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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: Alex Shi <alex.shi@linux.alibaba.com>
Acked-by: Roman 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alex Shi 2020-12-14 19:06:42 -08:00 committed by Linus Torvalds
parent 013339df11
commit a5eb011afe
1 changed files with 2 additions and 2 deletions
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4
mm/memcontrol.c
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@ -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