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memcg: remove mem from arg of charge_common

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mem_cgroup_charge_common() is always called with @mem = NULL, so it's
meaningless.  This patch removes it.

Signed-off-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: 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>
This commit is contained in:
Daisuke Nishimura 2010-08-10 18:02:59 -07:00 committed by Linus Torvalds
parent bd0d24bfe8
commit 73045c47b6
1 changed files with 8 additions and 9 deletions
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17
mm/memcontrol.c
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@ -2018,10 +2018,9 @@ static int mem_cgroup_move_parent(struct page_cgroup *pc,
* < 0 if the cgroup is over its limit
*/
static int mem_cgroup_charge_common(struct page *page, struct mm_struct *mm,
gfp_t gfp_mask, enum charge_type ctype,
struct mem_cgroup *memcg)
gfp_t gfp_mask, enum charge_type ctype)
{
struct mem_cgroup *mem;
struct mem_cgroup *mem = NULL;
struct page_cgroup *pc;
int ret;
@ -2031,7 +2030,6 @@ static int mem_cgroup_charge_common(struct page *page, struct mm_struct *mm,
return 0;
prefetchw(pc);
mem = memcg;
ret = __mem_cgroup_try_charge(mm, gfp_mask, &mem, true);
if (ret || !mem)
return ret;
@ -2059,7 +2057,7 @@ int mem_cgroup_newpage_charge(struct page *page,
if (unlikely(!mm))
mm = &init_mm;
return mem_cgroup_charge_common(page, mm, gfp_mask,
MEM_CGROUP_CHARGE_TYPE_MAPPED, NULL);
MEM_CGROUP_CHARGE_TYPE_MAPPED);
}
static void
@ -2069,7 +2067,6 @@ __mem_cgroup_commit_charge_swapin(struct page *page, struct mem_cgroup *ptr,
int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
gfp_t gfp_mask)
{
struct mem_cgroup *mem = NULL;
int ret;
if (mem_cgroup_disabled())
@ -2101,22 +2098,24 @@ int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
unlock_page_cgroup(pc);
}
if (unlikely(!mm && !mem))
if (unlikely(!mm))
mm = &init_mm;
if (page_is_file_cache(page))
return mem_cgroup_charge_common(page, mm, gfp_mask,
MEM_CGROUP_CHARGE_TYPE_CACHE, NULL);
MEM_CGROUP_CHARGE_TYPE_CACHE);
/* shmem */
if (PageSwapCache(page)) {
struct mem_cgroup *mem = NULL;
ret = mem_cgroup_try_charge_swapin(mm, page, gfp_mask, &mem);
if (!ret)
__mem_cgroup_commit_charge_swapin(page, mem,
MEM_CGROUP_CHARGE_TYPE_SHMEM);
} else
ret = mem_cgroup_charge_common(page, mm, gfp_mask,
MEM_CGROUP_CHARGE_TYPE_SHMEM, mem);
MEM_CGROUP_CHARGE_TYPE_SHMEM);
return ret;
}