sched/walt: Avoid walt irq work in offlined cpu

Avoid walt irq work in offlined cpu.

Change-Id: Ia4410562f66bfa57daa15d8c0a785a2c7a95f2a0
Signed-off-by: Maria Yu <aiquny@codeaurora.org>
(cherry picked from commit 702cec976c863388c784eff37a71fa3ee8bb84d7)

Author: sixtaku

kernel/sched/sched.h

@@ -2945,3 +2945,13 @@ find_first_cpu_bit(struct task_struct *p, const cpumask_t *search_cpus,
 #else
 #define find_first_cpu_bit(...) -1
 #endif
+
+#ifdef CONFIG_SMP
+static inline void sched_irq_work_queue(struct irq_work *work)
+{
+	if (likely(cpu_online(raw_smp_processor_id())))
+		irq_work_queue(work);
+	else
+		irq_work_queue_on(work, cpumask_any(cpu_online_mask));
+}
+#endif

kernel/sched/walt.c

@@ -878,7 +878,7 @@ void fixup_busy_time(struct task_struct *p, int new_cpu)
 	if (!same_freq_domain(new_cpu, task_cpu(p))) {
 		src_rq->notif_pending = true;
 		dest_rq->notif_pending = true;
-		irq_work_queue(&walt_migration_irq_work);
+		sched_irq_work_queue(&walt_migration_irq_work);
 	}
 
 	if (p == src_rq->ed_task) {
@@ -1941,7 +1941,7 @@ static inline void run_walt_irq_work(u64 old_window_start, struct rq *rq)
 	result = atomic64_cmpxchg(&walt_irq_work_lastq_ws, old_window_start,
 				   rq->window_start);
 	if (result == old_window_start)
-		irq_work_queue(&walt_cpufreq_irq_work);
+		sched_irq_work_queue(&walt_cpufreq_irq_work);
 }
 
 /* Reflect task activity on its demand and cpu's busy time statistics */