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Hidetoshi Seto e5299926d7 x86: MCE: make cmci_discover_lock irq-safe ... Lockdep reports the warning below when Li tries to offline one cpu: [ 110.835487] ================================= [ 110.835616] [ INFO: inconsistent lock state ] [ 110.835688] 2.6.30-rc4-00336-g8c9ed89 #52 [ 110.835757] --------------------------------- [ 110.835828] inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. [ 110.835908] swapper/0 [HC1[1]:SC0[0]:HE0:SE1] takes: [ 110.835982] (cmci_discover_lock){?.+...}, at: [<ffffffff80236dc0>] cmci_clear+0x30/0x9b cmci_clear() can be called via smp_call_function_single(). It is better to disable interrupt while holding cmci_discover_lock, to turn it into an irq-safe lock - we can deadlock otherwise. [ Impact: fix possible deadlock in the MCE code ] Reported-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <4A03ED38.8000700@jp.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Reported-by: Shaohua Li<shaohua.li@intel.com>		16 years ago
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boot	…
configs	…
crypto	…
ia32	…
include/asm	Merge branch 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip	16 years ago
kernel	x86: MCE: make cmci_discover_lock irq-safe	16 years ago
kvm	…
lguest	…
lib	…
math-emu	…
mm	x86-64: finish cleanup_highmaps()'s job wrt. _brk_end	16 years ago
oprofile	…
pci	x86/PCI: don't bother with root quirks if _CRS is used	16 years ago
power	…
vdso	x86: gettimeofday() vDSO: fix segfault when tv == NULL	16 years ago
video	…
xen	x86: xen, i386: reserve Xen pagetables	16 years ago
Kconfig	Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	16 years ago
Kconfig.cpu	…
Kconfig.debug	…
Makefile	…
Makefile_32.cpu	…