linux-kernel - [tip:timers/core] alpha: Change do_timer() to xtime

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Message-ID: <tip-1340f3e0b29b745a33f431455c3a37f48197bc81@git.kernel.org>
Date:	Mon, 31 Jan 2011 14:05:55 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,
	peterz@...radead.org, torbenh@....de, mattst88@...il.com,
	ink@...assic.park.msu.ru, tglx@...utronix.de, rth@...ddle.net
Subject: [tip:timers/core] alpha: Change do_timer() to xtime_update()

Commit-ID:  1340f3e0b29b745a33f431455c3a37f48197bc81
Gitweb:     http://git.kernel.org/tip/1340f3e0b29b745a33f431455c3a37f48197bc81
Author:     Torben Hohn <torbenh@....de>
AuthorDate: Thu, 27 Jan 2011 15:59:15 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Mon, 31 Jan 2011 14:55:43 +0100

alpha: Change do_timer() to xtime_update()

xtime_update() takes the xtime_lock itself.

timer_interrupt() is only called on the boot cpu. See do_entInt(). So
"state" in timer_interrupt does not require protection by xtime_lock.

Signed-off-by: Torben Hohn <torbenh@....de>
Cc: Richard Henderson <rth@...ddle.net>
Cc: Ivan Kokshaysky <ink@...assic.park.msu.ru>
Cc: Matt Turner <mattst88@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: johnstul@...ibm.com
Cc: hch@...radead.org
Cc: yong.zhang0@...il.com
LKML-Reference: <20110127145915.23248.20919.stgit@...alhost>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 arch/alpha/kernel/time.c |    8 ++------
 1 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/arch/alpha/kernel/time.c b/arch/alpha/kernel/time.c
index c1f3e7c..a58e84f 100644
--- a/arch/alpha/kernel/time.c
+++ b/arch/alpha/kernel/time.c
@@ -159,7 +159,7 @@ void read_persistent_clock(struct timespec *ts)
 
 /*
  * timer_interrupt() needs to keep up the real-time clock,
- * as well as call the "do_timer()" routine every clocktick
+ * as well as call the "xtime_update()" routine every clocktick
  */
 irqreturn_t timer_interrupt(int irq, void *dev)
 {
@@ -172,8 +172,6 @@ irqreturn_t timer_interrupt(int irq, void *dev)
 	profile_tick(CPU_PROFILING);
 #endif
 
-	write_seqlock(&xtime_lock);
-
 	/*
 	 * Calculate how many ticks have passed since the last update,
 	 * including any previous partial leftover.  Save any resulting
@@ -187,9 +185,7 @@ irqreturn_t timer_interrupt(int irq, void *dev)
 	nticks = delta >> FIX_SHIFT;
 
 	if (nticks)
-		do_timer(nticks);
-
-	write_sequnlock(&xtime_lock);
+		xtime_update(nticks);
 
 	if (test_irq_work_pending()) {
 		clear_irq_work_pending();
--
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