11 Jun, 2015
5 commits
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On -rt, the VM_BUG_ON(!irqs_disabled()) triggers inside the memcg
swapout path because the spin_lock_irq(&mapping->tree_lock) in the
caller doesn't actually disable the hardware interrupts - which is fine,
because on -rt the tophalves run in process context and so we are still
safe from preemption while updating the statistics.Remove the VM_BUG_ON() but keep the comment of what we rely on.
Signed-off-by: Johannes Weiner
Reported-by: Clark Williams
Cc: Fernando Lopez-Lezcano
Cc: Steven Rostedt
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Commit d5e616fc1c1d ("checkpatch: add a few more --fix corrections")
broke the GLOBAL_INITIALISERS test with bad parentheses and optional
leading spaces.Fix it.
Signed-off-by: Joe Perches
Reported-by: Bandan Das
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Clear zram disk io accounting when resetting the zram device. Otherwise
the residual io accounting stat will affect the diskstat in the next
zram active cycle.Signed-off-by: Weijie Yang
Acked-by: Sergey Senozhatsky
Acked-by: Minchan Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
When trimming memcg consumption excess (see memory.high), we call
try_to_free_mem_cgroup_pages without checking if we are allowed to sleep
in the current context, which can result in a deadlock. Fix this.Fixes: 241994ed8649 ("mm: memcontrol: default hierarchy interface for memory")
Signed-off-by: Vladimir Davydov
Cc: Johannes Weiner
Acked-by: Michal Hocko
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Izumi found the following oops when hot re-adding a node:
BUG: unable to handle kernel paging request at ffffc90008963690
IP: __wake_up_bit+0x20/0x70
Oops: 0000 [#1] SMP
CPU: 68 PID: 1237 Comm: rs:main Q:Reg Not tainted 4.1.0-rc5 #80
Hardware name: FUJITSU PRIMEQUEST2800E/SB, BIOS PRIMEQUEST 2000 Series BIOS Version 1.87 04/28/2015
task: ffff880838df8000 ti: ffff880017b94000 task.ti: ffff880017b94000
RIP: 0010:[] [] __wake_up_bit+0x20/0x70
RSP: 0018:ffff880017b97be8 EFLAGS: 00010246
RAX: ffffc90008963690 RBX: 00000000003c0000 RCX: 000000000000a4c9
RDX: 0000000000000000 RSI: ffffea101bffd500 RDI: ffffc90008963648
RBP: ffff880017b97c08 R08: 0000000002000020 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8a0797c73800
R13: ffffea101bffd500 R14: 0000000000000001 R15: 00000000003c0000
FS: 00007fcc7ffff700(0000) GS:ffff880874800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90008963690 CR3: 0000000836761000 CR4: 00000000001407e0
Call Trace:
unlock_page+0x6d/0x70
generic_write_end+0x53/0xb0
xfs_vm_write_end+0x29/0x80 [xfs]
generic_perform_write+0x10a/0x1e0
xfs_file_buffered_aio_write+0x14d/0x3e0 [xfs]
xfs_file_write_iter+0x79/0x120 [xfs]
__vfs_write+0xd4/0x110
vfs_write+0xac/0x1c0
SyS_write+0x58/0xd0
system_call_fastpath+0x12/0x76
Code: 5d c3 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 48 83 ec 20 65 48 8b 04 25 28 00 00 00 48 89 45 f8 31 c0 48 8d 47 48 39 47 48 48 c7 45 e8 00 00 00 00 48 c7 45 f0 00 00 00 00 48
RIP [] __wake_up_bit+0x20/0x70
RSP
CR2: ffffc90008963690Reproduce method (re-add a node)::
Hot-add nodeA --> remove nodeA --> hot-add nodeA (panic)This seems an use-after-free problem, and the root cause is
zone->wait_table was not set to *NULL* after free it in
try_offline_node.When hot re-add a node, we will reuse the pgdat of it, so does the zone
struct, and when add pages to the target zone, it will init the zone
first (including the wait_table) if the zone is not initialized. The
judgement of zone initialized is based on zone->wait_table:static inline bool zone_is_initialized(struct zone *zone)
{
return !!zone->wait_table;
}so if we do not set the zone->wait_table to *NULL* after free it, the
memory hotplug routine will skip the init of new zone when hot re-add
the node, and the wait_table still points to the freed memory, then we
will access the invalid address when trying to wake up the waiting
people after the i/o operation with the page is done, such as mentioned
above.Signed-off-by: Gu Zheng
Reported-by: Taku Izumi
Reviewed by: Yasuaki Ishimatsu
Cc: KAMEZAWA Hiroyuki
Cc: Tang Chen
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Jun, 2015
9 commits
-
Pull networking fixes from David Miller:
1) Fix stack allocation in s390 BPF JIT, from Michael Holzheu.
