Consider the following example:
* The logical block size is 4 KB.
* The physical block size is 8 KB.
* max_sectors equals (16 KB >> 9) sectors.
* A non-aligned 4 KB and an aligned 64 KB bio are merged into a single
non-aligned 68 KB bio.
The current behavior is to split such a bio into (16 KB + 16 KB + 16 KB
+ 16 KB + 4 KB). The start of none of these five bio's is aligned to a
physical block boundary.
This patch ensures that such a bio is split into four aligned and
one non-aligned bio instead of being split into five non-aligned bios.
This improves performance because most block devices can handle aligned
requests faster than non-aligned requests.
Since the physical block size is larger than or equal to the logical
block size, this patch preserves the guarantee that the returned
value is a multiple of the logical block size.
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Move the max_sectors check into bvec_split_segs() such that a single
call to that function can do all the necessary checks. This patch
optimizes the fast path further, namely if a bvec fits in a page.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Simplify this function by by removing two if-tests. Other than requiring
that the @sectors pointer is not NULL, this patch does not change the
behavior of bvec_split_segs().
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Since what the bio splitting functions do is nontrivial, document these
functions.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Make it clear to the compiler and also to humans that the functions
that query request queue properties do not modify any member of the
request_queue data structure.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
blk_mq_tagset_wait_completed_request() has been applied for waiting
for completed request's fn, so not necessary to use
blk_mq_complete_request_sync() any more.
Cc: Max Gurtovoy <maxg@mellanox.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
When aborting in-flight request for recovering controller, we have
to make sure that queue's complete function is called on completed
request before moving on. Otherwise, for example, the warning of
WARN_ON_ONCE(qp->mrs_used > 0) in ib_destroy_qp_user() may be
triggered on nvme-rdma.
Fix this issue by using blk_mq_tagset_wait_completed_request.
Cc: Max Gurtovoy <maxg@mellanox.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Before aborting in-flight requests, all IO queues and their interrupts
have been shutdown. However, request's completion function may not be
done yet because it can be scheduled to run via IPI.
So don't abort one request if it is marked as completed, otherwise
we may abort one normal completed request.
Cc: Max Gurtovoy <maxg@mellanox.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
blk-mq may schedule to call queue's complete function on remote CPU via
IPI, but doesn't provide any way to synchronize the request's complete
fn. The current queue freeze interface can't provide the synchonization
because aborted requests stay at blk-mq queues during EH.
In some driver's EH(such as NVMe), hardware queue's resource may be freed &
re-allocated. If the completed request's complete fn is run finally after the
hardware queue's resource is released, kernel crash will be triggered.
Prepare for fixing this kind of issue by introducing
blk_mq_tagset_wait_completed_request().
Cc: Max Gurtovoy <maxg@mellanox.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
NVMe needs this function to decide if one request to be aborted has
been completed in normal IO path already.
So introduce it.
Cc: Max Gurtovoy <maxg@mellanox.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
-----BEGIN PGP SIGNATURE-----
iJYEABYIAD4WIQRE6pSOnaBC00OEHEIaerohdGur0gUCXUdXeCAcamFya2tvLnNh
a2tpbmVuQGxpbnV4LmludGVsLmNvbQAKCRAaerohdGur0mJNAP46OVIe/V8wAZJe
DiybBowaW6wd2ovsUXmJhHsywwufVQD9GC7K/xRDzRw+PU5EIH3mFMA+RrTApl2M
CxKW6EcLkQk=
=OGJP
-----END PGP SIGNATURE-----
Merge tag 'tpmdd-next-20190805' of git://git.infradead.org/users/jjs/linux-tpmdd
Pull tpm fixes from Jarkko Sakkinen:
"Two bug fixes that did not make into my first pull request"
* tag 'tpmdd-next-20190805' of git://git.infradead.org/users/jjs/linux-tpmdd:
tpm: tpm_ibm_vtpm: Fix unallocated banks
tpm: Fix null pointer dereference on chip register error path
- Fix Micron driver as some chips enable internal ECC correction
during their discovery while they advertize they do not have any.
Hyperbus:
- Restrict the build to only ARM64 SoCs (and compile testing) which is
what should have been done since the beginning.
- Fix Kconfig issue by selection something instead of implying it.
-----BEGIN PGP SIGNATURE-----
iQEzBAABCgAdFiEE9HuaYnbmDhq/XIDIJWrqGEe9VoQFAl1E0XAACgkQJWrqGEe9
VoSVXAf/XyLI00EIj3L2KF8K8iYLPRN+lfbeN/YrFvFd9WYhyjY82NKQ/7A1WVjB
k5VIJx4StnhvVBFj/amviK4NycZcJ8GXz5eQvd5oQYRP5pZ9rBBeed/7QAdQ1uEJ
s8yZyFZKQblFyqTISDsfAmiRmwPipAn5TrBRPvpN094tSxoz8MB4SLvRsUy4FIrr
zj6wGrIbSu2x/G3KUw7yTDAfL9QOdgHaCnmM04TOndoDPC+38yVs8ca/67AP44Ni
j0cYivMZhVpavx2n3G01WUiyXAgkDilaG3F+Tn6754zxfQhJM5tVzZOiwSCBI9FS
Cg2dgcRXfPlJJuD5Vs7aPFIGJHLEFg==
=TWEV
-----END PGP SIGNATURE-----
Merge tag 'mtd/fixes-for-5.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux
Pull MTD fixes from Miquel Raynal:
"NAND:
- Fix Micron driver as some chips enable internal ECC correction
during their discovery while they advertize they do not have any.
Hyperbus:
- Restrict the build to only ARM64 SoCs (and compile testing) which
is what should have been done since the beginning.
