The MD sync thread updates recovery flags providing state of any
running, idle, frozen, recovering, reshaping, ... activity it performs
and updates respective flags asynchronously versus dm processing
raid_status(). To close that race window, take a single copy of the
flags and pass it into its callees.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
During a reshape request: if userspace reloads a "raid" table multiple
times, resulting in multiple superblock reads, the raid set needs to
stay frozen until all config changes (chunk size, layout data_offset,
delta_disks) have been stored in the superblocks and respective flags
cleared.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Check all component data device sizes versus calculated size.
Reject if device(s) are too small. Otherwise, MD will fail the
operation by accessing beyond the end of the data device.
An example use-case is that growing bitmap won't fit any more and the MD
runtime will report an error when DM raid should catch this earlier.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
The raid set size is being revalidated unconditionally before a
reshaping conversion is started. MD requires the size to only be
reduced in case of a stripe removing (i.e. shrinking) reshape but not
when growing because the raid array has to stay small until after the
growing reshape finishes.
Fix by avoiding the size revalidation in preresume unless a shrinking
reshape is requested.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Pay attention to existing reshape space to define if a raid set needs
resizing. Otherwise we can hit "Can't resize a reshaping raid set"
when a reshape is being requested.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
The md raid personalities call md_finish_reshape() at the end of a
reshape conversion which adjusts rdev->sectors.
Correct/check rdev->sectors before initiating a reshape and raise the
recovery pointer accordingly.
Otherwise, the DM raid coordinated reshape will fail.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
md_stop_writes() is called in raid_presuspend() causing deadlocks on
bios submitted afterwards -- which happens on loaded raid sets with
conversion requests.
Fix by moving md_stop_writes() to raid_postsuspend(). NOTE: when the
recovery's frozen (MD_RECOVERY_FROZEN), writes haven't been started (or
are already stopped) so don't stop them again.
Also remove superfluous readonly setting.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
When system is under memory pressure it is observed that dm bufio
shrinker often reclaims only one buffer per scan. This change fixes
the following two issues in dm bufio shrinker that cause this behavior:
1. ((nr_to_scan - freed) <= retain_target) condition is used to
terminate slab scan process. This assumes that nr_to_scan is equal
to the LRU size, which might not be correct because do_shrink_slab()
in vmscan.c calculates nr_to_scan using multiple inputs.
As a result when nr_to_scan is less than retain_target (64) the scan
will terminate after the first iteration, effectively reclaiming one
buffer per scan and making scans very inefficient. This hurts vmscan
performance especially because mutex is acquired/released every time
dm_bufio_shrink_scan() is called.
New implementation uses ((LRU size - freed) <= retain_target)
condition for scan termination. LRU size can be safely determined
inside __scan() because this function is called after dm_bufio_lock().
2. do_shrink_slab() uses value returned by dm_bufio_shrink_count() to
determine number of freeable objects in the slab. However dm_bufio
always retains retain_target buffers in its LRU and will terminate
a scan when this mark is reached. Therefore returning the entire LRU size
from dm_bufio_shrink_count() is misleading because that does not
represent the number of freeable objects that slab will reclaim during
a scan. Returning (LRU size - retain_target) better represents the
number of freeable objects in the slab. This way do_shrink_slab()
returns 0 when (LRU size < retain_target) and vmscan will not try to
scan this shrinker avoiding scans that will not reclaim any memory.
Test: tested using Android device running
<AOSP>/system/extras/alloc-stress that generates memory pressure
and causes intensive shrinker scans
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Commit ca5beb76 ("dm mpath: micro-optimize the hot path relative to
MPATHF_QUEUE_IF_NO_PATH") caused bio-based DM-multipath to fail mptest's
"test_02_sdev_delete".
Restoring the logic that existed prior to commit ca5beb76 fixes this
bio-based DM-multipath regression. Also verified all mptest tests pass
with request-based DM-multipath.
This commit effectively reverts commit ca5beb76 -- but it does so
without reintroducing the need to take the m->lock spinlock in
must_push_back_{rq,bio}.
