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author | Michal Hocko <mhocko@suse.cz> | 2012-12-12 13:52:23 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-12 17:38:35 -0800 |
commit | c95d26c2ffd3931123d6a7a2489530ccbd36da7a (patch) | |
tree | ad54b115b525c7956f85c2b0105bff055036e0e8 /mm/mmap.c | |
parent | 220f2ac91353dd8b239b70c4b4cf1615b80c1ff5 (diff) | |
download | linux-3.10-c95d26c2ffd3931123d6a7a2489530ccbd36da7a.tar.gz linux-3.10-c95d26c2ffd3931123d6a7a2489530ccbd36da7a.tar.bz2 linux-3.10-c95d26c2ffd3931123d6a7a2489530ccbd36da7a.zip |
memcg: do not check for mm in __mem_cgroup_count_vm_event
The mm given to __mem_cgroup_count_vm_event() cannot be NULL because the
function is either called from the page fault path or vma->vm_mm is used.
So the check can be dropped.
The check was introduced by commit 456f998ec817 ("memcg: add the
pagefault count into memcg stats") because the originally proposed patch
used current->mm for shmem but this has been changed to vma->vm_mm later
on without the check being removed (thanks to Hugh for this
recollection).
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ying Han <yinghan@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: 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>
Diffstat (limited to 'mm/mmap.c')
0 files changed, 0 insertions, 0 deletions