oom_kill: don't call for int_sqrt(0)

There is no need to call for int_sqrt if argument is 0.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Christoph Lameter <cl@linux-foundation.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 7 deletions

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 40ba05061a4f..d3b9bac085b5 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -55,7 +55,7 @@ static DEFINE_SPINLOCK(zone_scan_lock);
 
 unsigned long badness(struct task_struct *p, unsigned long uptime)
 {
-        unsigned long points, cpu_time, run_time, s;
+        unsigned long points, cpu_time, run_time;
         struct mm_struct *mm;
         struct task_struct *child;
 
@@ -110,12 +110,10 @@ unsigned long badness(struct task_struct *p, unsigned long uptime)
         else
                 run_time = 0;
 
-        s = int_sqrt(cpu_time);
-        if (s)
-                points /= s;
-        s = int_sqrt(int_sqrt(run_time));
-        if (s)
-                points /= s;
+        if (cpu_time)
+                points /= int_sqrt(cpu_time);
+        if (run_time)
+                points /= int_sqrt(int_sqrt(run_time));
 
         /*
          * Niced processes are most likely less important, so double