Fixes: ca5beb76 ("dm mpath: micro-optimize the hot path relative to MPATHF_QUEUE_IF_NO_PATH")
Cc: stable@vger.kernel.org # 4.12+
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
A NULL pointer is seen if two concurrent "vgchange -ay -K <vg name>"
processes race to load the dm-thin-pool module:
PID: 25992 TASK: ffff883cd7d23500 CPU: 4 COMMAND: "vgchange"
#0 [ffff883cd743d600] machine_kexec at ffffffff81038fa9
0000001 [ffff883cd743d660] crash_kexec at ffffffff810c5992
0000002 [ffff883cd743d730] oops_end at ffffffff81515c90
0000003 [ffff883cd743d760] no_context at ffffffff81049f1b
0000004 [ffff883cd743d7b0] __bad_area_nosemaphore at ffffffff8104a1a5
0000005 [ffff883cd743d800] bad_area at ffffffff8104a2ce
0000006 [ffff883cd743d830] __do_page_fault at ffffffff8104aa6f
0000007 [ffff883cd743d950] do_page_fault at ffffffff81517bae
0000008 [ffff883cd743d980] page_fault at ffffffff81514f95
[exception RIP: kmem_cache_alloc+108]
RIP: ffffffff8116ef3c RSP: ffff883cd743da38 RFLAGS: 00010046
RAX: 0000000000000004 RBX: ffffffff81121b90 RCX: ffff881bf1e78cc0
RDX: 0000000000000000 RSI: 00000000000000d0 RDI: 0000000000000000
RBP: ffff883cd743da68 R8: ffff881bf1a4eb00 R9: 0000000080042000
R10: 0000000000002000 R11: 0000000000000000 R12: 00000000000000d0
R13: 0000000000000000 R14: 00000000000000d0 R15: 0000000000000246
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
0000009 [ffff883cd743da70] mempool_alloc_slab at ffffffff81121ba5
0000010 [ffff883cd743da80] mempool_create_node at ffffffff81122083
0000011 [ffff883cd743dad0] mempool_create at ffffffff811220f4
0000012 [ffff883cd743dae0] pool_ctr at ffffffffa08de049 [dm_thin_pool]
0000013 [ffff883cd743dbd0] dm_table_add_target at ffffffffa0005f2f [dm_mod]
0000014 [ffff883cd743dc30] table_load at ffffffffa0008ba9 [dm_mod]
0000015 [ffff883cd743dc90] ctl_ioctl at ffffffffa0009dc4 [dm_mod]
The race results in a NULL pointer because:
Process A (vgchange -ay -K):
a. send DM_LIST_VERSIONS_CMD ioctl;
b. pool_target not registered;
c. modprobe dm_thin_pool and wait until end.
Process B (vgchange -ay -K):
a. send DM_LIST_VERSIONS_CMD ioctl;
b. pool_target registered;
c. table_load->dm_table_add_target->pool_ctr;
d. _new_mapping_cache is NULL and panic.
Note:
1. process A and process B are two concurrent processes.
2. pool_target can be detected by process B but
_new_mapping_cache initialization has not ended.
To fix dm-thin-pool, and other targets (cache, multipath, and snapshot)
with the same problem, simply dm_register_target() after all resources
created during module init (as labelled with __init) are finished.
Cc: stable@vger.kernel.org
Signed-off-by: monty <monty_pavel@sina.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Multiple refcounts are needed if the device was already added. The
micro-optimization of setting the refcount to 1 on first added (rather
than fall thru to a common refcount_inc) lost sight of the fact that the
refcount_inc is also needed for the case when the device already exists
and the mode need not be upgraded.
Fixes: 2a0b4682e0 ("dm: convert dm_dev_internal.count from atomic_t to refcount_t")
Reported-by: Zdenek Kabelac <zkabelac@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Pull ARM fix from Russell King:
"Just one fix this time around, for the late commit in the merge window
that triggered a problem with qemu. Qemu is apparently also going to
receive a fix for the discovered issue"
* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: avoid faulting on qemu
Pull i2c fixes from Wolfram Sang:
"Here are two bugfixes for I2C, fixing a memleak in the core and irq
allocation for i801.
Also three bugfixes for the at24 eeprom driver which Bartosz collected
while taking over maintainership for this driver"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
eeprom: at24: check at24_read/write arguments
eeprom: at24: fix reading from 24MAC402/24MAC602
eeprom: at24: correctly set the size for at24mac402
i2c: i2c-boardinfo: fix memory leaks on devinfo
i2c: i801: Fix Failed to allocate irq -2147483648 error
Drop reference to obsolete maintainer tree
Fix overflow bug in pmbus driver
Fix SMBUS timeout problem in jc42 driver
For the SMBUS timeout handling, we had a brief discussion if this should
be considered a bug fix or a feature. Peter says "it fixes real problems
where the application misbehave due to faulty content when reading from
an eeprom", and he needs the patch in his company's v4.14 images. This is
good enough for me and warrants backport to stable kernels.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=5rYP
-----END PGP SIGNATURE-----
Merge tag 'hwmon-for-linus-v4.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
"Fixes:
- Drop reference to obsolete maintainer tree
- Fix overflow bug in pmbus driver
- Fix SMBUS timeout problem in jc42 driver
For the SMBUS timeout handling, we had a brief discussion if this
should be considered a bug fix or a feature. Peter says "it fixes real
problems where the application misbehave due to faulty content when
reading from an eeprom", and he needs the patch in his company's v4.14
images. This is good enough for me and warrants backport to stable
kernels"
* tag 'hwmon-for-linus-v4.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (jc42) optionally try to disable the SMBUS timeout
hwmon: (pmbus) Use 64bit math for DIRECT format values
hwmon: Drop reference to Jean's tree
-----BEGIN PGP SIGNATURE-----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=ldzq
-----END PGP SIGNATURE-----
Merge tag 'at24-4.15-fixes-for-wolfram' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into i2c/for-current
Please consider pulling the following fixes for v4.15. While it doesn't
fix any regression introduced in the v4.15 merge window, we have a
feature in at24 since linux v4.8 - reading the mac address block from
at24mac series - which turned out to be not working.
This pull request contains changes that fix it together with a patch
that hardens the read and write argument sanitization with
out-of-bounds checks that were missing.
