious issues any more
and nobody volunteered to vouch for the quality.
* The user space ioctl interface is sufficient to work with the
OP-TEE driver, and it should in principle work with other
TEE implementations that follow the GlobalPlatform[1] standards,
but it might need to be extended in minor ways depending on
specific requirements of future TEE implementations
* The main downside of the API to me is how the user space
is tied to the TEE implementation in hardware or firmware,
but uses a generic way to communicate with it. This seems
to be an inherent problem with what it is trying to do,
and I could not come up with any better solution than what
is implemented here.
For a detailed history of the patch series, see
https://lkml.org/lkml/2017/3/10/1277
Conflicts: needs a fixup after the drm tree was merged, see
https://patchwork.kernel.org/patch/9691679/
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Merge tag 'armsoc-tee' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull TEE driver infrastructure and OP-TEE drivers from Arnd Bergmann:
"This introduces a generic TEE framework in the kernel, to handle
trusted environemtns (security coprocessor or software implementations
such as OP-TEE/TrustZone). I'm sending it separately from the other
arm-soc driver changes to give it a little more visibility, once the
subsystem is merged, we will likely keep this in the arm₋soc drivers
branch or have the maintainers submit pull requests directly,
depending on the patch volume.
I have reviewed earlier versions in the past, and have reviewed the
latest version in person during Linaro Connect BUD17.
Here is my overall assessment of the subsystem:
- There is clearly demand for this, both for the generic
infrastructure and the specific OP-TEE implementation.
- The code has gone through a large number of reviews, and the review
comments have all been addressed, but the reviews were not coming
up with serious issues any more and nobody volunteered to vouch for
the quality.
- The user space ioctl interface is sufficient to work with the
OP-TEE driver, and it should in principle work with other TEE
implementations that follow the GlobalPlatform[1] standards, but it
might need to be extended in minor ways depending on specific
requirements of future TEE implementations
- The main downside of the API to me is how the user space is tied to
the TEE implementation in hardware or firmware, but uses a generic
way to communicate with it. This seems to be an inherent problem
with what it is trying to do, and I could not come up with any
better solution than what is implemented here.
For a detailed history of the patch series, see
https://lkml.org/lkml/2017/3/10/1277"
* tag 'armsoc-tee' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
arm64: dt: hikey: Add optee node
Documentation: tee subsystem and op-tee driver
tee: add OP-TEE driver
tee: generic TEE subsystem
dt/bindings: add bindings for optee
Pull RCU updates from Ingo Molnar:
"The main changes are:
- Debloat RCU headers
- Parallelize SRCU callback handling (plus overlapping patches)
- Improve the performance of Tree SRCU on a CPU-hotplug stress test
- Documentation updates
- Miscellaneous fixes"
* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (74 commits)
rcu: Open-code the rcu_cblist_n_lazy_cbs() function
rcu: Open-code the rcu_cblist_n_cbs() function
rcu: Open-code the rcu_cblist_empty() function
rcu: Separately compile large rcu_segcblist functions
srcu: Debloat the <linux/rcu_segcblist.h> header
srcu: Adjust default auto-expediting holdoff
srcu: Specify auto-expedite holdoff time
srcu: Expedite first synchronize_srcu() when idle
srcu: Expedited grace periods with reduced memory contention
srcu: Make rcutorture writer stalls print SRCU GP state
srcu: Exact tracking of srcu_data structures containing callbacks
srcu: Make SRCU be built by default
srcu: Fix Kconfig botch when SRCU not selected
rcu: Make non-preemptive schedule be Tasks RCU quiescent state
srcu: Expedite srcu_schedule_cbs_snp() callback invocation
srcu: Parallelize callback handling
kvm: Move srcu_struct fields to end of struct kvm
rcu: Fix typo in PER_RCU_NODE_PERIOD header comment
rcu: Use true/false in assignment to bool
rcu: Use bool value directly
...
- Add Intel Gemini Lake CPU IDs to the intel_idle and intel_rapl
drivers (David Box).
- Add a NULL pointer check to the cpuidle core to prevent it from
crashing on platforms with incomplete cpuidle configuration (Fei
Li).
- Fix DT-related documentation in the generic power domains (genpd)
framework and add a MAINTAINERS entry for DT-related material in
genpd (Viresh Kumar).
- Update the system suspend/resume infrastructure to improve the
handling of aborts of suspend transitions in progress in the
wakeup framework and rework the suspend-to-idle core loop to make
it possible to filter out spurious wakeup events (specifically the
ones coming from ACPI) without resuming all the way up to user
space every time (Rafael Wysocki).
