diff mbox series

[V3,2/3] sched:add task_running()

Message ID 1586867796-5768-3-git-send-email-wangqing@vivo.com (mailing list archive)
State New, archived
Headers show
Series Fixed dump_backtrace() when task running on another cpu | expand

Commit Message

王擎 April 14, 2020, 12:36 p.m. UTC 
The task_running() should be renamed to task_running_on_rq()
like the naming of task_running_on_cpu(), this is what it
originally mean.

Add task_running() no rq required.

Signed-off-by: Wang Qing <wangqing@vivo.com>
---
 include/linux/sched.h | 10 ++++++++++
 1 file changed, 10 insertions(+)
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Patch

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4418f5c..0a7b150 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1843,6 +1843,11 @@  static inline unsigned int task_cpu(const struct task_struct *p)
 
 extern void set_task_cpu(struct task_struct *p, unsigned int cpu);
 
+static inline int task_running(const struct task_struct *p)
+{
+	return READ_ONCE(p->on_cpu);
+}
+
 #else
 
 static inline unsigned int task_cpu(const struct task_struct *p)
@@ -1854,6 +1859,11 @@  static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
 {
 }
 
+static inline int task_running(const struct task_struct *p)
+{
+	return p == current;
+}
+
 #endif /* CONFIG_SMP */
 
 /*