container freezer: rename check_if_frozen()

check_if_frozen() sounds like it should return something when in fact it's
just updating the freezer state.
Signed-off-by: NMatt Helsley <matthltc@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

kernel/cgroup_freezer.c

@@ -201,8 +201,8 @@ static void freezer_fork(struct cgroup_subsys *ss, struct task_struct *task)
 /*
  * caller must hold freezer->lock
  */
-static void check_if_frozen(struct cgroup *cgroup,
-			     struct freezer *freezer)
+static void update_freezer_state(struct cgroup *cgroup,
+				 struct freezer *freezer)
 {
 	struct cgroup_iter it;
 	struct task_struct *task;
@@ -222,6 +222,10 @@ static void check_if_frozen(struct cgroup *cgroup,
 	 */
 	if (nfrozen == ntotal)
 		freezer->state = CGROUP_FROZEN;
+	else if (nfrozen > 0)
+		freezer->state = CGROUP_FREEZING;
+	else
+		freezer->state = CGROUP_THAWED;
 	cgroup_iter_end(cgroup, &it);
 }
 
@@ -240,7 +244,7 @@ static int freezer_read(struct cgroup *cgroup, struct cftype *cft,
 	if (state == CGROUP_FREEZING) {
 		/* We change from FREEZING to FROZEN lazily if the cgroup was
 		 * only partially frozen when we exitted write. */
-		check_if_frozen(cgroup, freezer);
+		update_freezer_state(cgroup, freezer);
 		state = freezer->state;
 	}
 	spin_unlock_irq(&freezer->lock);
@@ -301,7 +305,7 @@ static int freezer_change_state(struct cgroup *cgroup,
 
 	freezer = cgroup_freezer(cgroup);
 	spin_lock_irq(&freezer->lock);
-	check_if_frozen(cgroup, freezer); /* may update freezer->state */
+	update_freezer_state(cgroup, freezer);
 	if (goal_state == freezer->state)
 		goto out;
 	switch (freezer->state) {