- Fix Kconfig issue by selection something instead of implying it"
* tag 'mtd/fixes-for-5.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux:
mtd: hyperbus: Add hardware dependency to AM654 driver
mtd: hyperbus: Kconfig: Fix HBMC_AM654 dependencies
mtd: rawnand: micron: handle on-die "ECC-off" devices correctly
The nr_allocated_banks and allocated banks are initialized as part of
tpm_chip_register. Currently, this is done as part of auto startup
function. However, some drivers, like the ibm vtpm driver, do not run
auto startup during initialization. This results in uninitialized memory
issue and causes a kernel panic during boot.
This patch moves the pcr allocation outside the auto startup function
into tpm_chip_register. This ensures that allocated banks are initialized
in any case.
Fixes: 879b589210 ("tpm: retrieve digest size of unknown algorithms with PCR read")
Reported-by: Michal Suchanek <msuchanek@suse.de>
Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Tested-by: Sachin Sant <sachinp@linux.vnet.ibm.com>
Tested-by: Michal Suchánek <msuchanek@suse.de>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Wire up the new clone3 syscall.
A fix for the PAPR SCM nvdimm driver, to fix a crash when firmware gives us a
device that's attached to a non-online NUMA node.
A fix for a boot failure on 32-bit with KASAN enabled.
Three fixes for implicit fall through warnings, some of which are errors for us
due to -Werror.
Thanks to:
Aneesh Kumar K.V, Christophe Leroy, Kees Cook, Santosh Sivaraj, Stephen
Rothwell.
-----BEGIN PGP SIGNATURE-----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=WT8n
-----END PGP SIGNATURE-----
Merge tag 'powerpc-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Some more powerpc fixes for 5.3:
- Wire up the new clone3 syscall.
- A fix for the PAPR SCM nvdimm driver, to fix a crash when firmware
gives us a device that's attached to a non-online NUMA node.
- A fix for a boot failure on 32-bit with KASAN enabled.
- Three fixes for implicit fall through warnings, some of which are
errors for us due to -Werror.
Thanks to: Aneesh Kumar K.V, Christophe Leroy, Kees Cook, Santosh
Sivaraj, Stephen Rothwell"
* tag 'powerpc-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/kasan: fix early boot failure on PPC32
drivers/macintosh/smu.c: Mark expected switch fall-through
powerpc/spe: Mark expected switch fall-throughs
powerpc/nvdimm: Pick nearby online node if the device node is not online
powerpc/kvm: Fall through switch case explicitly
powerpc: Wire up clone3 syscall
At the end of the v5.3 upstream kernel development cycle, Simon will be
stepping down from his role as Renesas SoC maintainer. Starting with
the v5.4 development cycle, Geert is taking over this role.
Add Geert as a co-maintainer, and add his git repository and branch.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- detect missing missing "WITH Linux-syscall-note" for uapi headers
- fix needless rebuild when using Clang
- fix false-positive cc-option in Kconfig when using Clang
- avoid including corrupted .*.cmd files in the modpost stage
- fix warning of 'make vmlinux'
- fix {m,n,x,g}config to not generate the broken .config on the second
save operation.
- some trivial Makefile fixes
-----BEGIN PGP SIGNATURE-----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=QEIS
-----END PGP SIGNATURE-----
Merge tag 'kbuild-fixes-v5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- detect missing missing "WITH Linux-syscall-note" for uapi headers
- fix needless rebuild when using Clang
- fix false-positive cc-option in Kconfig when using Clang
- avoid including corrupted .*.cmd files in the modpost stage
- fix warning of 'make vmlinux'
- fix {m,n,x,g}config to not generate the broken .config on the second
save operation.
- some trivial Makefile fixes
* tag 'kbuild-fixes-v5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kconfig: Clear "written" flag to avoid data loss
kbuild: Check for unknown options with cc-option usage in Kconfig and clang
lib/raid6: fix unnecessary rebuild of vpermxor*.c
kbuild: modpost: do not parse unnecessary rules for vmlinux modpost
kbuild: modpost: remove unnecessary dependency for __modpost
kbuild: modpost: handle KBUILD_EXTRA_SYMBOLS only for external modules
kbuild: modpost: include .*.cmd files only when targets exist
kbuild: initialize CLANG_FLAGS correctly in the top Makefile
kbuild: detect missing "WITH Linux-syscall-note" for uapi headers
Has not had any bake time or testing, since its just changes to a text file.
-----BEGIN PGP SIGNATURE-----
iQJJBAABCgAzFiEEgvWslnM+qUy+sgVg5n2WYw6TPBAFAl1DIlUVHG1vcnRvbm1A
Y2hyb21pdW0ub3JnAAoJEOZ9lmMOkzwQ3t4P+gKQLv1U/iqVH09K/yu88Di5PwHl
YG9fgiriJ3Ki7tQLqEHk02FFiUkB3UGuD0pBZzR9jG6tcYyjYTwCoguzsflPETuj
u2u+depd8G0lM13LEON8310m3Qxg12Ejiz/llDqQ5bE6+XXAQlMpuKcSMYKWgTuK
Dj+x0IHirZlflp8KSW4qMZJcbEBz7TXenySSE3GjEHcL5YROfef6wOpnI/NECs0+
K6r6v8btrgsGTevY2sDywFAQXBOWepNfWFbn7EwMllUgp5WQEpooS9ijN9hcsn/a
O1b2gCPpRnBitWPF6zhgW10CYjp7fg3Bhyr68BtzhvHKzHyuftG89FwiyZIdZLaC
XseDhUDRoHeJ36JUAP5EA49qnV08Iu4ia4PEwmCNrXj6OoHz04u08enNWBsPv7fZ
sJjoZTE2MBDkALhH3RfDNIrnpwHxFr2Ey3f5lQqDwbp+ACgad2c7CzrwD3x11aIH
cG9rJkwGCdTn3UDw8VRPgxI4Fm/gh2rmZyXjI7uG+2LZqwZp+fbbt0BhQflKeZWi
VWuxxa8KeCwREkkgoyLc5Gfsfkr6/Hxpa18tVyucrdtqnjymY5xB4NEi7yBgy0C8
OGsCoxAmt1DXkEpcFXdiLNe6WMiTvGZ+rKcZA8JLsRzkyqaSNeEVFY+WHDgg6NUw
wmXkBgasHGQ2YlJ9
=bvqJ
-----END PGP SIGNATURE-----
Merge tag 'safesetid-maintainers-correction-5.3-rc2' of git://github.com/micah-morton/linux
Pull SafeSetID maintainer update from Micah Morton:
"Add entry in MAINTAINERS file for SafeSetID LSM"
* tag 'safesetid-maintainers-correction-5.3-rc2' of git://github.com/micah-morton/linux:
Add entry in MAINTAINERS file for SafeSetID LSM
Prior to this commit, starting nconfig, xconfig or gconfig, and saving
the .config file more than once caused data loss, where a .config file
that contained only comments would be written to disk starting from the
second save operation.
