22 Jun, 2016
3 commits
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The `events_limit` variable needs to be formatted with %lld and not %ld.
This fixes the following warning discovered by kbuild test robot:kernel/cgroup_pids.c: In function 'pids_events_show':
kernel/cgroup_pids.c:313:24: warning: format '%ld' expects argument of type
'long int', but argument 3 has type 'long long int' [-Wformat=]
seq_printf(sf, "max %ld\n", atomic64_read(&pids->events_limit));
^tj: Added explicit (s64) cast as atomic64 switches between long long
and long depending on 32 or 64.Signed-off-by: Kenny Yu
Signed-off-by: Tejun Heo -
This patch adds more visibility into the pids controller when the controller
rejects a fork request. Whenever fork fails because the limit on the number of
pids in the cgroup is reached, the controller will log this and also notify the
newly added cgroups events file. The `max` key in the events file represents
the number of times fork failed because of the pids controller.This change also logs only the first time the `max` event counter is
incremented. This is to provide a hint to the user to understand why fork
failed, as users are not yet used to seeing fork failures because of the
pids controller.Signed-off-by: Kenny Yu
Acked-by: Johannes Weiner cmpxchg.org>
Signed-off-by: Tejun Heo -
cgroup core expected css_alloc to return an ERR_PTR value on failure
and caused NULL deref if it returned NULL. It's an easy mistake to
make from an alloc function and there's no ambiguity in what's being
indicated. Update css_create() so that it interprets NULL return from
css_alloc as -ENOMEM.Signed-off-by: Tejun Heo
18 Jun, 2016
2 commits
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css_idr allocation starts at 1, so index 0 will never point to an
item. css_from_id() currently filters that before asking idr_find(),
but idr_find() would also just return NULL, so this is not needed.Signed-off-by: Johannes Weiner
Signed-off-by: Tejun Heo -
The valid cgroup hierarchy ID range includes 0, so we can't filter for
positive numbers when freeing it, or it'll leak the first ID. No big
deal, just disruptive when reading the code.The ID is freed during error handling and when the reference count
hits zero, so the double-free test is not necessary; remove it.Signed-off-by: Johannes Weiner
Signed-off-by: Tejun Heo
14 Jun, 2016
2 commits
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Pull percpu fixes from Tejun Heo:
"While adding GFP_ATOMIC support to the percpu allocator, the
synchronization for the fast-path which doesn't require external
allocations was separated into pcpu_lock.Unfortunately, it incorrectly decoupled async paths and percpu
chunks could get destroyed while still being operated on. This
contains two patches to fix the bug"* 'for-4.7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
percpu: fix synchronization between synchronous map extension and chunk destruction
percpu: fix synchronization between chunk->map_extend_work and chunk destruction -
…git/broonie/regulator
Pull regulator fixes from Mark Brown:
"Some driver specific fixes for the regulator subsystem:- Some of the changes to the core that were merged in the last merge
window exposed the fact that the qcom-smd driver hadn't implemented
the voltage enumeration interfaces like it should. Since it's a
simple driver specific fix to implement them do that.- Fix the ramp delay configuration for tps51632"
* tag 'regulator-fix-v4.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: qcom_smd: add list_voltage callback
regulator: qcom_smd: add regulator ops for pm8941 lnldo
regulator: qcom_smd: add list_voltage callback
regulator: tps51632: Fix setting ramp delay
13 Jun, 2016
2 commits
-
…632' into regulator-linus
-
This patch adds support to list_voltage callback, so that consumers
like mmc core, can get information of supported voltage range.Without this patch there is no way for mmc core to know this voltage range.
Signed-off-by: Srinivas Kandagatla
Signed-off-by: Mark Brown
12 Jun, 2016
8 commits
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Pull thermal management fixes from Zhang Rui:
- fix an ordering issue in cpu cooling that cooling device is
registered before it's ready (freq_table being populated).
(Lukasz Luba)- fix a missing comment update (Caesar Wang)
* 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
thermal: add the note for set_trip_temp
thermal: cpu_cooling: fix improper order during initialization -
Pull block layer fixes from Jens Axboe:
"A small collection of fixes for the current series. This contains:- Two fixes for xen-blkfront, from Bob Liu.
