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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2010-03-15 00:34:57 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-17 18:43:47 -0700
commite9e58a4ec3b1086d1ed8c915311aef1ae55454fd (patch)
treea500ec01cce13fa17f2400ac57f4ad36f4d37bca /fs
parenta3d3203e4bb40f253b1541e310dc0f9305be7c84 (diff)
memcg: avoid use cmpxchg in swap cgroup maintainance
swap_cgroup uses 2bytes data and uses cmpxchg in a new operation. 2byte cmpxchg/xchg is not available on some archs. This patch replaces cmpxchg/xchg with operations under lock. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reported-by: Sachin Sant <sachinp@in.ibm.com> wrote: Acked-by: Balbir Singh <balbir@in.ibm.com> Acked-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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