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Merge tag 'pm-extra-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"These add new CPU IDs to a couple of drivers, fix a possible NULL
pointer dereference in the cpuidle core, update DT-related things in
the generic power domains framework and finally update the
suspend/resume infrastructure to improve the handling of wakeups from
suspend-to-idle.
Specifics:
- Add Intel Gemini Lake CPU IDs to the intel_idle and intel_rapl
drivers (David Box).
- Add a NULL pointer check to the cpuidle core to prevent it from
crashing on platforms with incomplete cpuidle configuration (Fei
Li).
- Fix DT-related documentation in the generic power domains (genpd)
framework and add a MAINTAINERS entry for DT-related material in
genpd (Viresh Kumar).
- Update the system suspend/resume infrastructure to improve the
handling of aborts of suspend transitions in progress in the wakeup
framework and rework the suspend-to-idle core loop to make it
possible to filter out spurious wakeup events (specifically the
ones coming from ACPI) without resuming all the way up to user
space every time (Rafael Wysocki)"
* tag 'pm-extra-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / sleep: Ignore spurious SCI wakeups from suspend-to-idle
PM / wakeup: Integrate mechanism to abort transitions in progress
x86/intel_idle: add Gemini Lake support
cpuidle: check dev before usage in cpuidle_use_deepest_state()
powercap: intel_rapl: Add support for Gemini Lake
PM / Domains: Add DT file to MAINTAINERS
PM / Domains: Fix DT example
lock transfers from myself and the long awaited -ENOSPC handling series
from Jeff. The former will allow rbd users to take advantage of
exclusive lock's built-in blacklist/break-lock functionality while
staying in control of who owns the lock. With the latter in place, we
will abort filesystem writes on -ENOSPC instead of having them block
indefinitely.
Beyond that we've got the usual pile of filesystem fixes from Zheng,
some refcount_t conversion patches from Elena and a patch for an
ancient open() flags handling bug from Alexander.
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Merge tag 'ceph-for-4.12-rc1' of git://github.com/ceph/ceph-client
Pull ceph updates from Ilya Dryomov:
"The two main items are support for disabling automatic rbd exclusive
lock transfers from myself and the long awaited -ENOSPC handling
series from Jeff.
The former will allow rbd users to take advantage of exclusive lock's
built-in blacklist/break-lock functionality while staying in control
of who owns the lock. With the latter in place, we will abort
filesystem writes on -ENOSPC instead of having them block
indefinitely.
Beyond that we've got the usual pile of filesystem fixes from Zheng,
some refcount_t conversion patches from Elena and a patch for an
ancient open() flags handling bug from Alexander"
* tag 'ceph-for-4.12-rc1' of git://github.com/ceph/ceph-client: (31 commits)
ceph: fix memory leak in __ceph_setxattr()
ceph: fix file open flags on ppc64
ceph: choose readdir frag based on previous readdir reply
rbd: exclusive map option
rbd: return ResponseMessage result from rbd_handle_request_lock()
rbd: kill rbd_is_lock_supported()
rbd: support updating the lock cookie without releasing the lock
rbd: store lock cookie
rbd: ignore unlock errors
rbd: fix error handling around rbd_init_disk()
rbd: move rbd_unregister_watch() call into rbd_dev_image_release()
rbd: move rbd_dev_destroy() call out of rbd_dev_image_release()
ceph: when seeing write errors on an inode, switch to sync writes
Revert "ceph: SetPageError() for writeback pages if writepages fails"
ceph: handle epoch barriers in cap messages
libceph: add an epoch_barrier field to struct ceph_osd_client
libceph: abort already submitted but abortable requests when map or pool goes full
libceph: allow requests to return immediately on full conditions if caller wishes
libceph: remove req->r_replay_version
ceph: make seeky readdir more efficient
...
