[PATCH] del_timer_sync(): add cpu_relax()

Relax the CPU in the del_timer_sync() busywait loop. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>

[PATCH] del_timer_sync(): add cpu_relax()
Relax the CPU in the del_timer_sync() busywait loop. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Andrew Morton · Linus Torvalds
1 parent 52e92e5788
Showing 1 changed file with 1 additions and 0 deletions Side-by-side Diff
kernel/timer.c
@@ -374,6 +374,7 @@
 		int ret = try_to_del_timer_sync(timer);
 		if (ret >= 0)
 			return ret;
+		cpu_relax();
 	}
 }
...	...	@@ -374,6 +374,7 @@
374	374	int ret = try_to_del_timer_sync(timer);
375	375	if (ret >= 0)
376	376	return ret;
	377	+ cpu_relax();
377	378	}
378	379	}
379	380