memcg: fix off-by-one when calculating swap cgroup map length
authorNamhyung Kim <namhyung@gmail.com>
Thu, 26 May 2011 23:25:30 +0000 (16:25 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 27 May 2011 00:12:35 +0000 (17:12 -0700)
commit33278f7f0a9e5a9b29f59e07b7e3182d27769ac2
tree8de853c293856cc227d703ffaa0e12410efa1fcd
parent268433b8e54486b12478e94ba18587bcc7de4d57
memcg: fix off-by-one when calculating swap cgroup map length

It allocated one more page than necessary if @max_pages was a multiple of
SC_PER_PAGE.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/page_cgroup.c