Bugfixes:
- NFSv4: Ensure gcc 4.4.4 can compile initialiser for "invalid_stateid"
- SUNRPC: Allow connect to return EHOSTUNREACH
- SUNRPC: Handle ENETDOWN errors
-----BEGIN PGP SIGNATURE-----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=eQyi
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-4.15-2' of git://git.linux-nfs.org/projects/anna/linux-nfs
Pull NFS client fixes from Anna Schumaker:
"These patches fix a problem with compiling using an old version of
gcc, and also fix up error handling in the SUNRPC layer.
- NFSv4: Ensure gcc 4.4.4 can compile initialiser for
"invalid_stateid"
- SUNRPC: Allow connect to return EHOSTUNREACH
- SUNRPC: Handle ENETDOWN errors"
* tag 'nfs-for-4.15-2' of git://git.linux-nfs.org/projects/anna/linux-nfs:
SUNRPC: Handle ENETDOWN errors
SUNRPC: Allow connect to return EHOSTUNREACH
NFSv4: Ensure gcc 4.4.4 can compile initialiser for "invalid_stateid"
- Fix memory leaks that appeared after removing ifork inline data buffer
- Recover deferred rmap update log items in correct order
- Fix memory leaks when buffer construction fails
- Fix memory leaks when bmbt is corrupt
- Fix some uninitialized variables and math problems in the quota scrubber
- Add some omitted attribution tags on the log replay commit
- Fix some UBSAN complaints about integer overflows with large sparse files
- Implement an effective inode mode check in online fsck
- Fix log's inability to retry quota item writeout due to transient errors
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=oTB7
-----END PGP SIGNATURE-----
Merge tag 'xfs-4.15-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fixes from Darrick Wong:
"Here are some bug fixes for 4.15-rc2.
- fix memory leaks that appeared after removing ifork inline data
buffer
- recover deferred rmap update log items in correct order
- fix memory leaks when buffer construction fails
- fix memory leaks when bmbt is corrupt
- fix some uninitialized variables and math problems in the quota
scrubber
- add some omitted attribution tags on the log replay commit
- fix some UBSAN complaints about integer overflows with large sparse
files
- implement an effective inode mode check in online fsck
- fix log's inability to retry quota item writeout due to transient
errors"
* tag 'xfs-4.15-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: Properly retry failed dquot items in case of error during buffer writeback
xfs: scrub inode mode properly
xfs: remove unused parameter from xfs_writepage_map
xfs: ubsan fixes
xfs: calculate correct offset in xfs_scrub_quota_item
xfs: fix uninitialized variable in xfs_scrub_quota
xfs: fix leaks on corruption errors in xfs_bmap.c
xfs: fortify xfs_alloc_buftarg error handling
xfs: log recovery should replay deferred ops in order
xfs: always free inline data before resetting inode fork during ifree
This tag contains a handful of small cleanups that are a result of
feedback that didn't make it into our original patch set, either because
the feedback hadn't been given yet, I missed the original emails, or
we weren't ready to submit the changes yet.
I've been maintaining the various cleanup patch sets I have as their own
branches, which I then merged together and signed. Each merge commit
has a short summary of the changes, and each branch is based on your
latest tag (4.15-rc1, in this case). If this isn't the right way to do
this then feel free to suggest something else, but it seems sane to me.
Here's a short summary of the changes, roughly in order of how
interesting they are.
* libgcc.h has been moved from include/lib, where it's the only member,
to include/linux. This is meant to avoid tab completion conflicts.
* VDSO entries for clock_get/gettimeofday/getcpu have been added. These
are simple syscalls now, but we want to let glibc use them from the
start so we can make them faster later.
* A VDSO entry for instruction cache flushing has been added so
userspace can flush the instruction cache.
* The VDSO symbol versions for __vdso_cmpxchg{32,64} have been removed,
as those VDSO entries don't actually exist.
* __io_writes has been corrected to respect the given type.
* A new READ_ONCE in arch_spin_is_locked().
* __test_and_op_bit_ord() is now actually ordered.
* Various small fixes throughout the tree to enable allmodconfig to
build cleanly.
* Removal of some dead code in our atomic support headers.
* Improvements to various comments in our atomic support headers.