* Provide dummy rcar_rst_read_mode_pins() for compile-testing
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Merge tag 'renesas-fixes-for-v4.12' of https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into fixes
Pull "Renesas ARM Based SoC Fixes for v4.12" from Simon Horman:
* Provide dummy rcar_rst_read_mode_pins() for compile-testing
* tag 'renesas-fixes-for-v4.12' of https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
soc: renesas: Provide dummy rcar_rst_read_mode_pins() for compile-testing
This time again a smaller update consisting of:
- support for TI DA8xx dma controller and updates to the cppi driver
- updates on bunch of drivers like xilinx, pl08x, stm32-dma, mv_xor, ioat,
dmatest
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Merge tag 'dmaengine-4.12-rc1' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
"This time again a smaller update consisting of:
- support for TI DA8xx dma controller and updates to the cppi driver
- updates on bunch of drivers like xilinx, pl08x, stm32-dma, mv_xor,
ioat, dmatest"
* tag 'dmaengine-4.12-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (35 commits)
dmaengine: pl08x: remove lock documentation
dmaengine: pl08x: fix pl08x_dma_chan_state documentation
dmaengine: pl08x: Use the BIT() macro consistently
dmaengine: pl080: Fix some missing kerneldoc
dmaengine: pl080: Cut some unused defines
dmaengine: dmatest: Add check for supported buffer count (sg_buffers)
dmaengine: dmatest: Select DMA_ENGINE_RAID as its needed for the slave_sg test
dmaengine: virt-dma: Convert to use list_for_each_entry_safe()
dma-debug: use offset_in_page() macro
dmaengine: mv_xor: use offset_in_page() macro
dmaengine: dmatest: use offset_in_page() macro
dmaengine: sun4i: fix invalid argument
dmaengine: ioat: use setup_timer
dmaengine: cppi41: Fix an Oops happening in cppi41_dma_probe()
dmaengine: pl330: remove pdata based initialization
dmaengine: cppi: fix build error due to bad variable
dmaengine: imx-sdma: add 1ms delay to ensure SDMA channel is stopped
dmaengine: cppi41: use managed functions devm_*()
dmaengine: cppi41: fix cppi41_dma_tx_status() logic
dmaengine: qcom_hidma: pause the channel on shutdown
...
This includes:
* Some code optimizations for the Intel VT-d driver
* Code to switch off a previously enabled Intel IOMMU
* Support for 'struct iommu_device' for OMAP, Rockchip and
Mediatek IOMMUs
* Some header optimizations for IOMMU core code headers and a
few fixes that became necessary in other parts of the kernel
because of that
* ACPI/IORT updates and fixes
* Some Exynos IOMMU optimizations
* Code updates for the IOMMU dma-api code to bring it closer to
use per-cpu iova caches
* New command-line option to set default domain type allocated
by the iommu core code
* Another command line option to allow the Intel IOMMU switched
off in a tboot environment
* ARM/SMMU: TLB sync optimisations for SMMUv2, Support for using
an IDENTITY domain in conjunction with DMA ops, Support for
SMR masking, Support for 16-bit ASIDs (was previously broken)
* Various other small fixes and improvements
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Merge tag 'iommu-updates-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU updates from Joerg Roedel:
- code optimizations for the Intel VT-d driver
- ability to switch off a previously enabled Intel IOMMU
- support for 'struct iommu_device' for OMAP, Rockchip and Mediatek
IOMMUs
- header optimizations for IOMMU core code headers and a few fixes that
became necessary in other parts of the kernel because of that
- ACPI/IORT updates and fixes
- Exynos IOMMU optimizations
- updates for the IOMMU dma-api code to bring it closer to use per-cpu
iova caches
- new command-line option to set default domain type allocated by the
iommu core code
- another command line option to allow the Intel IOMMU switched off in
a tboot environment
- ARM/SMMU: TLB sync optimisations for SMMUv2, Support for using an
IDENTITY domain in conjunction with DMA ops, Support for SMR masking,
Support for 16-bit ASIDs (was previously broken)
- various other small fixes and improvements
* tag 'iommu-updates-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (63 commits)
soc/qbman: Move dma-mapping.h include to qman_priv.h
soc/qbman: Fix implicit header dependency now causing build fails
iommu: Remove trace-events include from iommu.h
iommu: Remove pci.h include from trace/events/iommu.h
arm: dma-mapping: Don't override dma_ops in arch_setup_dma_ops()
ACPI/IORT: Fix CONFIG_IOMMU_API dependency
iommu/vt-d: Don't print the failure message when booting non-kdump kernel
iommu: Move report_iommu_fault() to iommu.c
iommu: Include device.h in iommu.h
x86, iommu/vt-d: Add an option to disable Intel IOMMU force on
iommu/arm-smmu: Return IOVA in iova_to_phys when SMMU is bypassed
iommu/arm-smmu: Correct sid to mask
iommu/amd: Fix incorrect error handling in amd_iommu_bind_pasid()
iommu: Make iommu_bus_notifier return NOTIFY_DONE rather than error code
omap3isp: Remove iommu_group related code
iommu/omap: Add iommu-group support
iommu/omap: Make use of 'struct iommu_device'
iommu/omap: Store iommu_dev pointer in arch_data
iommu/omap: Move data structures to omap-iommu.h
iommu/omap: Drop legacy-style device support
...
* pm-domains:
PM / Domains: Add DT file to MAINTAINERS
PM / Domains: Fix DT example
* pm-cpuidle:
x86/intel_idle: add Gemini Lake support
cpuidle: check dev before usage in cpuidle_use_deepest_state()
* pm-sleep:
ACPI / sleep: Ignore spurious SCI wakeups from suspend-to-idle
PM / wakeup: Integrate mechanism to abort transitions in progress
* powercap:
powercap: intel_rapl: Add support for Gemini Lake
Driver updates for ARM SoCs.
