mm/memcontrol.c: remove redundant BUG_ON() in mem_cgroup_usage_unregister_event()

In the following code:

	if (type == _MEM)
		thresholds = &memcg->thresholds;
	else if (type == _MEMSWAP)
		thresholds = &memcg->memsw_thresholds;
	else
		BUG();

	BUG_ON(!thresholds);

The BUG_ON() seems redundant.

Signed-off-by: Anton Vorontsov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index c200875072f7ffe23f66fc3e61dd31d70ce2b516..4dc9709eff31ea145593c4839439c3a33be03625 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4467,12 +4467,6 @@ static void mem_cgroup_usage_unregister_event(struct cgroup *cgrp,
        else
                BUG();
 
-       /*
-        * Something went wrong if we trying to unregister a threshold
-        * if we don't have thresholds
-        */
-       BUG_ON(!thresholds);
-
        if (!thresholds->primary)
                goto unlock;