-----BEGIN PGP SIGNATURE-----
iQJHBAABCAAxFiEEAM520YNJYN/OiG3470yhUCzLq0EFAlohyvMTHHBhbG1lckBk
YWJiZWx0LmNvbQAKCRDvTKFQLMurQWkhD/wO/F8vrwsNMOWR8zxvHdB30KD+FHmr
X1+X9OqnH8AMd4Woj6pS0ap7g0GCKuLiI/bOTrQVVdTJpmKFaJ9rrwRCJzHq43yt
feRjKyPAFYlvf6YaIEJ3YHU0t3LO1eK27YyFMg6F8y+bZim6oK2GdyfYF0Xiik3B
L3NkDPSH4oplTJjUI+tzDZdMsuZKhxpXPnbNQA7YZLepz04jOPGWqFrA1C3gAaVQ
dj1OkOGTSyQFwia7LrIm2g0J5/mqpjAF0KjdiTsvH6G9x3V0HZYU5Br3kHgauWKc
YrNEbbDl8EakT5QocPf5F4Z8qpO9Hvxjwe2/z27usPtV9FQOPuDDPOygSPykwNNJ
bDfv9nIE3W7lN26BaRcV2ivY3r9ZpCEcq+qXIiTm3P/uTVqjMq54NkvHnj4ON1ih
DJZEgkM9L+rm7c9XDn627FBkmkeEndPJcQ3P/nopb5zGTYTb2HGrUt2nM+KR2vuE
FdYtA9+ll3OzyFO3OVVjiAlxr8Qnwf2wIWXJXxWpcmmchGJ5NeTSZtiD14pAP5eC
EDpoWwefvhqRMGdOlgq/fkx4Mrhz27euWXine3ZccprABAf7Hxkb/N5ojIJKT7qW
mN3HL3PC9P0t/HxQEu0q0NLLsP+X/1yZ5HmDl44Y7N8aeCrIUXaB61gsTt6Oi6Ha
PMJi5PI6VDDQbA==
=CCe+
-----END PGP SIGNATURE-----
Merge tag 'riscv-for-linus-4.15-rc2_cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/linux
Pull RISC-V cleanups and ABI fixes from Palmer Dabbelt:
"This contains a handful of small cleanups that are a result of
feedback that didn't make it into our original patch set, either
because the feedback hadn't been given yet, I missed the original
emails, or we weren't ready to submit the changes yet.
I've been maintaining the various cleanup patch sets I have as their
own branches, which I then merged together and signed. Each merge
commit has a short summary of the changes, and each branch is based on
your latest tag (4.15-rc1, in this case). If this isn't the right way
to do this then feel free to suggest something else, but it seems sane
to me.
Here's a short summary of the changes, roughly in order of how
interesting they are.
- libgcc.h has been moved from include/lib, where it's the only
member, to include/linux. This is meant to avoid tab completion
conflicts.
- VDSO entries for clock_get/gettimeofday/getcpu have been added.
These are simple syscalls now, but we want to let glibc use them
from the start so we can make them faster later.
- A VDSO entry for instruction cache flushing has been added so
userspace can flush the instruction cache.
- The VDSO symbol versions for __vdso_cmpxchg{32,64} have been
removed, as those VDSO entries don't actually exist.
- __io_writes has been corrected to respect the given type.
- A new READ_ONCE in arch_spin_is_locked().
- __test_and_op_bit_ord() is now actually ordered.
- Various small fixes throughout the tree to enable allmodconfig to
build cleanly.
- Removal of some dead code in our atomic support headers.
- Improvements to various comments in our atomic support headers"
* tag 'riscv-for-linus-4.15-rc2_cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/linux: (23 commits)
RISC-V: __io_writes should respect the length argument
move libgcc.h to include/linux
RISC-V: Clean up an unused include
RISC-V: Allow userspace to flush the instruction cache
RISC-V: Flush I$ when making a dirty page executable
RISC-V: Add missing include
RISC-V: Use define for get_cycles like other architectures
RISC-V: Provide stub of setup_profiling_timer()
RISC-V: Export some expected symbols for modules
RISC-V: move empty_zero_page definition to C and export it
RISC-V: io.h: type fixes for warnings
RISC-V: use RISCV_{INT,SHORT} instead of {INT,SHORT} for asm macros
RISC-V: use generic serial.h
RISC-V: remove spin_unlock_wait()
RISC-V: `sfence.vma` orderes the instruction cache
RISC-V: Add READ_ONCE in arch_spin_is_locked()
RISC-V: __test_and_op_bit_ord should be strongly ordered
RISC-V: Remove smb_mb__{before,after}_spinlock()
RISC-V: Remove __smp_bp__{before,after}_atomic
RISC-V: Comment on why {,cmp}xchg is ordered how it is
...
- Fix FP register corruption when SVE is not available or in use
- Fix out-of-tree module build failure when CONFIG_ARM64_MODULE_PLTS=y
- Missing 'const' generating errors with LTO builds
- Remove unsupported events from Cortex-A73 PMU description
- Removal of stale and incorrect comments
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABCgAGBQJaIXOkAAoJELescNyEwWM0swYH/3iSLxKnGDht1M9xqa5V288z
eNC/Vw/Y/Sqi305reRK6gWbJ0hwtJLYSEK3tDbeL6C9v9mg8CIZNzbPI3vrEjAq+
n8yKmJVYaXlu9jmmo7vqF7LZ7LRgKZPO0cEKWZBR8LAYjD0zJPikwDR/JvTkGH75
1VnFfwuMykB989NMcVGQ1eD2G5RH13e2j9D2ErT0fbdcZ/MWpcviVVqMr4ggsQoR
imVozMPXXLQ/0LeUfr8IRIst3x0CgFwmMX7CDWoVJJJXB7Zq0nvNptEtlS5tUZ/x
1vbXJstFasG3EL6QKiKxfUvtbaa4Vm7xEBBIVABQij+iUw8Og1OBojVi0wBCE3s=
=9hCV
-----END PGP SIGNATURE-----
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"The critical one here is a fix for fpsimd register corruption across
signals which was introduced by the SVE support code (the register
files overlap), but the others are worth having as well.
