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 <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: Christoph Lameter <[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 40ba05061a4fbc8a43d3eb046a58fe756748cd06..d3b9bac085b5226b650824395a851413321afa74 100644 (file)
--- 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