net: atmel_macb Kconfig: remove long dependency line

[pandora-kernel.git] / kernel / sched.c

diff --git a/kernel/sched.c b/kernel/sched.c
index 41541d7..dc85ceb 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1294,6 +1294,10 @@ static void resched_task(struct task_struct *p)
 static void sched_rt_avg_update(struct rq *rq, u64 rt_delta)
 {
 }
+
+static void sched_avg_update(struct rq *rq)
+{
+}
 #endif /* CONFIG_SMP */
 
 #if BITS_PER_LONG == 32
@@ -3182,6 +3186,8 @@ static void update_cpu_load(struct rq *this_rq)
 
                this_rq->cpu_load[i] = (old_load * (scale - 1) + new_load) >> i;
        }
+
+       sched_avg_update(this_rq);
 }
 
 static void update_cpu_load_active(struct rq *this_rq)
@@ -3507,9 +3513,9 @@ void task_times(struct task_struct *p, cputime_t *ut, cputime_t *st)
        rtime = nsecs_to_cputime(p->se.sum_exec_runtime);
 
        if (total) {
-               u64 temp;
+               u64 temp = rtime;
 
-               temp = (u64)(rtime * utime);
+               temp *= utime;
                do_div(temp, total);
                utime = (cputime_t)temp;
        } else
@@ -3540,9 +3546,9 @@ void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t *st)
        rtime = nsecs_to_cputime(cputime.sum_exec_runtime);
 
        if (total) {
-               u64 temp;
+               u64 temp = rtime;
 
-               temp = (u64)(rtime * cputime.utime);
+               temp *= cputime.utime;
                do_div(temp, total);
                utime = (cputime_t)temp;
        } else
@@ -3865,8 +3871,16 @@ int mutex_spin_on_owner(struct mutex *lock, struct thread_info *owner)
                /*
                 * Owner changed, break to re-assess state.
                 */
-               if (lock->owner != owner)
+               if (lock->owner != owner) {
+                       /*
+                        * If the lock has switched to a different owner,
+                        * we likely have heavy contention. Return 0 to quit
+                        * optimistic spinning and not contend further:
+                        */
+                       if (lock->owner)
+                               return 0;
                        break;
+               }
 
                /*
                 * Is that owner really running on that cpu?