This bug manifests itself because the SYMBOL_WRITTEN flag is never
cleared after the first call to conf_write, and subsequent calls to
conf_write then skip all of the configuration symbols due to the
SYMBOL_WRITTEN flag being set.
This commit resolves this issue by clearing the SYMBOL_WRITTEN flag
from all symbols before conf_write returns.
Fixes: 8e2442a5f8 ("kconfig: fix missing choice values in auto.conf")
Cc: linux-stable <stable@vger.kernel.org> # 4.19+
Signed-off-by: M. Vefa Bicakci <m.v.b@runbox.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
- fix build for xtensa cores with coprocessors that was broken by
entry/return abstraction patch.
-----BEGIN PGP SIGNATURE-----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=QOUM
-----END PGP SIGNATURE-----
Merge tag 'xtensa-20190803' of git://github.com/jcmvbkbc/linux-xtensa
Pull Xtensa fix from Max Filippov:
"Fix build for xtensa cores with coprocessors that was broken by
entry/return abstraction patch"
* tag 'xtensa-20190803' of git://github.com/jcmvbkbc/linux-xtensa:
xtensa: fix build for cores with coprocessors
Pull i2c fixes from Wolfram Sang:
"A set of driver fixes for the I2C subsystem"
* 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: s3c2410: Mark expected switch fall-through
i2c: at91: fix clk_offset for sama5d2
i2c: at91: disable TXRDY interrupt after sending data
i2c: iproc: Fix i2c master read more than 63 bytes
eeprom: at24: make spd world-readable again
Pull perf tooling fixes from Thomas Gleixner:
"A set of updates for perf tools and documentation:
perf header:
- Prevent a division by zero
- Deal with an uninitialized warning proper
libbpf:
- Fix the missiong __WORDSIZE definition for musl & al
UAPI headers:
- Synchronize kernel headers
Documentation:
- Fix the memory units for perf.data size"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
libbpf: fix missing __WORDSIZE definition
perf tools: Fix perf.data documentation units for memory size
perf header: Fix use of unitialized value warning
perf header: Fix divide by zero error if f_header.attr_size==0
tools headers UAPI: Sync if_link.h with the kernel
tools headers UAPI: Sync sched.h with the kernel
tools headers UAPI: Sync usbdevice_fs.h with the kernels to get new ioctl
tools perf beauty: Fix usbdevfs_ioctl table generator to handle _IOC()
tools headers UAPI: Update tools's copy of drm.h headers
tools headers UAPI: Update tools's copy of mman.h headers
tools headers UAPI: Update tools's copy of kvm.h headers
tools include UAPI: Sync x86's syscalls_64.tbl and generic unistd.h to pick up clone3 and pidfd_open
Pull vdso timer fixes from Thomas Gleixner:
"A series of commits to deal with the regression caused by the generic
VDSO implementation.
The usage of clock_gettime64() for 32bit compat fallback syscalls
caused seccomp filters to kill innocent processes because they only
allow clock_gettime().
Handle the compat syscalls with clock_gettime() as before, which is
not a functional problem for the VDSO as the legacy compat application
interface is not y2038 safe anyway. It's just extra fallback code
which needs to be implemented on every architecture.
It's opt in for now so that it does not break the compile of already
converted architectures in linux-next. Once these are fixed, the
#ifdeffery goes away.
So much for trying to be smart and reuse code..."
