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Commit 1508487e authored by Ingo Molnar's avatar Ingo Molnar
Browse files

timers: fix itimer/many thread hang, fix 



fix bogus rq dereference: v3 removed the locking but also removed the rq
initialization.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 7086efe1

kernel/sched.c

+5 −1
Original line number Original line Diff line number Diff line
@@ -4042,10 +4042,12 @@ EXPORT_PER_CPU_SYMBOL(kstat); 
 */

 */

unsigned long long task_delta_exec(struct task_struct *p)

unsigned long long task_delta_exec(struct task_struct *p)

{

{

	struct rq *rq;

	unsigned long flags;

	unsigned long flags;

	struct rq *rq;

	u64 ns = 0;

	u64 ns = 0;





	rq = task_rq_lock(p, &flags);



	if (task_current(rq, p)) {

	if (task_current(rq, p)) {

		u64 delta_exec;

		u64 delta_exec;
@@ -4055,6 +4057,8 @@ unsigned long long task_delta_exec(struct task_struct *p) 
			ns = delta_exec;

			ns = delta_exec;

	}

	}





	task_rq_unlock(rq, &flags);



	return ns;

	return ns;

}

}