mem-hotplug: introduce {un}lock_memory_hotplug()

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Presently hwpoison is using lock_system_sleep() to prevent a race with
memory hotplug.  However lock_system_sleep() is a no-op if
CONFIG_HIBERNATION=n.  Therefore we need a new lock.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Suggested-by: Hugh Dickins <hughd@google.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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KOSAKI Motohiro 2010-12-02 14:31:19 -08:00 • committed by Linus Torvalds

parent 4fe65cab84

commit 20d6c96b5f

3 changed files with 34 additions and 11 deletions

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6

include/linux/memory_hotplug.h

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8

mm/memory-failure.c

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31

mm/memory_hotplug.c

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