[PATCH v5 07/24] sched/fair: Select preferred CPU at wakeup when possible

[Shrikanth Hegde <sshegde@linux.ibm.com>]

Update available_idle_cpu to consider preferred CPUs. This takes care of
lot of decisions at wakeup to use only preferred CPUs. There is no need to
put those explicit checks everywhere.

Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
---
 kernel/sched/sched.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 5d009c2529b2..148fe6145f1a 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1434,6 +1434,9 @@ static inline bool available_idle_cpu(int cpu)
 	if (!idle_rq(cpu_rq(cpu)))
 		return 0;
 
+	if (!cpu_preferred(cpu))
+		return 0;
+
 	if (vcpu_is_preempted(cpu))
 		return 0;
 
-- 
2.47.3