linux-kernel - [tip:timers/core] frv: Switch do_timer() to xtime

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Message-ID: <tip-57464bd87f708e75b47312766e3fc8dc3aaf66ad@git.kernel.org>
Date:	Mon, 31 Jan 2011 14:08:15 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, peterz@...radead.org,
	tglx@...utronix.de
Subject: [tip:timers/core] frv: Switch do_timer() to xtime_update()

Commit-ID:  57464bd87f708e75b47312766e3fc8dc3aaf66ad
Gitweb:     http://git.kernel.org/tip/57464bd87f708e75b47312766e3fc8dc3aaf66ad
Author:     Torben Hohn <torbenh@....de>
AuthorDate: Thu, 27 Jan 2011 15:59:46 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Mon, 31 Jan 2011 14:55:45 +0100

frv: Switch do_timer() to xtime_update()

__set_LEDS() does not need to be protected by xtime_lock.
its used unprotected in other places.

[ tglx: Removed stale comment ]

Signed-off-by: Torben Hohn <torbenh@....de>
Cc: hch@...radead.org
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: johnstul@...ibm.com
Cc: David Howells <dhowells@...hat.com>
Cc: yong.zhang0@...il.com
LKML-Reference: <20110127145946.23248.57952.stgit@...alhost>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 arch/frv/kernel/time.c |   14 ++------------
 1 files changed, 2 insertions(+), 12 deletions(-)

diff --git a/arch/frv/kernel/time.c b/arch/frv/kernel/time.c
index 0ddbbae..b457de4 100644
--- a/arch/frv/kernel/time.c
+++ b/arch/frv/kernel/time.c
@@ -50,21 +50,13 @@ static struct irqaction timer_irq  = {
 
 /*
  * 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
  */
 static irqreturn_t timer_interrupt(int irq, void *dummy)
 {
 	profile_tick(CPU_PROFILING);
-	/*
-	 * Here we are in the timer irq handler. We just have irqs locally
-	 * disabled but we don't know if the timer_bh is running on the other
-	 * CPU. We need to avoid to SMP race with it. NOTE: we don't need
-	 * the irq version of write_lock because as just said we have irq
-	 * locally disabled. -arca
-	 */
-	write_seqlock(&xtime_lock);
 
-	do_timer(1);
+	xtime_update(1);
 
 #ifdef CONFIG_HEARTBEAT
 	static unsigned short n;
@@ -72,8 +64,6 @@ static irqreturn_t timer_interrupt(int irq, void *dummy)
 	__set_LEDS(n);
 #endif /* CONFIG_HEARTBEAT */
 
-	write_sequnlock(&xtime_lock);
-
 	update_process_times(user_mode(get_irq_regs()));
 
 	return IRQ_HANDLED;
--
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