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Commit 22b7fcda authored by Torben Hohn's avatar Torben Hohn Committed by Thomas Gleixner
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mn10300: Switch do_timer() to xtimer_update() 



Only one CPU gets the timer interrupt so mn10300_last_tsc does not
need to be protected by xtime lock. Remove xtime lovking and use
xtime_update() which does the locking itself.

Signed-off-by: default avatarTorben Hohn <torbenh@gmx.de>
Cc: David Howells <dhowells@redhat.com>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
LKML-Reference: <20110127150011.23248.62040.stgit@localhost>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 0606f422

arch/mn10300/kernel/time.c

+1 −5
Original line number Diff line number Diff line
@@ -104,8 +104,6 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id) 
	unsigned tsc, elapse;

	irqreturn_t ret;



	write_seqlock(&xtime_lock);



	while (tsc = get_cycles(),

	       elapse = tsc - mn10300_last_tsc, /* time elapsed since last

						 * tick */
@@ -114,11 +112,9 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id) 
		mn10300_last_tsc += MN10300_TSC_PER_HZ;



		/* advance the kernel's time tracking system */

		do_timer(1);

		xtime_update(1);

	}



	write_sequnlock(&xtime_lock);



	ret = local_timer_interrupt();

#ifdef CONFIG_SMP

	send_IPI_allbutself(LOCAL_TIMER_IPI);