Summary:
- Fix FP register corruption when SVE is not available or in use
- Fix out-of-tree module build failure when CONFIG_ARM64_MODULE_PLTS=y
- Missing 'const' generating errors with LTO builds
- Remove unsupported events from Cortex-A73 PMU description
- Removal of stale and incorrect comments"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: context: Fix comments and remove pointless smp_wmb()
arm64: cpu_ops: Add missing 'const' qualifiers
arm64: perf: remove unsupported events for Cortex-A73
arm64: fpsimd: Fix failure to restore FPSIMD state after signals
arm64: pgd: Mark pgd_cache as __ro_after_init
arm64: ftrace: emit ftrace-mod.o contents through code
arm64: module-plts: factor out PLT generation code for ftrace
arm64: mm: cleanup stale AIVIVT references
Olaf said: Here's a short series of patches that produces a working
allmodconfig. Would be nice to see them go in so we can add build
coverage.
I've dropped patches 8 and 10 from the original set:
* [PATCH 08/10] (RISC-V: Set __ARCH_WANT_RENAMEAT to pick up generic
version) has a better fix that I've sent out for review, we don't want
renameat.
* [PATCH 10/10] (input: joystick: riscv has get_cycles) has already been
taken into Dmitry Torokhov's tree.
This merge contains the user-visible, ABI-breaking changes that we want
to make sure we have in Linux before our first release. Highlights
include:
* VDSO entries for clock_get/gettimeofday/getcpu have been added. These
are simple syscalls now, but we want to let glibc use them from the
start so we can make them faster later.
* A VDSO entry for instruction cache flushing has been added so
userspace can flush the instruction cache.
* The VDSO symbol versions for __vdso_cmpxchg{32,64} have been removed,
as those VDSO entries don't actually exist.
Conflicts:
arch/riscv/include/asm/tlbflush.h
This patch set is the result of some feedback that filtered through
after our original patch set was reviewed, some of which was the result
of me missing some email. It contains:
* A new READ_ONCE in arch_spin_is_locked()
* __test_and_op_bit_ord() is now actually ordered
* Improvements to various comments
* Removal of some dead code
Whoops -- I must have just been being an idiot again. Thanks to Segher
for finding the bug :).
CC: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Introducing a new include/lib directory just for this file totally
messes up tab completion for include/linux, which is highly annoying.
Move it to include/linux where we have headers for all kinds of other
lib/ code as well.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Two fixes for nasty kexec/kdump crashes in certain configurations.
A couple of minor fixes for the new TIDR code.
A fix for an oops in a CXL error handling path.
Thanks to:
Andrew Donnellan, Christophe Lombard, David Gibson, Mahesh Salgaonkar, Vaibhav Jain.
-----BEGIN PGP SIGNATURE-----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=/LD/
-----END PGP SIGNATURE-----
Merge tag 'powerpc-4.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Two fixes for nasty kexec/kdump crashes in certain configurations.
A couple of minor fixes for the new TIDR code.
A fix for an oops in a CXL error handling path.
Thanks to: Andrew Donnellan, Christophe Lombard, David Gibson, Mahesh
Salgaonkar, Vaibhav Jain"
* tag 'powerpc-4.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc: Do not assign thread.tidr if already assigned
powerpc: Avoid signed to unsigned conversion in set_thread_tidr()
powerpc/kexec: Fix kexec/kdump in P9 guest kernels
powerpc/powernv: Fix kexec crashes caused by tlbie tracing
cxl: Check if vphb exists before iterating over AFU devices
-----BEGIN PGP SIGNATURE-----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=1krM
-----END PGP SIGNATURE-----
Merge tag 'afs-fixes-20171201' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
Pull AFS fixes from David Howells:
"Two fix patches for the AFS filesystem:
- Fix the refcounting on permit caching.
- AFS inode (afs_vnode) fields need resetting after allocation
because they're only initialised when slab pages are obtained from
the page allocator"
* tag 'afs-fixes-20171201' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: Properly reset afs_vnode (inode) fields
afs: Fix permit refcounting
- Ensure that debugfs files are removed properly
- Fix missing blk_put_request()
- Deal with errors from blk_get_request()
- Rewind mmc bus suspend operations at failures
- Prepend '0x' to ocr and pre_eol_info in sysfs to identify as hex
MMC host:
- sdhci-msm: Make it optional to wait for signal level changes
- sdhci: Avoid swiotlb buffer being full
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=13VJ
-----END PGP SIGNATURE-----
Merge tag 'mmc-v4.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"MMC core:
- Ensure that debugfs files are removed properly
- Fix missing blk_put_request()
- Deal with errors from blk_get_request()
- Rewind mmc bus suspend operations at failures
- Prepend '0x' to ocr and pre_eol_info in sysfs to identify as hex
MMC host:
- sdhci-msm: Make it optional to wait for signal level changes
- sdhci: Avoid swiotlb buffer being full"
* tag 'mmc-v4.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: core: prepend 0x to OCR entry in sysfs
mmc: core: prepend 0x to pre_eol_info entry in sysfs
mmc: sdhci: Avoid swiotlb buffer being full
mmc: sdhci-msm: Optionally wait for signal level changes
mmc: block: Ensure that debugfs files are removed
mmc: core: Do not leave the block driver in a suspended state
mmc: block: Check return value of blk_get_request()
mmc: block: Fix missing blk_put_request()
-----BEGIN PGP SIGNATURE-----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=RcDz
-----END PGP SIGNATURE-----
Merge tag 'drm-fixes-for-v4.15-rc2' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes and cleanups from Dave Airlie:
"The main thing are a bunch of fixes for the new amd display code, a
bunch of smatch fixes.
core:
- Atomic helper regression fix.