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
arm64: compat: vdso: Use legacy syscalls as fallback
x86/vdso/32: Use 32bit syscall fallback
lib/vdso/32: Provide legacy syscall fallbacks
lib/vdso: Move fallback invocation to the callers
lib/vdso/32: Remove inconsistent NULL pointer checks
Pull irq fixes from Thomas Gleixner:
"A small bunch of fixes from the irqchip department:
- Fix a couple of UAF on error paths (RZA1, GICv3 ITS)
- Fix iMX GPCv2 trigger setting
- Add missing of_node_put() on error path in MBIGEN
- Add another bunch of /* fall-through */ to silence warnings"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/renesas-rza1: Fix an use-after-free in rza1_irqc_probe()
irqchip/irq-imx-gpcv2: Forward irq type to parent
irqchip/irq-mbigen: Add of_node_put() before return
irqchip/gic-v3-its: Free unused vpt_page when alloc vpe table fail
irqchip/gic-v3: Mark expected switch fall-through
Pull xfs fixes from Darrick Wong:
- Avoid leaking kernel stack contents to userspace
- Fix a potential null pointer dereference in the dabtree scrub code
* tag 'xfs-5.3-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: Fix possible null-pointer dereferences in xchk_da_btree_block_check_sibling()
xfs: fix stack contents leakage in the v1 inumber ioctls
Merge misc fixes from Andrew Morton:
"17 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
drivers/acpi/scan.c: document why we don't need the device_hotplug_lock
memremap: move from kernel/ to mm/
lib/test_meminit.c: use GFP_ATOMIC in RCU critical section
asm-generic: fix -Wtype-limits compiler warnings
cgroup: kselftest: relax fs_spec checks
mm/memory_hotplug.c: remove unneeded return for void function
mm/migrate.c: initialize pud_entry in migrate_vma()
coredump: split pipe command whitespace before expanding template
page flags: prioritize kasan bits over last-cpuid
ubsan: build ubsan.c more conservatively
kasan: remove clang version check for KASAN_STACK
mm: compaction: avoid 100% CPU usage during compaction when a task is killed
mm: migrate: fix reference check race between __find_get_block() and migration
mm: vmscan: check if mem cgroup is disabled or not before calling memcg slab shrinker
ocfs2: remove set but not used variable 'last_hash'
Revert "kmemleak: allow to coexist with fault injection"
kernel/signal.c: fix a kernel-doc markup
Three minor RISC-V-related changes for v5.3-rc3:
- Add build ID to VDSO builds to avoid a double-free in perf when
libelf isn't used
- Align the RV64 defconfig to the output of "make savedefconfig" so
subsequent defconfig patches don't get out of hand
- Drop a superfluous DT property from the FU540 SoC DT data (since it
must be already set in board data that includes it)
-----BEGIN PGP SIGNATURE-----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=CIhE
-----END PGP SIGNATURE-----
Merge tag 'riscv/for-v5.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Paul Walmsley:
"Three minor RISC-V-related changes for v5.3-rc3:
- Add build ID to VDSO builds to avoid a double-free in perf when
libelf isn't used
- Align the RV64 defconfig to the output of "make savedefconfig" so
subsequent defconfig patches don't get out of hand
- Drop a superfluous DT property from the FU540 SoC DT data (since it
must be already set in board data that includes it)"
* tag 'riscv/for-v5.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: defconfig: align RV64 defconfig to the output of "make savedefconfig"
riscv: dts: fu540-c000: drop "timebase-frequency"
riscv: Fix perf record without libelf support
Let's document why the lock is not needed in acpi_scan_init(), right now
this is not really obvious.
[akpm@linux-foundation.org: fix tpyo]
Link: http://lkml.kernel.org/r/20190731135306.31524-1-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
memremap.c implements MM functionality for ZONE_DEVICE, so it really
should be in the mm/ directory, not the kernel/ one.
Link: http://lkml.kernel.org/r/20190722094143.18387-1-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
kmalloc() shouldn't sleep while in RCU critical section, therefore use
GFP_ATOMIC instead of GFP_KERNEL.
The bug was spotted by the 0day kernel testing robot.
Link: http://lkml.kernel.org/r/20190725121703.210874-1-glider@google.com
Fixes: 7e659650cbda ("lib: introduce test_meminit module")
Signed-off-by: Alexander Potapenko <glider@google.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reported-by: kernel test robot <lkp@intel.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit d66acc39c7 ("bitops: Optimise get_order()") introduced a
compilation warning because "rx_frag_size" is an "ushort" while
PAGE_SHIFT here is 16.
The commit changed the get_order() to be a multi-line macro where
compilers insist to check all statements in the macro even when
__builtin_constant_p(rx_frag_size) will return false as "rx_frag_size"
is a module parameter.
In file included from ./arch/powerpc/include/asm/page_64.h:107,
from ./arch/powerpc/include/asm/page.h:242,
from ./arch/powerpc/include/asm/mmu.h:132,
from ./arch/powerpc/include/asm/lppaca.h:47,
from ./arch/powerpc/include/asm/paca.h:17,
from ./arch/powerpc/include/asm/current.h:13,
from ./include/linux/thread_info.h:21,
from ./arch/powerpc/include/asm/processor.h:39,
from ./include/linux/prefetch.h:15,
from drivers/net/ethernet/emulex/benet/be_main.c:14:
drivers/net/ethernet/emulex/benet/be_main.c: In function 'be_rx_cqs_create':
./include/asm-generic/getorder.h:54:9: warning: comparison is always
true due to limited range of data type [-Wtype-limits]
(((n) < (1UL << PAGE_SHIFT)) ? 0 : \
^
drivers/net/ethernet/emulex/benet/be_main.c:3138:33: note: in expansion
of macro 'get_order'
adapter->big_page_size = (1 << get_order(rx_frag_size)) * PAGE_SIZE;
^~~~~~~~~
Fix it by moving all of this multi-line macro into a proper function,
and killing __get_order() off.
[akpm@linux-foundation.org: remove __get_order() altogether]
[cai@lca.pw: v2]
Link: http://lkml.kernel.org/r/1564000166-31428-1-git-send-email-cai@lca.pw
Link: http://lkml.kernel.org/r/1563914986-26502-1-git-send-email-cai@lca.pw
Fixes: d66acc39c7 ("bitops: Optimise get_order()")
Signed-off-by: Qian Cai <cai@lca.pw>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: David Howells <dhowells@redhat.com>
Cc: Jakub Jelinek <jakub@redhat.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Bill Wendling <morbo@google.com>
Cc: James Y Knight <jyknight@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
On my laptop most memcg kselftests were being skipped because it claimed
cgroup v2 hierarchy wasn't mounted, but this isn't correct. Instead, it
seems current systemd HEAD mounts it with the name "cgroup2" instead of
"cgroup":
% grep cgroup /proc/mounts
cgroup2 /sys/fs/cgroup cgroup2 rw,nosuid,nodev,noexec,relatime,nsdelegate 0 0
I can't think of a reason to need to check fs_spec explicitly
since it's arbitrary, so we can just rely on fs_vfstype.
