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Commit 73045c47 authored by Daisuke Nishimura's avatar Daisuke Nishimura Committed by Linus Torvalds
Browse files

memcg: remove mem from arg of charge_common 



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

Signed-off-by: default avatarDaisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: default avatarKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent bd0d24bf

mm/memcontrol.c

+8 −9
Original line number Diff line number Diff line
@@ -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;

}