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authorGautham R Shenoy <ego@in.ibm.com>2007-10-18 23:40:47 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-19 11:53:44 -0700
commitd2b20b11547cefc89d6c81937e81afaf3c62808b (patch)
tree50a6c8e1d86c38fff417907d821eec0e0731e1a5 /ipc/msg.c
parent73e753a50dcac7d6d4fa8b9552203ef544a70d77 (diff)
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Add irq protection in the percpu-counters cpu-hotplug-callback path
Some of the per-cpu counters and thus their locks are accessed from IRQ contexts. This can cause a deadlock if it interrupts a cpu-offline thread which is transferring a dead-cpu's counts to the global counter. Add appropriate IRQ protection in the cpu-hotplug callback path. Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc/msg.c')
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