After these changes, `make TARGETS=cgroup kselftest` actually runs the
cgroup v2 tests in more cases.
Link: http://lkml.kernel.org/r/20190723210737.GA487@chrisdown.name
Signed-off-by: Chris Down <chris@chrisdown.name>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Roman Gushchin <guro@fb.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
return is unneeded in void function
Link: http://lkml.kernel.org/r/20190723130814.21826-1-houweitaoo@gmail.com
Signed-off-by: Weitao Hou <houweitaoo@gmail.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When CONFIG_MIGRATE_VMA_HELPER is enabled, migrate_vma() calls
migrate_vma_collect() which initializes a struct mm_walk but didn't
initialize mm_walk.pud_entry. (Found by code inspection) Use a C
structure initialization to make sure it is set to NULL.
Link: http://lkml.kernel.org/r/20190719233225.12243-1-rcampbell@nvidia.com
Fixes: 8763cb45ab ("mm/migrate: new memory migration helper for use with device memory")
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Save the offsets of the start of each argument to avoid having to update
pointers to each argument after every corename krealloc and to avoid
having to duplicate the memory for the dump command.
Executable names containing spaces were previously being expanded from
%e or %E and then split in the middle of the filename. This is
incorrect behaviour since an argument list can represent arguments with
spaces.
The splitting could lead to extra arguments being passed to the core
dump handler that it might have interpreted as options or ignored
completely.
Core dump handlers that are not aware of this Linux kernel issue will be
using %e or %E without considering that it may be split and so they will
be vulnerable to processes with spaces in their names breaking their
argument list. If their internals are otherwise well written, such as
if they are written in shell but quote arguments, they will work better
after this change than before. If they are not well written, then there
is a slight chance of breakage depending on the details of the code but
they will already be fairly broken by the split filenames.
Core dump handlers that are aware of this Linux kernel issue will be
placing %e or %E as the last item in their core_pattern and then
aggregating all of the remaining arguments into one, separated by
spaces. Alternatively they will be obtaining the filename via other
methods. Both of these will be compatible with the new arrangement.
A side effect from this change is that unknown template types (for
example %z) result in an empty argument to the dump handler instead of
the argument being dropped. This is a desired change as:
It is easier for dump handlers to process empty arguments than dropped
ones, especially if they are written in shell or don't pass each
template item with a preceding command-line option in order to
differentiate between individual template types. Most core_patterns in
the wild do not use options so they can confuse different template types
(especially numeric ones) if an earlier one gets dropped in old kernels.
If the kernel introduces a new template type and a core_pattern uses it,
the core dump handler might not expect that the argument can be dropped
in old kernels.
For example, this can result in security issues when %d is dropped in
old kernels. This happened with the corekeeper package in Debian and
resulted in the interface between corekeeper and Linux having to be
rewritten to use command-line options to differentiate between template
types.
The core_pattern for most core dump handlers is written by the handler
author who would generally not insert unknown template types so this
change should be compatible with all the core dump handlers that exist.
Link: http://lkml.kernel.org/r/20190528051142.24939-1-pabs3@bonedaddy.net
Fixes: 74aadce986 ("core_pattern: allow passing of arguments to user mode helper when core_pattern is a pipe")
Signed-off-by: Paul Wise <pabs3@bonedaddy.net>
Reported-by: Jakub Wilk <jwilk@jwilk.net> [https://bugs.debian.org/924398]
Reported-by: Paul Wise <pabs3@bonedaddy.net> [https://lore.kernel.org/linux-fsdevel/c8b7ecb8508895bf4adb62a748e2ea2c71854597.camel@bonedaddy.net/]
Suggested-by: Jakub Wilk <jwilk@jwilk.net>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
ARM64 randdconfig builds regularly run into a build error, especially
when NUMA_BALANCING and SPARSEMEM are enabled but not SPARSEMEM_VMEMMAP:
#error "KASAN: not enough bits in page flags for tag"
The last-cpuid bits are already contitional on the available space, so
the result of the calculation is a bit random on whether they were
already left out or not.
Adding the kasan tag bits before last-cpuid makes it much more likely to
end up with a successful build here, and should be reliable for
randconfig at least, as long as that does not randomize NR_CPUS or
NODES_SHIFT but uses the defaults.
In order for the modified check to not trigger in the x86 vdso32 code
where all constants are wrong (building with -m32), enclose all the
definitions with an #ifdef.
[arnd@arndb.de: build fix]
Link: http://lkml.kernel.org/r/CAK8P3a3Mno1SWTcuAOT0Wa9VS15pdU6EfnkxLbDpyS55yO04+g@mail.gmail.com
Link: http://lkml.kernel.org/r/20190722115520.3743282-1-arnd@arndb.de
Link: https://lore.kernel.org/lkml/20190618095347.3850490-1-arnd@arndb.de/
Fixes: 2813b9c029 ("kasan, mm, arm64: tag non slab memory allocated via pagealloc")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
objtool points out several conditions that it does not like, depending
on the combination with other configuration options and compiler
variants:
stack protector:
lib/ubsan.o: warning: objtool: __ubsan_handle_type_mismatch()+0xbf: call to __stack_chk_fail() with UACCESS enabled
lib/ubsan.o: warning: objtool: __ubsan_handle_type_mismatch_v1()+0xbe: call to __stack_chk_fail() with UACCESS enabled
stackleak plugin:
lib/ubsan.o: warning: objtool: __ubsan_handle_type_mismatch()+0x4a: call to stackleak_track_stack() with UACCESS enabled
lib/ubsan.o: warning: objtool: __ubsan_handle_type_mismatch_v1()+0x4a: call to stackleak_track_stack() with UACCESS enabled
kasan:
lib/ubsan.o: warning: objtool: __ubsan_handle_type_mismatch()+0x25: call to memcpy() with UACCESS enabled
lib/ubsan.o: warning: objtool: __ubsan_handle_type_mismatch_v1()+0x25: call to memcpy() with UACCESS enabled
The stackleak and kasan options just need to be disabled for this file
as we do for other files already. For the stack protector, we already
attempt to disable it, but this fails on clang because the check is
mixed with the gcc specific -fno-conserve-stack option. According to
Andrey Ryabinin, that option is not even needed, dropping it here fixes
the stackprotector issue.
