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120a52c388
linux/arch/powerpc/platforms/pseries
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Anton Blanchard 120a52c388 powerpc/nvram: Add spinlock to oops_to_nvram to prevent oops in compression code. 
When issuing a system reset we almost always oops in the oops_to_nvram
code because multiple CPUs are using the deflate work area. Add a
spinlock to protect it.

To play it safe I'm using trylock to avoid locking up if the NVRAM
code oopses. This means we might miss multiple CPUs oopsing at exactly
the same time but I think it's best to play it safe for now. Once we
are happy with the reliability we can change it to a full spinlock.

Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Jim Keniston <jkenisto@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-12-08 14:22:54 +11:00
..
cmm.c powerpc/pseries: Cleanup use of notifier_from_errno() 2011-03-02 16:50:06 +11:00
dlpar.c powerpc/pseries: Avoid spurious error during hotplug CPU add 2011-09-20 09:20:00 +10:00
dtl.c powerpc/pseries: Fix kexec on recent firmware versions 2011-08-05 14:47:57 +10:00
eeh_cache.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
eeh_driver.c powerpc/eeh: Display eeh error location for bus and device 2011-05-06 13:32:31 +10:00
eeh_event.c powerpc: Fix up implicit sched.h users 2011-10-31 19:30:40 -04:00
eeh_sysfs.c powerpc: Fix up implicit stat.h users 2011-10-31 19:30:39 -04:00
eeh.c Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
event_sources.c powerpc/pseries: Add WARN_ON() to request_event_sources_irqs() on irq allocation/request failure 2010-07-09 11:28:32 +10:00
firmware.c powerpc: Add VPHN firmware feature 2010-11-29 15:48:22 +11:00
hotplug-cpu.c powerpc: Fix up implicit sched.h users 2011-10-31 19:30:40 -04:00
hotplug-memory.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2011-07-25 22:59:39 -07:00
hvCall_inst.c powerpc: remove cast from void* 2010-11-03 10:23:26 -04:00
hvCall.S powerpc: Remove second definition of STACK_FRAME_OVERHEAD 2010-11-29 15:48:23 +11:00
hvconsole.c powerpc: convert hvconsole.c to export.h ; fix implicit use of errno.h 2011-10-31 19:30:43 -04:00
hvcserver.c
io_event_irq.c powerpc: various straight conversions from module.h --> export.h 2011-10-31 19:30:44 -04:00
iommu.c powerpc/powernv: Add TCE SW invalidation support 2011-11-25 14:32:57 +11:00
Kconfig powerpc/nvram: Add compression to fit more oops output into NVRAM 2011-09-20 09:19:46 +10:00
kexec.c powerpc/pseries: Simplify vpa deregistration functions 2011-08-05 14:47:58 +10:00
lpar.c powerpc: add export.h to files making use of EXPORT_SYMBOL 2011-10-31 19:30:37 -04:00
Makefile powerpc/pseries: Add support for IO event interrupts 2011-05-06 13:19:01 +10:00
mobility.c powerpc: Fix up implicit stat.h users 2011-10-31 19:30:39 -04:00
msi.c powerpc: Convert to new irq_* function names 2011-03-29 14:48:12 +02:00
nvram.c powerpc/nvram: Add spinlock to oops_to_nvram to prevent oops in compression code. 2011-12-08 14:22:54 +11:00
offline_states.h powerpc/smp: soft-replugged CPUs must go back to start_secondary 2011-04-01 15:37:09 +11:00
pci_dlpar.c powerpc: include export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:30:38 -04:00
pci.c [POWERPC] Rename get_property to of_get_property: arch/powerpc 2007-04-13 03:55:19 +10:00
phyp_dump.c lmb: rename to memblock 2010-07-14 17:14:00 +10:00
plpar_wrappers.h powerpc: fix two implicit header uses in pseries/plpar_wrappers.h 2011-10-31 19:30:42 -04:00
power.c [POWERPC] Fix warning in pseries/power.c 2008-02-20 13:33:37 +11:00
pseries_energy.c powerpc: Add support for new hcall H_BEST_ENERGY 2010-11-29 15:48:19 +11:00
pseries.h powerpc/pseries: Re-implement HVSI as part of hvc_vio 2011-06-29 17:48:35 +10:00
ras.c powerpc/pseries: Print corrupt r3 in FWNMI code 2011-05-19 14:30:43 +10:00
reconfig.c powerpc/pseries: Improve error code on reconfiguration notifier failure 2011-06-29 17:48:24 +10:00
scanlog.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
setup.c powerpc/mpic: Invert the meaning of MPIC_PRIMARY 2011-12-07 13:43:08 +11:00
smp.c powerpc: remove non-required uses of include <linux/module.h> 2011-10-31 19:30:44 -04:00
suspend.c powerpc: Fix up implicit stat.h users 2011-10-31 19:30:39 -04:00