linux-kernel - [PATCH 4/4] [TIME] Simplify smp_call_function

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Date:	Sat, 21 Jul 2007 17:57:57 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-kernel@...r.kernel.org, Avi Kivity <avi@...ranet.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>
Subject: [PATCH 4/4] [TIME] Simplify smp_call_function_single() call sequence

smp_call_function_single() now knows how to call the function on the
current cpu.

Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...e.hu>
Signed-off-by: Avi Kivity <avi@...ranet.com>
---
 kernel/time/tick-broadcast.c |   17 ++++-------------
 1 files changed, 4 insertions(+), 13 deletions(-)

diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index 8001d37..fe36b9a 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -241,21 +241,12 @@ out:
  */
 void tick_broadcast_on_off(unsigned long reason, int *oncpu)
 {
-	int cpu = get_cpu();
-
-	if (!cpu_isset(*oncpu, cpu_online_map)) {
+	if (!cpu_isset(*oncpu, cpu_online_map))
 		printk(KERN_ERR "tick-braodcast: ignoring broadcast for "
 		       "offline CPU #%d\n", *oncpu);
-	} else {
-
-		if (cpu == *oncpu)
-			tick_do_broadcast_on_off(&reason);
-		else
-			smp_call_function_single(*oncpu,
-						 tick_do_broadcast_on_off,
-						 &reason, 1, 1);
-	}
-	put_cpu();
+	else
+		smp_call_function_single(*oncpu, tick_do_broadcast_on_off,
+					 &reason, 1, 1);
 }
 
 /*
-- 
1.5.2.4

-
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