sched_rt: don't allocate cpumask in fastpath

Impact: cleanup

As pointed out by Steven Rostedt.  Since the arg in question is
unused, we simply change cpupri_find() to accept NULL.

Reported-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <200903251501.22664.rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 4 insertions, 11 deletions

diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index bac1061cea2f..fbec5a58ff10 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -805,20 +805,15 @@ static int select_task_rq_rt(struct task_struct *p, int sync)
 
 static void check_preempt_equal_prio(struct rq *rq, struct task_struct *p)
 {
-        cpumask_var_t mask;
-
         if (rq->curr->rt.nr_cpus_allowed == 1)
                 return;
 
-        if (!alloc_cpumask_var(&mask, GFP_ATOMIC))
-                return;
-
         if (p->rt.nr_cpus_allowed != 1
-            && cpupri_find(&rq->rd->cpupri, p, mask))
-                goto free;
+            && cpupri_find(&rq->rd->cpupri, p, NULL))
+                return;
 
-        if (!cpupri_find(&rq->rd->cpupri, rq->curr, mask))
-                goto free;
+        if (!cpupri_find(&rq->rd->cpupri, rq->curr, NULL))
+                return;
 
         /*
          * There appears to be other cpus that can accept
@@ -827,8 +822,6 @@ static void check_preempt_equal_prio(struct rq *rq, struct task_struct *p)
          */
         requeue_task_rt(rq, p, 1);
         resched_task(rq->curr);
-free:
-        free_cpumask_var(mask);
 }
 
 #endif /* CONFIG_SMP */