mm, oom: remove unnecessary variable

The "killed" variable in out_of_memory() can be removed since the call to
oom_kill_process() where we should block to allow the process time to
exit is obvious.

Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 91dd59f..1ecc0bc 100644 (file)
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -645,7 +645,6 @@ bool out_of_memory(struct oom_control *oc)
        unsigned long freed = 0;
        unsigned int uninitialized_var(points);
        enum oom_constraint constraint = CONSTRAINT_NONE;
-       int killed = 0;
 
        if (oom_killer_disabled)
                return false;
@@ -653,7 +652,7 @@ bool out_of_memory(struct oom_control *oc)
        blocking_notifier_call_chain(&oom_notify_list, 0, &freed);
        if (freed > 0)
                /* Got some memory back in the last second. */
-               goto out;
+               return true;
 
        /*
         * If current has a pending SIGKILL or is exiting, then automatically
@@ -666,7 +665,7 @@ bool out_of_memory(struct oom_control *oc)
        if (current->mm &&
            (fatal_signal_pending(current) || task_will_free_mem(current))) {
                mark_oom_victim(current);
-               goto out;
+               return true;
        }
 
        /*
@@ -684,7 +683,7 @@ bool out_of_memory(struct oom_control *oc)
                get_task_struct(current);
                oom_kill_process(oc, current, 0, totalpages, NULL,
                                 "Out of memory (oom_kill_allocating_task)");
-               goto out;
+               return true;
        }
 
        p = select_bad_process(oc, &points, totalpages);
@@ -696,16 +695,12 @@ bool out_of_memory(struct oom_control *oc)
        if (p && p != (void *)-1UL) {
                oom_kill_process(oc, p, points, totalpages, NULL,
                                 "Out of memory");
-               killed = 1;
-       }
-out:
-       /*
-        * Give the killed threads a good chance of exiting before trying to
-        * allocate memory again.
-        */
-       if (killed)
+               /*
+                * Give the killed process a good chance to exit before trying
+                * to allocate memory again.
+                */
                schedule_timeout_killable(1);
-
+       }
        return true;
 }