2) Disable LRO on openvswitch paths, from Jiri Benc.
3) UDP early demux doesn't handle multicast group membership properly,
fix from Shawn Bohrer.4) Fix TX queue hang due to incorrect handling of mixed sized fragments
and linearlization in i40e driver, from Anjali Singhai Jain.5) Cannot use disable_irq() in timer handler of AMD xgbe driver, from
Thomas Lendacky.6) b2net driver improperly assumes pci_alloc_consistent() gives zero'd
out memory, use dma_zalloc_coherent(). From Sriharsha Basavapatna.7) Fix use-after-free in MPLS and ipv6, from Robert Shearman.
8) Missing neif_napi_del() calls in cleanup paths of b44 driver, from
Hauke Mehrtens.* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
net: replace last open coded skb_orphan_frags with function call
net: bcmgenet: power on MII block for all MII modes
ipv6: Fix protocol resubmission
ipv6: fix possible use after free of dev stats
b44: call netif_napi_del()
bridge: disable softirqs around br_fdb_update to avoid lockup
Revert "bridge: use _bh spinlock variant for br_fdb_update to avoid lockup"
mpls: fix possible use after free of device
be2net: Replace dma/pci_alloc_coherent() calls with dma_zalloc_coherent()
bridge: use _bh spinlock variant for br_fdb_update to avoid lockup
amd-xgbe: Use disable_irq_nosync from within timer function
rhashtable: add missing import
i40e: Make sure to be in VEB mode if SRIOV is enabled at probe
i40e: start up in VEPA mode by default
i40e/i40evf: Fix mixed size frags and linearization
ipv4/udp: Verify multicast group is ours in upd_v4_early_demux()
openvswitch: disable LRO
s390/bpf: fix bpf frame pointer setup
s390/bpf: fix stack allocation -
Pull last-minute virtio fix from Michael Tsirkin:
"This fixes a minor issue affecting multiqueue virtio net when user
keeps changing the number of active queues and CPUs are added and
removed by hotplug"* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio_pci: Clear stale cpumask when setting irq affinity -
Pull ARM SoC fixes from Kevin Hilman:
"About 10 days worth of small bug fixes, and the (hopefully) final
round fixes for from arm-soc land for the -rc cycle. Nothing special
to note, but here's a brief summary of fixes by SoC type:- OMAP:
small set of misc DT fixes; boot fix for THUMB2 kernel- mediatek:
PMIC fixes; DT fix for model name- exynos:
wakeup interupt fixes for 3250- mvebu:
revert mbus patch which broke DMA masters* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: dts: am335x-boneblack: disable RTC-only sleep to avoid hardware damage
ARM: dts: AM35xx: fix system control module clocks
arm64: dts: mt8173-evb: fix model name
ARM: exynos: Fix wake-up interrupts for Exynos3250
ARM: dts: Fix n900 dts file to work around 4.1 touchscreen regression on n900
ARM: dts: Fix dm816x to use right compatible flag for MUSB
ARM: OMAP3: Fix booting with thumb2 kernel
Revert "bus: mvebu-mbus: make sure SDRAM CS for DMA don't overlap the MBus bridge window"
bus: mvebu-mbus: do not set WIN_CTRL_SYNCBARRIER on non io-coherent platforms.