Link: http://lkml.kernel.org/r/20190722125139.1335385-1-arnd@arndb.de
Link: https://lore.kernel.org/lkml/20190617123109.667090-1-arnd@arndb.de/t/
Link: https://lore.kernel.org/lkml/20190722091050.2188664-1-arnd@arndb.de/t/
Fixes: d08965a27e ("x86/uaccess, ubsan: Fix UBSAN vs. SMAP")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
asan-stack mode still uses dangerously large kernel stacks of tens of
kilobytes in some drivers, and it does not seem that anyone is working
on the clang bug.
Turn it off for all clang versions to prevent users from accidentally
enabling it once they update to clang-9, and to help automated build
testing with clang-9.
Link: https://bugs.llvm.org/show_bug.cgi?id=38809
Link: http://lkml.kernel.org/r/20190719200347.2596375-1-arnd@arndb.de
Fixes: 6baec880d7 ("kasan: turn off asan-stack for clang-8 and earlier")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
"howaboutsynergy" reported via kernel buzilla number 204165 that
compact_zone_order was consuming 100% CPU during a stress test for
prolonged periods of time. Specifically the following command, which
should exit in 10 seconds, was taking an excessive time to finish while
the CPU was pegged at 100%.
stress -m 220 --vm-bytes 1000000000 --timeout 10
Tracing indicated a pattern as follows
stress-3923 [007] 519.106208: mm_compaction_isolate_migratepages: range=(0x70bb80 ~ 0x70bb80) nr_scanned=0 nr_taken=0
stress-3923 [007] 519.106212: mm_compaction_isolate_migratepages: range=(0x70bb80 ~ 0x70bb80) nr_scanned=0 nr_taken=0
stress-3923 [007] 519.106216: mm_compaction_isolate_migratepages: range=(0x70bb80 ~ 0x70bb80) nr_scanned=0 nr_taken=0
stress-3923 [007] 519.106219: mm_compaction_isolate_migratepages: range=(0x70bb80 ~ 0x70bb80) nr_scanned=0 nr_taken=0
stress-3923 [007] 519.106223: mm_compaction_isolate_migratepages: range=(0x70bb80 ~ 0x70bb80) nr_scanned=0 nr_taken=0
stress-3923 [007] 519.106227: mm_compaction_isolate_migratepages: range=(0x70bb80 ~ 0x70bb80) nr_scanned=0 nr_taken=0
stress-3923 [007] 519.106231: mm_compaction_isolate_migratepages: range=(0x70bb80 ~ 0x70bb80) nr_scanned=0 nr_taken=0
stress-3923 [007] 519.106235: mm_compaction_isolate_migratepages: range=(0x70bb80 ~ 0x70bb80) nr_scanned=0 nr_taken=0
stress-3923 [007] 519.106238: mm_compaction_isolate_migratepages: range=(0x70bb80 ~ 0x70bb80) nr_scanned=0 nr_taken=0
stress-3923 [007] 519.106242: mm_compaction_isolate_migratepages: range=(0x70bb80 ~ 0x70bb80) nr_scanned=0 nr_taken=0
Note that compaction is entered in rapid succession while scanning and
isolating nothing. The problem is that when a task that is compacting
receives a fatal signal, it retries indefinitely instead of exiting
while making no progress as a fatal signal is pending.
It's not easy to trigger this condition although enabling zswap helps on
the basis that the timing is altered. A very small window has to be hit
for the problem to occur (signal delivered while compacting and
isolating a PFN for migration that is not aligned to SWAP_CLUSTER_MAX).
This was reproduced locally -- 16G single socket system, 8G swap, 30%
zswap configured, vm-bytes 22000000000 using Colin Kings stress-ng
implementation from github running in a loop until the problem hits).
Tracing recorded the problem occurring almost 200K times in a short
window. With this patch, the problem hit 4 times but the task existed
normally instead of consuming CPU.
This problem has existed for some time but it was made worse by commit
cf66f0700c ("mm, compaction: do not consider a need to reschedule as
contention"). Before that commit, if the same condition was hit then
locks would be quickly contended and compaction would exit that way.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=204165
Link: http://lkml.kernel.org/r/20190718085708.GE24383@techsingularity.net
Fixes: cf66f0700c ("mm, compaction: do not consider a need to reschedule as contention")
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Cc: <stable@vger.kernel.org> [5.1+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
buffer_migrate_page_norefs() can race with bh users in the following
way:
CPU1 CPU2
buffer_migrate_page_norefs()
buffer_migrate_lock_buffers()
checks bh refs
spin_unlock(&mapping->private_lock)
__find_get_block()
spin_lock(&mapping->private_lock)
grab bh ref
spin_unlock(&mapping->private_lock)
move page do bh work
This can result in various issues like lost updates to buffers (i.e.
metadata corruption) or use after free issues for the old page.
This patch closes the race by holding mapping->private_lock while the
mapping is being moved to a new page. Ordinarily, a reference can be
taken outside of the private_lock using the per-cpu BH LRU but the
references are checked and the LRU invalidated if necessary. The
private_lock is held once the references are known so the buffer lookup
slow path will spin on the private_lock. Between the page lock and
private_lock, it should be impossible for other references to be
acquired and updates to happen during the migration.
