Commit a5eb011a authored by Alex Shi's avatar Alex Shi Committed by Linus Torvalds
Browse files

mm/memcg: update page struct member in comments 

The page->mem_cgroup member is replaced by memcg_data, and add a helper
page_memcg() for it.  Need to update comments to avoid confusing.

Link: https://lkml.kernel.org/r/1491c150-1cc0-6062-08ea-9c891548a3bc@linux.alibaba.com


Signed-off-by: default avatarAlex Shi <alex.shi@linux.alibaba.com>
Acked-by: default avatarRoman Gushchin <guro@fb.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 013339df

mm/memcontrol.c

+2 −2
Original line number Diff line number Diff line
@@ -1324,7 +1324,7 @@ int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, 
 * @page: the page

 * @pgdat: pgdat of the page

 *

 * This function relies on page->mem_cgroup being stable - see the

 * This function relies on page's memcg being stable - see the

 * access rules in commit_charge().

 */

struct lruvec *mem_cgroup_page_lruvec(struct page *page, struct pglist_data *pgdat)
@@ -2879,7 +2879,7 @@ static void commit_charge(struct page *page, struct mem_cgroup *memcg) 
{

	VM_BUG_ON_PAGE(page->mem_cgroup, page);

	/*

	 * Any of the following ensures page->mem_cgroup stability:

	 * Any of the following ensures page's memcg stability:

	 *

	 * - the page lock

	 * - LRU isolation