ARM: mvebu: armada-xp-linksys-mamba: Disable internal RTC
soc: mediatek: Add compile dependency to pmic-wrapper
soc: mediatek: PMIC wrap: Fix register state machine handling
soc: mediatek: PMIC wrap: Fix clock rate handling -
Commit 70008aa50e92 ("skbuff: convert to skb_orphan_frags") replaced
open coded tests of SKBTX_DEV_ZEROCOPY and skb_copy_ubufs with calls
to helper function skb_orphan_frags. Apply that to the last remaining
open coded site.Signed-off-by: Willem de Bruijn
Acked-by: Michael S. Tsirkin
Signed-off-by: David S. Miller -
The RGMII block is currently only powered on when using RGMII or
RGMII_NO_ID, which is not correct when using the GENET interface in MII
or Reverse MII modes. We always need to power on the RGMII interface for
this block to properly work, regardless of the MII mode in which we
operate.Fixes: aa09677cba423 ("net: bcmgenet: add MDIO routines")
Signed-off-by: Florian Fainelli
Signed-off-by: David S. Miller -
UDP encapsulation is broken on IPv6. This is because the logic to resubmit
the nexthdr is inverted, checking for a ret value > 0 instead of < 0. Also,
the resubmit label is in the wrong position since we already get the
nexthdr value when performing decapsulation. In addition the skb pull is no
longer necessary either.This changes the return value check to look for < 0, using it for the
nexthdr on the next iteration, and moves the resubmit label to the proper
location.With these changes the v6 code now matches what we do in the v4 ip input
code wrt resubmitting when decapsulating.Signed-off-by: Josh Hunt
Acked-by: "Tom Herbert"
Signed-off-by: David S. Miller -
The memory pointed to by idev->stats.icmpv6msgdev,
idev->stats.icmpv6dev and idev->stats.ipv6 can each be used in an RCU
read context without taking a reference on idev. For example, through
IP6_*_STATS_* calls in ip6_rcv. These memory blocks are freed without
waiting for an RCU grace period to elapse. This could lead to the
memory being written to after it has been freed.Fix this by using call_rcu to free the memory used for stats, as well
as idev after an RCU grace period has elapsed.Signed-off-by: Robert Shearman
Acked-by: Hannes Frederic Sowa
Signed-off-by: David S. Miller -
…/git/tmlind/linux-omap into fixes
Merge omap fixes for v4.1, urgent fix to avoid potential hardware damage From Tony Lindgren:
Omap fixes for the -rc cycle, including a fix for potential hardware
breakage on BeagleBones:- BeagleBones don't support RTC-only mode, it can cause hardware
damage if system-power-controller is specified without
ti,pmic-shutdown-controller- Fix a recent regression to am3517 SoCs caused by the recent clock
move that was not noticed until now despite automated boot
testing- Fix a regression for n900 touchscreen triggered by recent
recent input changes- Fix compatible property for dm816x USB to avoid errors with
USB Ethernet- Fix oops for omap3 when built with CONFIG_THUMB2_KERNEL
* tag 'omap-for-v4.1/fixes-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: dts: am335x-boneblack: disable RTC-only sleep to avoid hardware damage
ARM: dts: AM35xx: fix system control module clocks
ARM: dts: Fix n900 dts file to work around 4.1 touchscreen regression on n900
ARM: dts: Fix dm816x to use right compatible flag for MUSB
ARM: OMAP3: Fix booting with thumb2 kernel -
Pull Intel IOMMU fix from David Woodhouse:
"This fixes an oops when attempting to enable 1:1 passthrough mode for
devices on which VT-d translation was disabled anyway.It's actually a long-standing bug but recent changes (commit
18436afdc11a: "iommu/vt-d: Allow RMRR on graphics devices too") have
made it much easier to trigger with 'iommu=pt intel_iommu=igfx_off' on
the command line"* git://git.infradead.org/intel-iommu:
iommu/vt-d: Fix passthrough mode with translation-disabled devices
08 Jun, 2015
10 commits
-
Pull libata fixes from Tejun Heo:
"Two driver fixes. One is for an ahci_mvebu controller config bug and