A user had reported data corruption issues on a distribution kernel with
a similar page migration implementation as mainline. The data
corruption could not be reproduced with this patch applied. A small
number of migration-intensive tests were run and no performance problems
were noted.
[mgorman@techsingularity.net: Changelog, removed tracing]
Link: http://lkml.kernel.org/r/20190718090238.GF24383@techsingularity.net
Fixes: 89cb0888ca "mm: migrate: provide buffer_migrate_page_norefs()"
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Cc: <stable@vger.kernel.org> [5.0+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Shakeel Butt reported premature oom on kernel with
"cgroup_disable=memory" since mem_cgroup_is_root() returns false even
though memcg is actually NULL. The drop_caches is also broken.
It is because commit aeed1d325d ("mm/vmscan.c: generalize
shrink_slab() calls in shrink_node()") removed the !memcg check before
!mem_cgroup_is_root(). And, surprisingly root memcg is allocated even
though memory cgroup is disabled by kernel boot parameter.
Add mem_cgroup_disabled() check to make reclaimer work as expected.
Link: http://lkml.kernel.org/r/1563385526-20805-1-git-send-email-yang.shi@linux.alibaba.com
Fixes: aeed1d325d ("mm/vmscan.c: generalize shrink_slab() calls in shrink_node()")
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
Reported-by: Shakeel Butt <shakeelb@google.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Jan Hadrava <had@kam.mff.cuni.cz>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Roman Gushchin <guro@fb.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: <stable@vger.kernel.org> [4.19+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fixes gcc '-Wunused-but-set-variable' warning:
fs/ocfs2/xattr.c: In function ocfs2_xattr_bucket_find:
fs/ocfs2/xattr.c:3828:6: warning: variable last_hash set but not used [-Wunused-but-set-variable]
It's never used and can be removed.
Link: http://lkml.kernel.org/r/20190716132110.34836-1-yuehaibing@huawei.com
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When running ltp's oom test with kmemleak enabled, the below warning was
triggerred since kernel detects __GFP_NOFAIL & ~__GFP_DIRECT_RECLAIM is
passed in:
WARNING: CPU: 105 PID: 2138 at mm/page_alloc.c:4608 __alloc_pages_nodemask+0x1c31/0x1d50
Modules linked in: loop dax_pmem dax_pmem_core ip_tables x_tables xfs virtio_net net_failover virtio_blk failover ata_generic virtio_pci virtio_ring virtio libata
CPU: 105 PID: 2138 Comm: oom01 Not tainted 5.2.0-next-20190710+ #7
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.10.2-0-g5f4c7b1-prebuilt.qemu-project.org 04/01/2014
RIP: 0010:__alloc_pages_nodemask+0x1c31/0x1d50
...
kmemleak_alloc+0x4e/0xb0
kmem_cache_alloc+0x2a7/0x3e0
mempool_alloc_slab+0x2d/0x40
mempool_alloc+0x118/0x2b0
bio_alloc_bioset+0x19d/0x350
get_swap_bio+0x80/0x230
__swap_writepage+0x5ff/0xb20
The mempool_alloc_slab() clears __GFP_DIRECT_RECLAIM, however kmemleak
has __GFP_NOFAIL set all the time due to d9570ee3bd ("kmemleak:
allow to coexist with fault injection"). But, it doesn't make any sense
to have __GFP_NOFAIL and ~__GFP_DIRECT_RECLAIM specified at the same
time.
According to the discussion on the mailing list, the commit should be
reverted for short term solution. Catalin Marinas would follow up with
a better solution for longer term.
The failure rate of kmemleak metadata allocation may increase in some
circumstances, but this should be expected side effect.
Link: http://lkml.kernel.org/r/1563299431-111710-1-git-send-email-yang.shi@linux.alibaba.com
Fixes: d9570ee3bd ("kmemleak: allow to coexist with fault injection")
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Qian Cai <cai@lca.pw>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The kernel-doc parser doesn't handle expressions with %foo*. Instead,
when an asterisk should be part of a constant, it uses an alternative
notation: `foo*`.
Link: http://lkml.kernel.org/r/7f18c2e0b5e39e6b7eb55ddeb043b8b260b49f2d.1563361575.git.mchehab+samsung@kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
intel fixes (didn't have any ever since the main merge window pull):
- gvt fixes (2 cc: stable)
- fix gpu reset vs mm-shrinker vs wakeup fun (needed a few patches)
- two gem locking fixes (one cc: stable)
- pile of misc fixes all over with minor impact, 6 cc: stable, others
from this window
exynos:
- misc minor fixes
misc:
- some build/Kconfig fixes
- regression fix for vm scalability perf test which seems to mostly
exercise dmesg/console logging ...
