memcg: do not check for do_swap_account in mem_cgroup_{read,write,reset}

Since commit 2d11085 ("memcg: do not create memsw files if swap accounting is disabled") memsw files are created only if memcg swap accounting is enabled so it doesn't make any sense to check for it explicitly in mem_cgroup_read(), mem_cgroup_write() and mem_cgroup_reset(). Signed-off-by: Michal Hocko <[email protected]> Cc: Kamezawa Hiroyuki <[email protected]> Cc: Tejun Heo <[email protected]> Acked-by: Johannes Weiner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
ambv · Apr 29, 2013 · acb6d55 · acb6d55
1 parent ee5df05
commit acb6d55
Showing 1 changed file with 0 additions and 9 deletions.
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
@@ -5025,9 +5025,6 @@ static ssize_t mem_cgroup_read(struct cgroup *cont, struct cftype *cft,
 	type = MEMFILE_TYPE(cft->private);
 	name = MEMFILE_ATTR(cft->private);
 
-	if (!do_swap_account && type == _MEMSWAP)
-		return -EOPNOTSUPP;
-
 	switch (type) {
 	case _MEM:
 		if (name == RES_USAGE)
@@ -5162,9 +5159,6 @@ static int mem_cgroup_write(struct cgroup *cont, struct cftype *cft,
 	type = MEMFILE_TYPE(cft->private);
 	name = MEMFILE_ATTR(cft->private);
 
-	if (!do_swap_account && type == _MEMSWAP)
-		return -EOPNOTSUPP;
-
 	switch (name) {
 	case RES_LIMIT:
 		if (mem_cgroup_is_root(memcg)) { /* Can't set limit on root */
@@ -5241,9 +5235,6 @@ static int mem_cgroup_reset(struct cgroup *cont, unsigned int event)
 	type = MEMFILE_TYPE(event);
 	name = MEMFILE_ATTR(event);
 
-	if (!do_swap_account && type == _MEMSWAP)
-		return -EOPNOTSUPP;
-
 	switch (name) {
 	case RES_MAX_USAGE:
 		if (type == _MEM)