- A bug fix for NVMe, releasing only the specific resources we
requested.- Fix for a debugfs flags entry for nbd, from Josef.
- Plug fix from Omar, fixing up a case of code being switched between
two functions.- A missing bio_put() for the new discard callers of
submit_bio_wait(), fixing a regression causing a leak of the bio.
From Shaun.- Improve dirty limit calculation precision in the writeback code,
fixing a case where setting a limit lower than 1% of memory would
end up being zero. From Tejun"* 'for-linus' of git://git.kernel.dk/linux-block:
NVMe: Only release requested regions
xen-blkfront: fix resume issues after a migration
xen-blkfront: don't call talk_to_blkback when already connected to blkback
nbd: pass the nbd pointer for flags debugfs
block: missing bio_put following submit_bio_wait
blk-mq: really fix plug list flushing for nomerge queues
writeback: use higher precision calculation in domain_dirty_limits() -
Pull GPIO fixes from Linus Walleij:
"A new bunch of GPIO fixes for v4.7.This time I am very grateful that Ricardo Ribalda Delgado went in and
fixed my stupid refcounting mistakes in the removal path for GPIO
chips. I had a feeling something was wrong here and so it was. It
exploded on OMAP and it fixes their problem. Now it should be (more)
solid.The rest i compilation, Kconfig and driver fixes. Some tagged for
stable.Summary:
- Fix a NULL pointer dereference when we are searching the GPIO
device list but one of the devices have been removed (struct
gpio_chip pointer is NULL).- Fix unaligned reference counters: we were ending on +3 after all
said and done. It should be 0. Remove an extraneous get_device(),
and call cdev_del() followed by device_del() in gpiochip_remove()
instead and the count goes to zero and calls the release() function
properly.- Fix a compile warning due to a missing #include in the OF/device
tree portions.- Select ANON_INODES for GPIOLIB, we're using that for our character
device. Some randconfig tests disclosed the problem.- Make sure the Zynq driver clock runs also without CONFIG_PM enabled
- Fix an off-by-one error in the 104-DIO-48E driver
- Fix warnings in bcm_kona_gpio_reset()"
* tag 'gpio-v4.7-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: bcm-kona: fix bcm_kona_gpio_reset() warnings
gpio: select ANON_INODES
gpio: include in gpiolib-of
gpiolib: Fix unaligned used of reference counters
gpiolib: Fix NULL pointer deference
gpio: zynq: initialize clock even without CONFIG_PM
gpio: 104-dio-48e: Fix control port offset computation off-by-one error -
Pull SCSI fixes from James Bottomley:
"Two current fixes:- one affects Qemu CD ROM emulation, which stopped working after the
updates in SCSI to require VPD pages from all conformant devices.Fix temporarily by blacklisting Qemu (we can relax later when they
come into compliance).- The other is a fix to the optimal transfer size. We set up a
minefield for ourselves by being confused about whether the limits
are in bytes or sectors (SCSI optimal is in blocks and the queue
parameter is in bytes).This tries to fix the problem (wrong setting for queue limits
max_sectors) and make the problem more obvious by introducing a
wrapper function"* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
sd: Fix rw_max for devices that report an optimal xfer size
scsi: Add QEMU CD-ROM to VPD Inquiry Blacklist -
Pull i2c fixes from Wolfram Sang:
- a bigger fix for i801 to finally be able to be loaded on some
machines again- smaller driver fixes
- documentation update because of a renamed file
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: mux: reg: Provide of_match_table
i2c: mux: refer to i2c-mux.txt
i2c: octeon: Avoid printk after too long SMBUS message
i2c: octeon: Missing AAK flag in case of I2C_M_RECV_LEN
i2c: i801: Allow ACPI SystemIO OpRegion to conflict with PCI BAR -
Pull DeviceTree fixes from Rob Herring:
- fix unflatten_dt_nodes when dad parameter is set.