- the vgem cache flush fix for arm64 broke the world on x86, so that's
reverted again
-----BEGIN PGP SIGNATURE-----
iQIzBAABCgAdFiEEb4nG6jLu8Y5XI+PfTA9ye/CYqnEFAl1Eh6UACgkQTA9ye/CY
qnEr0xAAoCm/z3Y02494iuWfHTnSM3ILEILRoKur3ewaYg7u5qLppdFSCPN92EIC
M3ODjNLaYSIJWB+mT6II9tdPzARL2Uug5ItJBE0OtnJmexYIdkBDc7GlctfW3ENB
KFcW2i3MrA1lrNC69snzO0uWtchfkuXvFH0W8q6l+n5y8Yevcqs12XYZbYQYpV4Z
KHScTggWQ2owjKBTDDZ1zYtp+pkto/CUlL2ln6b32T27YtdJIc4vtqB0+sR5iThx
KCduQR897WOjueOIsy/qyhg45cC5Eci28HXTMoh/HVjG1igmAAPhapWH48Yrfkdu
bSbwbBAaA6OGv+7yWCESpl7Au2KCtQ26nDESOIP4KDl+Kl5uAgoiDTIyCVLI7b6p
gYH88LhL7UJKvvej7BtHrQy6BMZElznRWVtEESfCuyk8wn/cAxJNOxbdNIWIUjha
NDUTdyZOuY8C8xGDdLLFWX7mn/1lkVFxxTRlx2lgKJROAfjA+CsohgXeMTsStqdX
W4Mx/3Q8oBELcsUMGL/+N3vZGPIckk6trs0SteV6J3XaOduWClAQA9KV4JHb7JOq
tVC88MkxXK0bZAT9W6sSM5KOmZo6t7XiaP2QZAd5vWljaMPov489e40RK0ZFmKPW
xfhWBxNdaTeu7d0X+25oOUBmroUnnGSukOLJheGISwTBDAlkp7U=
=2TGW
-----END PGP SIGNATURE-----
Merge tag 'drm-fixes-2019-08-02-1' of git://anongit.freedesktop.org/drm/drm
Pull more drm fixes from Daniel Vetter:
"Dave sends his pull, everyone realizes they've been asleep at the
wheel and hits send on their own pulls :-/
Normally I'd just ignore these all because w/e for me and Dave. But
this time around the latecomers also included drm-intel-fixes, which
failed to send out a -fixes pull thus far for this release (screwed up
vacation coverage, despite that 2/3 maintainers were around ... they
all look appropriately guilty), and that really is overdue to get
landed.
And since I had to do a pull request anyway I pulled the other two
late ones too.
intel fixes (didn't have any ever since the main merge window pull):
- gvt fixes (2 cc: stable)
- fix gpu reset vs mm-shrinker vs wakeup fun (needed a few patches)
- two gem locking fixes (one cc: stable)
- pile of misc fixes all over with minor impact, 6 cc: stable, others
from this window
exynos:
- misc minor fixes
misc:
- some build/Kconfig fixes
- regression fix for vm scalability perf test which seems to mostly
exercise dmesg/console logging ...
- the vgem cache flush fix for arm64 broke the world on x86, so
that's reverted again
* tag 'drm-fixes-2019-08-02-1' of git://anongit.freedesktop.org/drm/drm: (42 commits)
Revert "drm/vgem: fix cache synchronization on arm/arm64"
drm/exynos: fix missing decrement of retry counter
drm/exynos: add CONFIG_MMU dependency
drm/exynos: remove redundant assignment to pointer 'node'
drm/exynos: using dev_get_drvdata directly
drm/bochs: Use shadow buffer for bochs framebuffer console
drm/fb-helper: Instanciate shadow FB if configured in device's mode_config
drm/fb-helper: Map DRM client buffer only when required
drm/client: Support unmapping of DRM client buffers
drm/i915: Only recover active engines
drm/i915: Add a wakeref getter for iff the wakeref is already active
drm/i915: Lift intel_engines_resume() to callers
drm/vgem: fix cache synchronization on arm/arm64
drm/i810: Use CONFIG_PREEMPTION
drm/bridge: tc358764: Fix build error
drm/bridge: lvds-encoder: Fix build error while CONFIG_DRM_KMS_HELPER=m
drm/i915/gvt: Adding ppgtt to GVT GEM context after shadow pdps settled.
drm/i915/gvt: grab runtime pm first for forcewake use
drm/i915/gvt: fix incorrect cache entry for guest page mapping
drm/i915/gvt: Checking workload's gma earlier
...
-----BEGIN PGP SIGNATURE-----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=pIeX
-----END PGP SIGNATURE-----
Merge tag 'selinux-pr-20190801' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
Pull selinux fix from Paul Moore:
"One more small fix for a potential memory leak in an error path"
* tag 'selinux-pr-20190801' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
selinux: fix memory leak in policydb_init()
The hbmc-am654 driver is for the TI AM654, which is an ARM64 SoC, so
don't propose this driver on other architectures unless
build-testing.
Fixes: b07079f164 ("mtd: hyperbus: Add driver for TI's HyperBus memory controller")
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
On x86_64, when CONFIG_OF is not disabled:
WARNING: unmet direct dependencies detected for MUX_MMIO
Depends on [n]: MULTIPLEXER [=y] && (OF [=n] || COMPILE_TEST [=n])
Selected by [y]:
- HBMC_AM654 [=y] && MTD [=y] && MTD_HYPERBUS [=y]
due to
config HBMC_AM654
tristate "HyperBus controller driver for AM65x SoC"
select MULTIPLEXER
select MUX_MMIO
Fix this by making HBMC_AM654 imply MUX_MMIO instead of select so
that dependencies are taken care of. MUX_MMIO is optional for
functioning of driver.
Fixes: b07079f164 ("mtd: hyperbus: Add driver for TI's HyperBus memory controller")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Some devices are not supposed to support on-die ECC but experience
shows that internal ECC machinery can actually be enabled through the
"SET FEATURE (EFh)" command, even if a read of the "READ ID Parameter
Tables" returns that it is not.
Currently, the driver checks the "READ ID Parameter" field directly
after having enabled the feature. If the check fails it returns
immediately but leaves the ECC on. When using buggy chips like
MT29F2G08ABAGA and MT29F2G08ABBGA, all future read/program cycles will
go through the on-die ECC, confusing the host controller which is
supposed to be the one handling correction.
To address this in a common way we need to turn off the on-die ECC
directly after reading the "READ ID Parameter" and before checking the
"ECC status".
Cc: stable@vger.kernel.org
Fixes: dbc44edbf8 ("mtd: rawnand: micron: Fix on-die ECC detection logic")
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Bart Van Assche