[PATCH 1/4] MN10300: Call update_process_times() outside of thextime_lock

From: David Howells
Date: Tue Feb 19 2008 - 13:59:12 EST


Call update_process_times() outside of the xtime_lock. Somewhere somewhere
inside one of the functions called by that, xtime_lock is readlocked, which
ends up in a deadlock situation.

Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
---

arch/mn10300/kernel/time.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)


diff --git a/arch/mn10300/kernel/time.c b/arch/mn10300/kernel/time.c
index ff492e3..babb7c2 100644
--- a/arch/mn10300/kernel/time.c
+++ b/arch/mn10300/kernel/time.c
@@ -84,11 +84,13 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
/* advance the kernel's time tracking system */
profile_tick(CPU_PROFILING);
do_timer(1);
- update_process_times(user_mode(get_irq_regs()));
check_rtc_time();
}

write_sequnlock(&xtime_lock);
+
+ update_process_times(user_mode(get_irq_regs()));
+
return IRQ_HANDLED;
}


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