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sh: Restore bl bit toggling in idle loop.

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This fixes up some crashes with IRQs racing the need_resched() test under
QEMU.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2009-12-18 14:19:27 +09:00
parent 2f7bb2dfed
commit 3147093e1d
1 changed files with 2 additions and 0 deletions
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arch/sh/kernel/idle.c
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@@ -92,6 +92,7 @@ void cpu_idle(void)
check_pgt_cache(); check_pgt_cache();
rmb(); rmb();
set_bl_bit();
local_irq_disable(); local_irq_disable();
/* Don't trace irqs off for idle */ /* Don't trace irqs off for idle */
stop_critical_timings(); stop_critical_timings();
@@ -102,6 +103,7 @@ void cpu_idle(void)
*/ */
WARN_ON(irqs_disabled()); WARN_ON(irqs_disabled());
start_critical_timings(); start_critical_timings();
clear_bl_bit();
} }
tick_nohz_restart_sched_tick(); tick_nohz_restart_sched_tick();