diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memcontrol.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index b85a1c040bc9..2f7f934bf435 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3481,7 +3481,7 @@ static void __mem_cgroup_usage_unregister_event(struct mem_cgroup *memcg, struct mem_cgroup_thresholds *thresholds; struct mem_cgroup_threshold_ary *new; unsigned long usage; - int i, j, size; + int i, j, size, entries; mutex_lock(&memcg->thresholds_lock); @@ -3501,14 +3501,20 @@ static void __mem_cgroup_usage_unregister_event(struct mem_cgroup *memcg, __mem_cgroup_threshold(memcg, type == _MEMSWAP); /* Calculate new number of threshold */ - size = 0; + size = entries = 0; for (i = 0; i < thresholds->primary->size; i++) { if (thresholds->primary->entries[i].eventfd != eventfd) size++; + else + entries++; } new = thresholds->spare; + /* If no items related to eventfd have been cleared, nothing to do */ + if (!entries) + goto unlock; + /* Set thresholds array to NULL if we don't have thresholds */ if (!size) { kfree(new); |