Fix to avoid -1 retval.
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
---
kernel/sched/fair.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 94340c7..25e9e5b 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -2769,6 +2769,7 @@ select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flags)
goto unlock;
}
+ prev_cpu = new_cpu;
while (sd) {
int load_idx = sd->forkexec_idx;
struct sched_group *group;
@@ -2792,6 +2793,7 @@ select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flags)
if (new_cpu == -1 || new_cpu == cpu) {
/* Now try balancing at a lower domain level of cpu */
sd = sd->child;
+ new_cpu = prev_cpu;
continue;
}
@@ -2810,6 +2812,7 @@ select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flags)
unlock:
rcu_read_unlock();
+ BUG_ON(new_cpu < 0);
return new_cpu;
}
#endif /* CONFIG_SMP */
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