- add vendor prefixes for TechNexion and UniWest
- documentation fix for Marvell BT
- OF IRQ kerneldoc fixes
- restrict CMA alignment adjustments to non dma-coherent
- a couple of warning fixes in reserved-memory code
- DT maintainers updates
* tag 'devicetree-fixes-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
drivers: of: add definition of early_init_dt_alloc_reserved_memory_arch
drivers/of: Fix depth for sub-tree blob in unflatten_dt_nodes()
drivers: of: Fix of_pci.h header guard
dt-bindings: Add vendor prefix for TechNexion
of: add vendor prefix for UniWest
dt: bindings: fix documentation for MARVELL's bt-sd8xxx wireless device
of: add missing const for of_parse_phandle_with_args() in !CONFIG_OF
of: silence warnings due to max() usage
drivers: of: of_reserved_mem: fixup the CMA alignment not to affect dma-coherent
of: irq: fix of_irq_get[_byname]() kernel-doc
MAINTAINERS: DeviceTree maintainer updates -
…kernel/git/luto/linux
Pull uvc compat XU ioctl fixes from Andy Lutomirski:
"uvc's compat XU ioctls go through tons of potentially buggy
indirection. The first patch removes the indirection. The second one
cleans up the code.Compile-tested only. I have the hardware, but I have absolutely no
idea what XU does, how to use it, what software to recompile as
32-bit, or what to test in that software"* tag '20160610_uvc_compat_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/luto/linux:
uvc_v4l2: Simplify compat ioctl implementation
uvc: Forward compat ioctls to their handlers directly
11 Jun, 2016
16 commits
-
The uvc compat ioctl implementation seems to have copied user data
for no good reason. Remove a bunch of copies.Signed-off-by: Andy Lutomirski
-
The current code goes through a lot of indirection just to call a
known handler. Simplify it: just call the handlers directly.Cc: stable@vger.kernel.org
Signed-off-by: Andy Lutomirski -
Pull btrfs fixes from Chris Mason:
"Has some fixes and some new self tests for btrfs. The self tests are
usually disabled in the .config file (unless you're doing btrfs dev
work), and this bunch is meant to find problems with the 64K page size
patches.Jeff has a patch to help people see if they are using the hardware
assist crc32c module, which really helps us nail down problems when
people ask why crcs are using so much CPU.Otherwise, it's small fixes"
* 'for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: self-tests: Fix extent buffer bitmap test fail on BE system
Btrfs: self-tests: Fix test_bitmaps fail on 64k sectorsize
Btrfs: self-tests: Use macros instead of constants and add missing newline
Btrfs: self-tests: Support testing all possible sectorsizes and nodesizes
Btrfs: self-tests: Execute page straddling test only when nodesize < PAGE_SIZE
btrfs: advertise which crc32c implementation is being used at module load
Btrfs: add validadtion checks for chunk loading
Btrfs: add more validation checks for superblock
Btrfs: clear uptodate flags of pages in sys_array eb
Btrfs: self-tests: Support non-4k page size
Btrfs: Fix integer overflow when calculating bytes_per_bitmap
Btrfs: test_check_exists: Fix infinite loop when searching for free space entries
Btrfs: end transaction if we abort when creating uuid root
btrfs: Use __u64 in exported linux/btrfs.h. -
…/kernel/git/powerpc/linux
Pull powerpc fixes from
- ptrace: Fix out of bounds array access warning from Khem Raj
- pseries: Fix PCI config address for DDW from Gavin Shan
- pseries: Fix IBM_ARCH_VEC_NRCORES_OFFSET since POWER8NVL was added
from Michael Ellerman
- of: fix autoloading due to broken modalias with no 'compatible' from
Wolfram Sang
- radix: Fix always false comparison against MMU_NO_CONTEXT from Aneesh
Kumar K.V
- hash: Compute the segment size correctly for ISA 3.0 from Aneesh
Kumar K.V
- nohash: Fix build break with 64K pages from Michael Ellerman* tag 'powerpc-4.7-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/nohash: Fix build break with 64K pages
powerpc/mm/hash: Compute the segment size correctly for ISA 3.0
powerpc/mm/radix: Fix always false comparison against MMU_NO_CONTEXT
of: fix autoloading due to broken modalias with no 'compatible'
powerpc/pseries: Fix IBM_ARCH_VEC_NRCORES_OFFSET since POWER8NVL was added
powerpc/pseries: Fix PCI config address for DDW
powerpc/ptrace: Fix out of bounds array access warning -
…l/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
- fix regression in fam15h_power driver
- minor variable type fix in lm90 driver
- document compatible statement for ina2xx driver
* tag 'hwmon-for-linus-v4.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (lm90) use proper type for update_interval
hwmon: (ina2xx) Document compatible for INA231
hwmon: (fam15h_power) Disable preemption when reading registers -
Merge filesystem stacking fixes from Jann Horn.