the other fixes pata_octeon_cf build issue"* 'for-4.1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
pata_octeon_cf: fix broken build
ata: ahci_mvebu: Fix wrongly set base address for the MBus window setting -
MODULE_DEVICE_TABLE is referring to wrong driver's table and breaks the
build. Fix that.Cc: stable@vger.kernel.org
Signed-off-by: Aaro Koskinen
Signed-off-by: Tejun Heo -
When the driver gets unregistered a call to netif_napi_del() was
missing, this all was also missing in the error paths of
b44_init_one().Signed-off-by: Hauke Mehrtens
Signed-off-by: David S. Miller -
br_fdb_update() can be called in process context in the following way:
br_fdb_add() -> __br_fdb_add() -> br_fdb_update() (if NTF_USE flag is set)
so we need to disable softirqs because there are softirq users of the
hash_lock. One easy way to reproduce this is to modify the bridge utility
to set NTF_USE, enable stp and then set maxageing to a low value so
br_fdb_cleanup() is called frequently and then just add new entries in
a loop. This happens because br_fdb_cleanup() is called from timer/softirq
context. The spin locks in br_fdb_update were _bh before commit f8ae737deea1
("[BRIDGE]: forwarding remove unneeded preempt and bh diasables")
and at the time that commit was correct because br_fdb_update() couldn't be
called from process context, but that changed after commit:
292d1398983f ("bridge: add NTF_USE support")
Using local_bh_disable/enable around br_fdb_update() allows us to keep
using the spin_lock/unlock in br_fdb_update for the fast-path.Signed-off-by: Nikolay Aleksandrov
Fixes: 292d1398983f ("bridge: add NTF_USE support")
Signed-off-by: David S. Miller -
This reverts commit 1d7c49037b12016e7056b9f2c990380e2187e766.
Nikolay Aleksandrov has a better version of this fix.
Signed-off-by: David S. Miller
-
The mpls device is used in an RCU read context without a lock being
held. As the memory is freed without waiting for the RCU grace period
to elapse, the freed memory could still be in use.Address this by using kfree_rcu to free the memory for the mpls device
after the RCU grace period has elapsed.Fixes: 03c57747a702 ("mpls: Per-device MPLS state")
Signed-off-by: Robert Shearman
Acked-by: "Eric W. Biederman"
Signed-off-by: David S. Miller -
Pull MIPS updates from Ralf Baechle:
"Eight fixes across arch/mips. Nothing stands particuarly out nor is
complicated but fixes keep coming in at a higher than comfortable
rate"* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: KVM: Do not sign extend on unsigned MMIO load
MIPS: BPF: Fix stack pointer allocation
MIPS: Loongson-3: Fix a cpu-hotplug issue in loongson3_ipi_interrupt()
MIPS: Fix enabling of DEBUG_STACKOVERFLOW
MIPS: c-r4k: Fix typo in probe_scache()
MIPS: Avoid an FPE exception in FCSR mask probing
MIPS: ath79: Add a missing new line in log message
MIPS: ralink: Fix clearing the illegal access interrupt -
There are several places in the driver (all in control paths) where
coherent dma memory is being allocated using either dma_alloc_coherent()
or the deprecated pci_alloc_consistent(). All these calls should be
changed to use dma_zalloc_coherent() to avoid uninitialized fields in
data structures backed by this memory.Reported-by: Joerg Roedel
Tested-by: Joerg Roedel
Signed-off-by: Sriharsha Basavapatna
Signed-off-by: David S. Miller -
br_fdb_update() can be called in process context in the following way:
br_fdb_add() -> __br_fdb_add() -> br_fdb_update() (if NTF_USE flag is set)
so we need to use spin_lock_bh because there are softirq users of the
hash_lock. One easy way to reproduce this is to modify the bridge utility
to set NTF_USE, enable stp and then set maxageing to a low value so
br_fdb_cleanup() is called frequently and then just add new entries in
a loop. This happens because br_fdb_cleanup() is called from timer/softirq
context. These locks were _bh before commit f8ae737deea1
("[BRIDGE]: forwarding remove unneeded preempt and bh diasables")