* Reset subsystem, merged through arm-soc by tradition:
- Make bool drivers explicitly non-modular
- New support for i.MX7 and Arria10 reset controllers
* PATA driver for Palmchip BK371 (acked by Tejun)
* Power domain drivers for i.MX (GPC, GPCv2)
- Moved out of mach-imx for GPC
- Bunch of tweaks, fixes, etc
* PMC support for Tegra186
* SoC detection support for Renesas RZ/G1H and RZ/G1N
* Move Tegra flow controller driver from mach directory to drivers/soc
- (Power management / CPU power driver)
* Misc smaller tweaks for other platforms
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Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver updates from Olof Johansson:
"Driver updates for ARM SoCs:
Reset subsystem, merged through arm-soc by tradition:
- Make bool drivers explicitly non-modular
- New support for i.MX7 and Arria10 reset controllers
PATA driver for Palmchip BK371 (acked by Tejun)
Power domain drivers for i.MX (GPC, GPCv2)
- Moved out of mach-imx for GPC
- Bunch of tweaks, fixes, etc
PMC support for Tegra186
SoC detection support for Renesas RZ/G1H and RZ/G1N
Move Tegra flow controller driver from mach directory to drivers/soc
- (Power management / CPU power driver)
Misc smaller tweaks for other platforms"
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (60 commits)
soc: pm-domain: Fix the mangled urls
soc: renesas: rcar-sysc: Add support for R-Car H3 ES2.0
soc: renesas: rcar-sysc: Add support for fixing up power area tables
soc: renesas: Register SoC device early
soc: imx: gpc: add workaround for i.MX6QP to the GPC PD driver
dt-bindings: imx-gpc: add i.MX6 QuadPlus compatible
soc: imx: gpc: add defines for domain index
soc: imx: Add GPCv2 power gating driver
dt-bindings: Add GPCv2 power gating driver
ARM/clk: move the ICST library to drivers/clk
ARM: plat-versatile: remove stale clock header
ARM: keystone: Drop PM domain support for k2g
soc: ti: Add ti_sci_pm_domains driver
dt-bindings: Add TI SCI PM Domains
PM / Domains: Do not check if simple providers have phandle cells
PM / Domains: Add generic data pointer to genpd data struct
soc/tegra: Add initial flowctrl support for Tegra132/210
soc/tegra: flowctrl: Add basic platform driver
soc/tegra: Move Tegra flowctrl driver
ARM: tegra: Remove unnecessary inclusion of flowctrl header
...
Pull misc vfs updates from Al Viro:
"Assorted bits and pieces from various people. No common topic in this
pile, sorry"
* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fs/affs: add rename exchange
fs/affs: add rename2 to prepare multiple methods
Make stat/lstat/fstatat pass AT_NO_AUTOMOUNT to vfs_statx()
fs: don't set *REFERENCED on single use objects
fs: compat: Remove warning from COMPATIBLE_IOCTL
remove pointless extern of atime_need_update_rcu()
fs: completely ignore unknown open flags
fs: add a VALID_OPEN_FLAGS
fs: remove _submit_bh()
fs: constify tree_descr arrays passed to simple_fill_super()
fs: drop duplicate header percpu-rwsem.h
fs/affs: bugfix: Write files greater than page size on OFS
fs/affs: bugfix: enable writes on OFS disks
fs/affs: remove node generation check
fs/affs: import amigaffs.h
fs/affs: bugfix: make symbolic links work again
A known weakness in ptr_ring design is that it does not handle well the
situation when ring is almost full: as entries are consumed they are
immediately used again by the producer, so consumer and producer are
writing to a shared cache line.
To fix this, add batching to consume calls: as entries are
consumed do not write NULL into the ring until we get
a multiple (in current implementation 2x) of cache lines
away from the producer. At that point, write them all out.
We do the write out in the reverse order to keep
producer from sharing cache with consumer for as long
as possible.
Writeout also triggers when ring wraps around - there's
no special reason to do this but it helps keep the code
a bit simpler.
What should we do if getting away from producer by 2 cache lines
would mean we are keeping the ring moe than half empty?
Maybe we should reduce the batching in this case,
current patch simply reduces the batching.
Notes:
- it is no longer true that a call to consume guarantees
that the following call to produce will succeed.
No users seem to assume that.
- batching can also in theory reduce the signalling rate:
users that would previously send interrups to the producer
to wake it up after consuming each entry would now only
need to do this once in a batch.
Doing this would be easy by returning a flag to the caller.
No users seem to do signalling on consume yet so this was not
implemented yet.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Add comments for the virtio_driver members that were not documented.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Linus Torvalds