memcg: remove impossible conditional when committing

No callsite ever passes a NULL pointer for a struct mem_cgroup * to the committing function. There is no need to check for it. Signed-off-by: Johannes Weiner <[email protected]> Acked-by: KAMEZAWA Hiroyuki <[email protected]> Cc: Daisuke Nishimura <[email protected]> Cc: Balbir Singh <[email protected]> Cc: Minchan Kim <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
mrcsosa · Mar 24, 2011 · c14f35c · c14f35c
1 parent 3403968
commit c14f35c
Showing 1 changed file with 0 additions and 4 deletions.
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
@@ -2118,10 +2118,6 @@ static void __mem_cgroup_commit_charge(struct mem_cgroup *mem,
 {
 	int nr_pages = page_size >> PAGE_SHIFT;
 
-	/* try_charge() can return NULL to *memcg, taking care of it. */
-	if (!mem)
-		return;
-
 	lock_page_cgroup(pc);
 	if (unlikely(PageCgroupUsed(pc))) {
 		unlock_page_cgroup(pc);