* emailed patches from Jann Horn :
sched: panic on corrupted stack end
ecryptfs: forbid opening files without mmap handler
proc: prevent stacking filesystems on top -
Until now, hitting this BUG_ON caused a recursive oops (because oops
handling involves do_exit(), which calls into the scheduler, which in
turn raises an oops), which caused stuff below the stack to be
overwritten until a panic happened (e.g. via an oops in interrupt
context, caused by the overwritten CPU index in the thread_info).Just panic directly.
Signed-off-by: Jann Horn
Signed-off-by: Linus Torvalds -
This prevents users from triggering a stack overflow through a recursive
invocation of pagefault handling that involves mapping procfs files into
virtual memory.Signed-off-by: Jann Horn
Acked-by: Tyler Hicks
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds -
This prevents stacking filesystems (ecryptfs and overlayfs) from using
procfs as lower filesystem. There is too much magic going on inside
procfs, and there is no good reason to stack stuff on top of procfs.(For example, procfs does access checks in VFS open handlers, and
ecryptfs by design calls open handlers from a kernel thread that doesn't
drop privileges or so.)Signed-off-by: Jann Horn
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds -
Pull arm64 fix from Will Deacon:
"A fix for an issue that Alex saw whilst swapping with hardware
access/dirty bit support enabled in the kernel: Fix a failure to fault
in old pages on a write when CONFIG_ARM64_HW_AFDBM is enabled"* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: mm: always take dirty state from new pte in ptep_set_access_flags -
Pull x86 fixes from Ingo Molnar:
"Misc fixes from all around the map, plus a commit that introduces a
new header of Intel model name symbols (unused) that will make the
next merge window easier"* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/ioapic: Fix incorrect pointers in ioapic_setup_resources()
x86/entry/traps: Don't force in_interrupt() to return true in IST handlers
x86/cpu/AMD: Extend X86_FEATURE_TOPOEXT workaround to newer models
x86/cpu/intel: Introduce macros for Intel family numbers
x86, build: copy ldlinux.c32 to image.iso
x86/msr: Use the proper trace point conditional for writes -
Pull scheduler fixes from Ingo Molnar:
"Two scheduler debugging fixes"* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/debug: Fix 'schedstats=enable' cmdline option
sched/debug: Fix /proc/sched_debug regression -
Pull perf fixes from Ingo Molnar:
"A handful of tooling fixes, two PMU driver fixes and a cleanup of
redundant code that addresses a security analyzer false positive"* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/core: Remove a redundant check
perf/x86/intel/uncore: Remove SBOX support for Broadwell server
perf ctf: Convert invalid chars in a string before set value
perf record: Fix crash when kptr is restricted
perf symbols: Check kptr_restrict for root
perf/x86/intel/rapl: Fix pmus free during cleanup -
Pull locking fixes from Ingo Molnar:
"Misc fixes:- a file-based futex fix
- one more spin_unlock_wait() fix
- a ww-mutex deadlock detection improvement/fix
- and a raw_read_seqcount_latch() barrier fix"* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
futex: Calculate the futex key based on a tail page for file-based futexes
locking/qspinlock: Fix spin_unlock_wait() some more
locking/ww_mutex: Report recursive ww_mutex locking early
locking/seqcount: Re-fix raw_read_seqcount_latch() -
Pull EFI fixes from Ingo Molnar:
"Two fixes: a regression/crash fix, and a message output fix"* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi/arm: Fix the format of EFI debug messages
efi: Fix for_each_efi_memory_desc_in_map() for empty memmaps -
Pull objtool fix from Ingo Molnar:
"Addresses a false positive warning in the GPU/DRM code"[ Technically it's not a "false positive", but it's the virtual GPU
interface that needs the frame pointer for its own internal purposes ]* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool, drm/vmwgfx: Fix "duplicate frame pointer save" warning
10 Jun, 2016
7 commits
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Pull networking fixes from David Miller:
1) nfnetlink timestamp taken from wrong skb, fix from Florian Westphal.
