فهرست منبع

sh: do not latency trace idle.

Description snipped from Steven Rostedt's PPC patch:

    When idle is called, interrupts are blocked, but the idle
    function will still wake up on an interrupt. The problem is
    that the interrupt disabled latency tracer will take this call
    to idle as a latency.

    This patch disables the latency tracing when going into idle.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Paul Mundt 16 سال پیش
والد
کامیت
f74c034d52
1فایلهای تغییر یافته به همراه4 افزوده شده و 0 حذف شده
  1. 4 0
      arch/sh/kernel/process_32.c

+ 4 - 0
arch/sh/kernel/process_32.c

@@ -59,8 +59,12 @@ static void default_idle(void)
 		clear_thread_flag(TIF_POLLING_NRFLAG);
 		smp_mb__after_clear_bit();
 		set_bl_bit();
+		stop_critical_timings();
+
 		while (!need_resched())
 			cpu_sleep();
+
+		start_critical_timings();
 		clear_bl_bit();
 		set_thread_flag(TIF_POLLING_NRFLAG);
 	} else