and at the time that commit was correct because br_fdb_update() couldn't be
called from process context, but that changed after commit:
292d1398983f ("bridge: add NTF_USE support")Signed-off-by: Wilson Kok
Signed-off-by: Nikolay Aleksandrov
Fixes: 292d1398983f ("bridge: add NTF_USE support")
Signed-off-by: David S. Miller
07 Jun, 2015
11 commits
-
Since the Tx timer function runs in softirq context the driver needs
to call disable_irq_nosync instead of a disable_irq.Reported-by: Josh Stone
Signed-off-by: Tom Lendacky
Signed-off-by: David S. Miller -
rhashtable uses EXPORT_SYMBOL_GPL() without importing linux/export.h
directly it is only imported indirectly through some other includes.Signed-off-by: Hauke Mehrtens
Signed-off-by: David S. Miller -
Pull driver core fixes from Greg KH:
"Here are two fixes for the driver core that resolve some reported
issues.One is a regression from 4.0, the other a fixes a reported oops that
has been there since 3.19.Both have been in linux-next for a while with no problems"
* tag 'driver-core-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
drivers/base: cacheinfo: handle absence of caches
drivers: of/base: move of_init to driver_init -
Pull staging / IIO fixes from Greg KH:
"Here are some IIO driver fixes to resolve reported issues, some ozwpan
fixes for some reported CVE problems, and a rtl8712 driver fix for a
reported regression.All have been in linux-next successfully"
* tag 'staging-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: rtl8712: fix stack dump
ozwpan: unchecked signed subtraction leads to DoS
ozwpan: divide-by-zero leading to panic
ozwpan: Use unsigned ints to prevent heap overflow
ozwpan: Use proper check to prevent heap overflow
iio: adc: twl6030-gpadc: Fix modalias
iio: adis16400: Fix burst transfer for adis16448
iio: adis16400: Fix burst mode
iio: adis16400: Compute the scan mask from channel indices
iio: adis16400: Use != channel indices for the two voltage channels
iio: adis16400: Report pressure channel scale -
Pull tty/serial driver fixes from Greg KH:
"Here are a few TTY and Serial driver fixes for reported regressions
and crashes.All of these have been in linux-next with no reported problems"
* tag 'tty-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
n_tty: Fix auditing support for cannonical mode
serial: 8250_omap: provide complete custom startup & shutdown callbacks
n_tty: Fix calculation of size in canon_copy_from_read_buf
serial: imx: Fix DMA handling for IDLE condition aborts
serial/amba-pl011: Unconditionally poll for FIFO space before each TX char -
Pull USB and PHY driver fixes from Greg KH:
"Here are some USB and PHY driver fixes that resolve some reported
regressions. Also in here are some new device ids.All of the details are in the shortlog and these patches have been in
linux-next with no problems"* tag 'usb-4.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (22 commits)
USB: cp210x: add ID for HubZ dual ZigBee and Z-Wave dongle
usb: renesas_usbhs: Don't disable the pipe if Control write status stage
usb: renesas_usbhs: Fix fifo unclear in usbhsf_prepare_pop
usb: gadget: f_fs: fix check in read operation
usb: musb: fix order of conditions for assigning end point operations
usb: gadget: f_uac1: check return code from config_ep_by_speed
usb: gadget: ffs: fix: Always call ffs_closed() in ffs_data_clear()
usb: gadget: g_ffs: Fix counting of missing_functions
usb: s3c2410_udc: correct reversed pullup logic
usb: dwc3: gadget: Fix incorrect DEPCMD and DGCMD status macros
usb: phy: tahvo: Pass the IRQF_ONESHOT flag
usb: phy: ab8500-usb: Pass the IRQF_ONESHOT flag
usb: renesas_usbhs: Revise the binding document about the dma-names
usb: host: xhci: add mutex for non-thread-safe data
usb: make module xhci_hcd removable
USB: serial: ftdi_sio: Add support for a Motion Tracker Development Board
usb: gadget: f_midi: fix segfault when reading empty id
phy: phy-rcar-gen2: Fix USBHS_UGSTS_LOCK value
phy: omap-usb2: invoke pm_runtime_disable on error path
