linux-kernel - [tip:timers/core] mn10300: Switch do_timer() to xtimer

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Message-ID: <tip-22b7fcdae562b6792b3f5517e89fd7e0337180ae@git.kernel.org>
Date:	Wed, 9 Feb 2011 15:18:53 GMT
From:	tip-bot for Torben Hohn <torbenh@....de>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	dhowells@...hat.com, torbenh@....de, tglx@...utronix.de,
	yasutake.koichi@...panasonic.com
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@....de>
AuthorDate: Thu, 27 Jan 2011 16:00:12 +0100
Committer:  Thomas Gleixner <tglx@...utronix.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@....de>
Cc: David Howells <dhowells@...hat.com>
Cc: Koichi Yasutake <yasutake.koichi@...panasonic.com>
LKML-Reference: <20110127150011.23248.62040.stgit@...alhost>
Signed-off-by: Thomas Gleixner <tglx@...utronix.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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