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sh: Restore bl bit toggling in idle loop.
author
Paul Mundt
<lethal@linux-sh.org>
Fri, 18 Dec 2009 05:19:27 +0000
(14:19 +0900)
committer
Paul Mundt
<lethal@linux-sh.org>
Mon, 21 Dec 2009 02:57:29 +0000
(11:57 +0900)
This fixes up some crashes with IRQs racing the need_resched() test under
QEMU.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
arch/sh/kernel/idle.c
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diff --git
a/arch/sh/kernel/idle.c
b/arch/sh/kernel/idle.c
index aaff0037fcd7ad89269154f5ac70076bb8a97278..8e47565dcfd1b7f0b009a5a03204942611839d7c 100644
(file)
--- a/
arch/sh/kernel/idle.c
+++ b/
arch/sh/kernel/idle.c
@@
-92,6
+92,7
@@
void cpu_idle(void)
check_pgt_cache();
rmb();
+ set_bl_bit();
local_irq_disable();
/* Don't trace irqs off for idle */
stop_critical_timings();
@@
-102,6
+103,7
@@
void cpu_idle(void)
*/
WARN_ON(irqs_disabled());
start_critical_timings();
+ clear_bl_bit();
}
tick_nohz_restart_sched_tick();