phy: fix Kconfig dependencies
... -
Pull devicetree fix from Grant Likely:
"Stupid typo fix for v4.1. One of the IS_ENABLED() macro calls forgot
the CONFIG_ prefix. Only affects a tiny number of platforms, but
still..."* tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux:
of/dynamic: Fix test for PPC_PSERIES -
Pull drm fixes from Dave Airlie:
"i915 has a bunch of fixes, and Russell found a bug in sysfs writing
handling that results in userspace getting stuck"* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm: fix writing to /sys/class/drm/*/status
drm/i915: Move WaBarrierPerformanceFixDisable:skl to skl code from chv code
drm/i915: Include G4X/VLV/CHV in self refresh status
drm/i915: Initialize HWS page address after GPU reset
drm/i915: Don't skip request retirement if the active list is empty
drm/i915/hsw: Fix workaround for server AUX channel clock divisor -
Pull input subsystem fixes from Dmitry Torokhov:
"Just a couple touchpad drivers fixups"* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: alps - do not reduce trackpoint speed by half
Input: elantech - add new icbody type
Input: elantech - fix detection of touchpads where the revision matches a known rate -
Pull swiotlb fix from Konrad Rzeszutek Wilk:
"Tiny little fix which just converts an function to be static. Really
tiny"* 'stable/for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
swiotlb: do not export map_single function -
Pull iBFT fix from Konrad Rzeszutek Wilk:
"One single fix from Chris to workaround UEFI platforms failing with
iSCSI IBFT"* 'stable/for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft:
iscsi_ibft: filter null v4-mapped v6 addresses
06 Jun, 2015
5 commits
-
Fix possible unintended sign extension in unsigned MMIO loads by casting
to uint16_t in the case of mmio_needed != 2.Signed-off-by: Nicholas Mc Guire
Reviewed-by: James Hogan
Tested-by: James Hogan
Cc: Gleb Natapov
Cc: Paolo Bonzini
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9985/
Signed-off-by: Ralf Baechle -
Fix stack pointer offset which could potentially corrupt
argument registers in the previous frame. The calculated offset
reflects the size of all the registers we need to preserve so there
is no need for this erroneous subtraction.[ralf@linux-mips.org: Fixed conflict due to only applying this fix part
of the entire series as part of 4.1 fixes.]Signed-off-by: Markos Chandras
Cc: netdev@vger.kernel.org
Cc: "David S. Miller"
Cc: Alexei Starovoitov
Cc: Daniel Borkmann
Cc: Hannes Frederic Sowa
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/10527/
Signed-off-by: Ralf Baechle -
setup_per_cpu_areas() only setup __per_cpu_offset[] for each possible
cpu, but loongson_sysconf.nr_cpus can be greater than possible cpus
(due to reserved_cpus_mask). So in loongson3_ipi_interrupt(), percpu
access will touch the original varible in .data..percpu section which
has been freed. Without this patch, cpu-hotplug will cause memery
corruption.Signed-off-by: Huacai Chen
Cc: John Crispin
Cc: Steven J. Hill
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang
Cc: Zhangjin Wu
Patchwork: http://patchwork.linux-mips.org/patch/10524/
Signed-off-by: Ralf Baechle -
Commit 334c86c494b9 ("MIPS: IRQ: Add stackoverflow detection") added
kernel stack overflow detection, however it only enabled it conditional
upon the preprocessor definition DEBUG_STACKOVERFLOW, which is never
actually defined. The Kconfig option is called DEBUG_STACKOVERFLOW,
which manifests to the preprocessor as CONFIG_DEBUG_STACKOVERFLOW, so
switch it to using that definition instead.Fixes: 334c86c494b9 ("MIPS: IRQ: Add stackoverflow detection")
Signed-off-by: James Hogan
Cc: Ralf Baechle
Cc: Adam Jiang
Cc: linux-mips@linux-mips.org
Cc: # 2.6.37+
Patchwork: http://patchwork.linux-mips.org/patch/10531/
Signed-off-by: Ralf Baechle -
Fixes a typo in arch/mips/mm/c-r4k.c's probe_scache().
Signed-off-by: Joshua Kinard
Signed-off-by: Ralf Baechle