- Deferred fbdev fallout regression fix.
amdgpu:
- New display code (dc) dpms, suspend/resume and smatch fixes, along
with some others
- Some regression fixes for amdkfd/radeon.
- Fix a ttm regression for swiotlb disabled
bridge:
- A bunch of fixes for the tc358767 bridge
mali-dp + hdlcd:
- some fixes and internal API catchups.
imx-drm:
-regression fix in atomic code.
omapdrm:
- platform detection regression fixes"
* tag 'drm-fixes-for-v4.15-rc2' of git://people.freedesktop.org/~airlied/linux: (76 commits)
drm/imx: always call wait_for_flip_done in commit_tail
omapdrm: hdmi4_cec: signedness bug in hdmi4_cec_init()
drm: omapdrm: Fix DPI on platforms using the DSI VDDS
omapdrm: hdmi4: Correct the SoC revision matching
drm/omap: displays: panel-dpi: add backlight dependency
drm/omap: Fix error handling path in 'omap_dmm_probe()'
drm/i915: Disable THP until we have a GPU read BW W/A
drm/bridge: tc358767: fix 1-lane behavior
drm/bridge: tc358767: fix AUXDATAn registers access
drm/bridge: tc358767: fix timing calculations
drm/bridge: tc358767: fix DP0_MISC register set
drm/bridge: tc358767: filter out too high modes
drm/bridge: tc358767: do no fail on hi-res displays
drm/bridge: Fix lvds-encoder since the panel_bridge rework.
drm/bridge: synopsys/dw-hdmi: Enable cec clock
drm/bridge: adv7511/33: Fix adv7511_cec_init() failure handling
drm/radeon: remove init of CIK VMIDs 8-16 for amdkfd
drm/ttm: fix populate_and_map() functions once more
drm/fb_helper: Disable all crtc's when initial setup fails.
drm/atomic: make drm_atomic_helper_wait_for_vblanks more agressive
...
Pull block fixes from Jens Axboe:
"A selection of fixes/changes that should make it into this series.
This contains:
- NVMe, two merges, containing:
- pci-e, rdma, and fc fixes
- Device quirks
- Fix for a badblocks leak in null_blk
- bcache fix from Rui Hua for a race condition regression where
-EINTR was returned to upper layers that didn't expect it.
- Regression fix for blktrace for a bug introduced in this series.
- blktrace cleanup for cgroup id.
- bdi registration error handling.
- Small series with cleanups for blk-wbt.
- Various little fixes for typos and the like.
Nothing earth shattering, most important are the NVMe and bcache fixes"
* 'for-linus' of git://git.kernel.dk/linux-block: (34 commits)
nvme-pci: fix NULL pointer dereference in nvme_free_host_mem()
nvme-rdma: fix memory leak during queue allocation
blktrace: fix trace mutex deadlock
nvme-rdma: Use mr pool
nvme-rdma: Check remotely invalidated rkey matches our expected rkey
nvme-rdma: wait for local invalidation before completing a request
nvme-rdma: don't complete requests before a send work request has completed
nvme-rdma: don't suppress send completions
bcache: check return value of register_shrinker
bcache: recover data from backing when data is clean
bcache: Fix building error on MIPS
bcache: add a comment in journal bucket reading
nvme-fc: don't use bit masks for set/test_bit() numbers
blk-wbt: fix comments typo
blk-wbt: move wbt_clear_stat to common place in wbt_done
blk-sysfs: remove NULL pointer checking in queue_wb_lat_store
blk-wbt: remove duplicated setting in wbt_init
nvme-pci: add quirk for delay before CHK RDY for WDC SN200
block: remove useless assignment in bio_split
null_blk: fix dev->badblocks leak
...
The comments in the ASID allocator incorrectly hint at an MP-style idiom
using the asid_generation and the active_asids array. In fact, the
synchronisation is achieved using a combination of an xchg operation
and a spinlock, so update the comments and remove the pointless smp_wmb().
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Building the kernel with an LTO-enabled GCC spits out the following "const"
warning for the cpu_ops code:
mm/percpu.c:2168:20: error: pcpu_fc_names causes a section type conflict
with dt_supported_cpu_ops
const char * const pcpu_fc_names[PCPU_FC_NR] __initconst = {
^
arch/arm64/kernel/cpu_ops.c:34:37: note: ‘dt_supported_cpu_ops’ was declared here
static const struct cpu_operations *dt_supported_cpu_ops[] __initconst = {
Fix it by adding missed const qualifiers.
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
bus access read/write events are not supported in A73, based on the
Cortex-A73 TRM r0p2, section 11.9 Events (pages 11-457 to 11-460).
