[2/3] sched: export idle_cpu()
diff mbox series

Message ID 1566281669-48212-3-git-send-email-longli@linuxonhyperv.com
State New
Headers show
  • fix interrupt swamp in NVMe
Related show

Commit Message

Long Li Aug. 20, 2019, 6:14 a.m. UTC
From: Long Li <longli@microsoft.com>

This function is useful for device drivers to check if this CPU has work to
do in process context.

Signed-off-by: Long Li <longli@microsoft.com>
 include/linux/sched.h | 1 +
 kernel/sched/core.c   | 1 +
 2 files changed, 2 insertions(+)

diff mbox series

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 575f1ef7b159..a209941c1770 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1501,6 +1501,7 @@  current_restore_flags(unsigned long orig_flags, unsigned long flags)
 extern int cpuset_cpumask_can_shrink(const struct cpumask *cur, const struct cpumask *trial);
 extern int task_can_attach(struct task_struct *p, const struct cpumask *cs_cpus_allowed);
 extern u64 get_cpu_rq_switches(int cpu);
+extern int idle_cpu(int cpu);
 #ifdef CONFIG_SMP
 extern void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask);
 extern int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask);
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 1a76f0e97c2d..d1cedfb38174 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4023,6 +4023,7 @@  int idle_cpu(int cpu)
 	return 1;
  * available_idle_cpu - is a given CPU idle for enqueuing work.