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memcg: add mem_cgroup_disabled()

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We check mem_cgroup is disabled or not by checking
mem_cgroup_subsys.disabled.  I think it has more references than expected,
now.

replacing
   if (mem_cgroup_subsys.disabled)
with
   if (mem_cgroup_disabled())

give us good look, I think.

[kamezawa.hiroyu@jp.fujitsu.com: fix typo]
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hirokazu Takahashi
2009-01-07 18:08:02 -08:00
committed by Linus Torvalds
parent 08e552c69c
commit f8d6654226
3 changed files with 30 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
include/linux/memcontrol.h
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@ -19,7 +19,7 @@
#ifndef _LINUX_MEMCONTROL_H
#define _LINUX_MEMCONTROL_H
#include <linux/cgroup.h>
struct mem_cgroup;
struct page_cgroup;
struct page;
@ -87,6 +87,14 @@ extern long mem_cgroup_calc_reclaim(struct mem_cgroup *mem, struct zone *zone,
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
extern int do_swap_account;
#endif
static inline bool mem_cgroup_disabled(void)
{
if (mem_cgroup_subsys.disabled)
return true;
return false;
}
#else /* CONFIG_CGROUP_MEM_RES_CTLR */
struct mem_cgroup;
@ -214,6 +222,11 @@ static inline long mem_cgroup_calc_reclaim(struct mem_cgroup *mem,
{
return 0;
}
static inline bool mem_cgroup_disabled(void)
{
return true;
}
#endif /* CONFIG_CGROUP_MEM_CONT */
#endif /* _LINUX_MEMCONTROL_H */