oom: fix NULL pointer dereference

Commit b940fd7035 ("oom: remove unnecessary code and cleanup") added an
unnecessary NULL pointer dereference.  remove it.

Signed-off-by: KOSAKI Motohiro <[email protected]>
Reviewed-by: Minchan Kim <[email protected]>
Acked-by: David Rientjes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 5014e50644d1b7528a06fca742677cf1a77cc04f..17d48a67e7b7a448c1866c011a3194f60852da8f 100644 (file)
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -401,10 +401,9 @@ static void dump_header(struct task_struct *p, gfp_t gfp_mask, int order,
 static int oom_kill_task(struct task_struct *p, struct mem_cgroup *mem)
 {
        p = find_lock_task_mm(p);
-       if (!p) {
-               task_unlock(p);
+       if (!p)
                return 1;
-       }
+
        pr_err("Killed process %d (%s) total-vm:%lukB, anon-rss:%lukB, file-rss:%lukB\n",
                task_pid_nr(p), p->comm, K(p->mm->total_vm),
                K(get_mm_counter(p->mm, MM_ANONPAGES)),