linux-kernel - [PATCH v2 16/20] mn10300: switch do_timer() to xtimer

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Message-ID: <20110127150011.23248.62040.stgit@localhost>
Date:	Thu, 27 Jan 2011 16:00:12 +0100
From:	Torben Hohn <torbenh@....de>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	hch@...radead.org, Peter Zijlstra <peterz@...radead.org>,
	johnstul@...ibm.com, David Howells <dhowells@...hat.com>,
	yong.zhang0@...il.com, Thomas Gleixner <tglx@...utronix.de>,
	Koichi Yasutake <yasutake.koichi@...panasonic.com>
Subject: [PATCH v2 16/20] mn10300: switch do_timer() to xtimer_update()

xtimer_update() properly takes the xtime_lock.
mn10300_last_tsc is only accessed from this function.

Cc: David Howells <dhowells@...hat.com>
Cc: Koichi Yasutake <yasutake.koichi@...panasonic.com>
Signed-off-by: Torben Hohn <torbenh@....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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