2) Revert some msleep conversions in rtlwifi as these spots are in
atomic context, from Larry Finger.3) Validate that NFTA_SET_TABLE attribute is actually specified when we
call nf_tables_getset(). From Phil Turnbull.4) Don't do mdio_reset in stmmac driver with spinlock held as that can
sleep, from Vincent Palatin.5) sk_filter() does things other than run a BPF filter, so we should
not elide it's call just because sk->sk_filter is NULL. Fix from
Eric Dumazet.6) Fix missing backlog updates in several packet schedulers, from Cong
Wang.7) bnx2x driver should allow VLAN add/remove while the interface is
down, from Michal Schmidt.8) Several RDS/TCP race fixes from Sowmini Varadhan.
9) fq_codel scheduler doesn't return correct queue length in dumps,
from Eric Dumazet.10) Fix TCP stats for tail loss probe and early retransmit in ipv6, from
Yuchung Cheng.11) Properly initialize udp_tunnel_socket_cfg in l2tp_tunnel_create(),
from Guillaume Nault.12) qfq scheduler leaks SKBs if a kzalloc fails, fix from Florian
Westphal.13) sock_fprog passed into PACKET_FANOUT_DATA needs compat handling,
from Willem de Bruijn.* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (85 commits)
vmxnet3: segCnt can be 1 for LRO packets
packet: compat support for sock_fprog
stmmac: fix parameter to dwmac4_set_umac_addr()
net/mlx5e: Fix blue flame quota logic
net/mlx5e: Use ndo_stop explicitly at shutdown flow
net/mlx5: E-Switch, always set mc_promisc for allmulti vports
net/mlx5: E-Switch, Modify node guid on vf set MAC
net/mlx5: E-Switch, Fix vport enable flow
net/mlx5: E-Switch, Use the correct error check on returned pointers
net/mlx5: E-Switch, Use the correct free() function
net/mlx5: Fix E-Switch flow steering capabilities check
net/mlx5: Fix flow steering NIC capabilities check
net/mlx5: Fix root flow table update
net/mlx5: Fix MLX5_CMD_OP_MAX to be defined correctly
net/mlx5: Fix masking of reserved bits in XRCD number
net/mlx5: Fix the size of modify QP mailbox
mlxsw: spectrum: Don't sleep during ndo_get_phys_port_name()
mlxsw: spectrum: Make split flow match firmware requirements
wext: Fix 32 bit iwpriv compatibility issue with 64 bit Kernel
cfg80211: remove get/set antenna and tx power warnings
... -
Pull sound fixes from Takashi Iwai:
"We have only few, mainly HD-audio device-specific fixes. Realtek
codec driver got a slightly more LOC, but they are all for the new
codec chip, and won't affect others at all"* tag 'sound-4.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Add PCI ID for Kabylake
ALSA: hda/realtek: Add T560 docking unit fixup
ALSA: hda - Fix headset mic detection problem for Dell machine
ALSA: uapi: Add three missing header files to Kbuild file
ALSA: hda/realtek - Add support for new codecs ALC700/ALC701/ALC703
ALSA: hda/realtek - ALC256 speaker noise issue -
Pull drm fixes from Dave Airlie:
"This weeks instalment of fixes:amdgpu:
Lots of memory leak and firmware leak fixesnouveau:
Collection of display fixes, KASAN fixesvc4:
vblank/pageflipping fixesfsl-dcu:
Regmap cache fixomap:
Unused variable warning fix.Nothing too surprising so far"
* tag 'drm-fixes-for-v4.7-rc3' of git://people.freedesktop.org/~airlied/linux: (46 commits)
drm/amdgpu: fix warning with powerplay disabled.
