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Subject[tip:timers/core] mn10300: Switch do_timer() to xtimer_update()
Commit-ID:  22b7fcdae562b6792b3f5517e89fd7e0337180ae
Gitweb: http://git.kernel.org/tip/22b7fcdae562b6792b3f5517e89fd7e0337180ae
Author: Torben Hohn <torbenh@gmx.de>
AuthorDate: Thu, 27 Jan 2011 16:00:12 +0100
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Wed, 9 Feb 2011 16:17:24 +0100

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: Torben 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: Thomas Gleixner <tglx@linutronix.de>
---
arch/mn10300/kernel/time.c | 6 +-----
1 files changed, 1 insertions(+), 5 deletions(-)
diff --git a/arch/mn10300/kernel/time.c b/arch/mn10300/kernel/time.c
index 75da468..5b95500 100644
--- a/arch/mn10300/kernel/time.c
+++ b/arch/mn10300/kernel/time.c
@@ -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);

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