Fixes: 5561b6c5e9 "arm64: perf: add support for Cortex-A73"
Acked-by: Julien Thierry <julien.thierry@arm.com>
Signed-off-by: Xu YiPing <xuyiping@hisilicon.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
The fpsimd_update_current_state() function is responsible for
loading the FPSIMD state from the user signal frame into the
current task during sigreturn. When implementing support for SVE,
conditional code was added to this function in order to handle the
case where SVE state need to be loaded for the task and merged with
the FPSIMD data from the signal frame; however, the FPSIMD-only
case was unintentionally dropped.
As a result of this, sigreturn does not currently restore the
FPSIMD state of the task, except in the case where the system
supports SVE and the signal frame contains SVE state in addition to
FPSIMD state.
This patch fixes this bug by making the copy-in of the FPSIMD data
from the signal frame to thread_struct unconditional.
This remains a performance regression from v4.14, since the FPSIMD
state is now copied into thread_struct and then loaded back,
instead of _only_ being loaded into the CPU FPSIMD registers.
However, it is essential to call task_fpsimd_load() here anyway in
order to ensure that the SVE enable bit in CPACR_EL1 is set
correctly before returning to userspace. This could use some
refactoring, but since sigreturn is not a fast path I have kept
this patch as a pure fix and left the refactoring for later.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Fixes: 8cd969d28f ("arm64/sve: Signal handling support")
Reported-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
pgd_cache is setup once while init stage and never changed after
that, so it is good candidate for __ro_after_init
Signed-off-by: Jinbum Park <jinb.park7@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
When building the arm64 kernel with both CONFIG_ARM64_MODULE_PLTS and
CONFIG_DYNAMIC_FTRACE enabled, the ftrace-mod.o object file is built
with the kernel and contains a trampoline that is linked into each
module, so that modules can be loaded far away from the kernel and
still reach the ftrace entry point in the core kernel with an ordinary
relative branch, as is emitted by the compiler instrumentation code
dynamic ftrace relies on.
In order to be able to build out of tree modules, this object file
needs to be included into the linux-headers or linux-devel packages,
which is undesirable, as it makes arm64 a special case (although a
precedent does exist for 32-bit PPC).
Given that the trampoline essentially consists of a PLT entry, let's
not bother with a source or object file for it, and simply patch it
in whenever the trampoline is being populated, using the existing
PLT support routines.
Cc: <stable@vger.kernel.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
To allow the ftrace trampoline code to reuse the PLT entry routines,
factor it out and move it into asm/module.h.
Cc: <stable@vger.kernel.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
When an AFS inode is allocated by afs_alloc_inode(), the allocated
afs_vnode struct isn't necessarily reset from the last time it was used as
an inode because the slab constructor is only invoked once when the memory
is obtained from the page allocator.
This means that information can leak from one inode to the next because
we're not calling kmem_cache_zalloc(). Some of the information isn't
reset, in particular the permit cache pointer.
Bring the clearances up to date.
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marc Dionne <marc.dionne@auristor.com>
Fix four refcount bugs in afs_cache_permit():
(1) When checking the result of the kzalloc(), we can't just return, but
must put 'permits'.
(2) We shouldn't put permits immediately after hashing a new permit as we
need to keep the pointer stable so that we can check to see if
vnode->permit_cache has changed before we decide whether to assign to
it.
(3) 'permits' is being put twice.
(4) We need to put either the replacement or the thing replaced after the
assignment to vnode->permit_cache.
Without this, lots of the following are seen:
Kernel BUG at ffffffffa039857b [verbose debug info unavailable]
------------[ cut here ]------------
Kernel BUG at ffffffffa039858a [verbose debug info unavailable]
------------[ cut here ]------------
The addresses are in the .text..refcount section of the kafs.ko module.
Following the relocation records for the __ex_table section shows one to be
due to the decrement in afs_put_permits() and the other to be key_get() in
afs_cache_permit().
Occasionally, the following is seen:
refcount_t overflow at afs_cache_permit+0x57d/0x5c0 [kafs] in cc1[562], uid/euid: 0/0
WARNING: CPU: 0 PID: 562 at kernel/panic.c:657 refcount_error_report+0x9c/0xac
...
Reported-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marc Dionne <marc.dionne@auristor.com>
- Fix an ACPI EC driver regression (from the 4.9 cycle) causing
the driver's power management operations to be omitted during
system suspend/resume on platforms where the EC instance from the
ECDT table is used instead of the one from the DSDT (Lv Zheng).
- Prevent modalias from being exposed to user space for ACPI device
objects with _STA returning 0 (not present and not functional) to
prevent driver modules from being loaded automatically for
hardware that is not actually present on some platforms (Hans
de Goede).
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=dmeF
-----END PGP SIGNATURE-----
Merge tag 'acpi-4.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
"These fix a regression related to the ACPI EC handling during system
suspend/resume on some platforms and prevent modalias from being
exposed to user space for ACPI device object with "not functional and
not present" status.
Specifics:
- Fix an ACPI EC driver regression (from the 4.9 cycle) causing the
driver's power management operations to be omitted during system
suspend/resume on platforms where the EC instance from the ECDT
table is used instead of the one from the DSDT (Lv Zheng).