drm/amd/powerplay: delete useless code as pptable changed in vbios.
drm/amd/powerplay: fix bug visit array out of bounds
drm/amdgpu: fix smu ucode memleak (v2)
drm/amdgpu: add release firmware for cgs
drm/amdgpu: fix tonga smu_fini mem leak
drm/amdgpu: fix fiji smu fini mem leak
drm/amdgpu: fix cik sdma ucode memleak
drm/amdgpu: fix sdma24 ucode mem leak
drm/amdgpu: fix sdma3 ucode mem leak
drm/amdgpu: fix uvd fini mem leak
drm/amdgpu: fix gfx 7 ucode mem leak
drm/amdgpu: fix gfx8 ucode mem leak
drm/amdgpu: fix missing free wb for cond_exec
drm/amdgpu: fix memleak in pptable_init
drm/amdgpu: fix mem leak in atombios
drm/amdgpu: fix mem leak in pplib/hwmgr
drm/amdgpu: fix mem leak in smumgr
drm/amdgpu: add pipeline sync while vmid switch in same ctx
drm/amdgpu: vBIOS post only call when mem_size zero
... -
Pull ACPI fix from Rafael Wysocki:
"A recently introduced boot regression related to the ACPI EC
initialization is addressed by restoring the previous behavior (Lv
Zheng)"* tag 'acpi-4.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / EC: Fix a boot EC regresion by restoring boot EC support for the DSDT EC -
Pull power management fixes from Rafael Wysocki:
"Stable-candidate fixes for the intel_pstate driver and the cpuidle
core.Specifics:
- Fix two intel_pstate initialization issues, one of which was
introduced during the 4.4 cycle (Srinivas Pandruvada)- Fix kernel build with CONFIG_UBSAN set and CONFIG_CPU_IDLE unset
(Catalin Marinas)"* tag 'pm-4.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: intel_pstate: Fix ->set_policy() interface for no_turbo
cpufreq: intel_pstate: Fix code ordering in intel_pstate_set_policy()
cpuidle: Do not access cpuidle_devices when !CONFIG_CPU_IDLE -
Merge misc fixes from Andrew Morton:
"7 fixes"* emailed patches from Andrew Morton :
mm/fadvise.c: do not discard partial pages with POSIX_FADV_DONTNEED
mm: introduce dedicated WQ_MEM_RECLAIM workqueue to do lru_add_drain_all
kernel/relay.c: fix potential memory leak
mm: thp: broken page count after commit aa88b68c3b1d
revert "mm: memcontrol: fix possible css ref leak on oom"
kasan: change memory hot-add error messages to info messages
mm/hugetlb: fix huge page reserve accounting for private mappings -
On a 4-socket Brickland system, hot-removing one ioapic is fine.
Hot-removing the 2nd one causes panic in mp_unregister_ioapic()
while calling release_resource().It is because the iomem_res pointer has already been released
when removing the first ioapic.To explain the use of &res[num] here: res is assigned to ioapic_resources,
and later in ioapic_insert_resources() we do:struct resource *r = ioapic_resources;
for_each_ioapic(i) {
insert_resource(&iomem_resource, r);
r++;
}Here 'r' is treated as an arry of 'struct resource', and the r++ ensures
that each element of the array is inserted separately. Thus we should call
release_resouce() on each element at &res[num].Fix it by assigning the correct pointers to ioapics[i].iomem_res in
ioapic_setup_resources().Signed-off-by: Rui Wang
Signed-off-by: Thomas Gleixner
Cc: tony.luck@intel.com
Cc: linux-pci@vger.kernel.org
Cc: rjw@rjwysocki.net
Cc: linux-acpi@vger.kernel.org
Cc: bhelgaas@google.com
Link: http://lkml.kernel.org/r/1465369193-4816-3-git-send-email-rui.y.wang@intel.com
Signed-off-by: Ingo Molnar