- Prevent modalias from being exposed to user space for ACPI device
objects with _STA returning 0 (not present and not functional) to
prevent driver modules from being loaded automatically for hardware
that is not actually present on some platforms (Hans de Goede)"
* tag 'acpi-4.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / EC: Fix regression related to PM ops support in ECDT device
ACPI / bus: Leave modalias empty for devices which are not present
These add missing module information to the Mediatek cpufreq driver
module (Jesse Chan), fix config dependencies for the Loongson cpufreq
driver (James Hogan) and fix two issues related to CPU offline in
the cpupower utility (Abhishek Goel).
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=ZzZK
-----END PGP SIGNATURE-----
Merge tag 'pm-4.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
- add missing module information to the Mediatek cpufreq driver module
(Jesse Chan)
- fix config dependencies for the Loongson cpufreq driver (James Hogan)
- fix two issues related to CPU offline in the cpupower utility
(Abhishek Goel).
* tag 'pm-4.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: mediatek: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE
cpufreq: Add Loongson machine dependencies
cpupower : Fix cpupower working when cpu0 is offline
cpupowerutils: bench - Fix cpu online check
Fixes for 4.15. Highlights:
- DC fixes for S3, gamma, audio, pageflipping, etc.
- fix a regression in radeon from kfd removal
- fix a ttm regression with swiotlb disabled
- misc other fixes
* 'drm-fixes-4.15' of git://people.freedesktop.org/~agd5f/linux: (36 commits)
drm/radeon: remove init of CIK VMIDs 8-16 for amdkfd
drm/ttm: fix populate_and_map() functions once more
drm/amd/display: USB-C / thunderbolt dock specific workaround
drm/amd/display: Switch to drm_atomic_helper_wait_for_flip_done
drm/amd/display: fix gamma setting
drm/amd/display: Do not put drm_atomic_state on resume
drm/amd/display: Fix couple more inconsistent NULL checks in dc_resource
drm/amd/display: Fix potential NULL and mem leak in create_links
drm/amd/display: Fix hubp check in set_cursor_position
drm/amd/display: Fix use before NULL check in validate_timing
drm/amd/display: Bunch of smatch error and warning fixes in DC
drm/amd/display: Fix amdgpu_dm bugs found by smatch
drm/amd/display: try to find matching audio inst for enc inst first
drm/amd/display: fix seq issue: turn on clock before programming afmt.
drm/amd/display: fix memory leaks on error exit return
drm/amd/display: check plane state before validating fbc
drm/amd/display: Do DC mode-change check when adding CRTCs
drm/amd/display: Revert noisy assert messages
drm/amd/display: fix split viewport rounding error
drm/amd/display: Check aux channel before MST resume
...
mali-dp interface cleanups.
* 'for-upstream/mali-dp' of git://linux-arm.org/linux-ld:
drm: mali-dp: Disable planes when their CRTC gets disabled.
drm: mali-dp: Separate static internal data into a read-only structure.
drm/arm: Replace instances of drm_dev_unref with drm_dev_put.
drm: mali-dp: switch to drm_*_get(), drm_*_put() helpers
This is amdkfd pull request for -rc2. It contains three small fixes to the
CIK SDMA code, compilation error fix in kfd_ioctl.h and fix to accessing
a pointer after it was released.
* tag 'drm-amdkfd-fixes-2017-11-26' of git://people.freedesktop.org/~gabbayo/linux:
uapi: fix linux/kfd_ioctl.h userspace compilation errors
drm/amdkfd: fix amdkfd use-after-free GP fault
drm/amdkfd: Fix SDMA oversubsription handling
drm/amdkfd: Fix SDMA ring buffer size calculation
drm/amdgpu: Fix SDMA load/unload sequence on HWS disabled mode
3 hdlcd fixes/cleanups
* 'for-upstream/hdlcd' of git://linux-arm.org/linux-ld:
drm/arm: Replace instances of drm_dev_unref with drm_dev_put.
drm: Fix checkpatch issue: "WARNING: braces {} are not necessary for single statement blocks."
drm: hdlcd: Update PM code to save/restore console.
Since commit 080de2e5be ("drm/atomic: Check for busy planes/connectors before
setting the commit"), drm_atomic_helper_setup_commit expects that blocking
commits have completed flipping before the commit_tail returns. Add the missing
wait_for_flip_done to commit_tail to ensure this.
-----BEGIN PGP SIGNATURE-----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=DAk8
-----END PGP SIGNATURE-----
Merge tag 'imx-drm-fixes-2017-11-30' of git://git.pengutronix.de/git/pza/linux into drm-fixes
drm/imx: fix commit_tail for new drm_atomic_helper_setup_commit
Since commit 080de2e5be ("drm/atomic: Check for busy planes/connectors before
setting the commit"), drm_atomic_helper_setup_commit expects that blocking
commits have completed flipping before the commit_tail returns. Add the missing
wait_for_flip_done to commit_tail to ensure this.
* tag 'imx-drm-fixes-2017-11-30' of git://git.pengutronix.de/git/pza/linux:
drm/imx: always call wait_for_flip_done in commit_tail
Heinz Mauelshagen