linux-kernel - [RFC PATCH v2 6/9] agp: avoid using on_each

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Date:	Sun,  8 Jan 2012 15:32:26 +0200
From:	Gilad Ben-Yossef <gilad@...yossef.com>
To:	linux-kernel@...r.kernel.org
Cc:	Gilad Ben-Yossef <gilad@...yossef.com>,
	David Airlie <airlied@...ux.ie>
Subject: [RFC PATCH v2 6/9] agp: avoid using on_each_cpu hard coded ret value

on_each_cpu always returns a hard coded return code of zero.

Removing all tests based on this return value saves run time
cycles for compares and code bloat for branches.

Signed-off-by: Gilad Ben-Yossef <gilad@...yossef.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Reviewed-by: Michal Nazarewicz <mina86@...a86.com>
CC: David Airlie <airlied@...ux.ie>
---
 drivers/char/agp/generic.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/drivers/char/agp/generic.c b/drivers/char/agp/generic.c
index b072648..b6a6f6f 100644
--- a/drivers/char/agp/generic.c
+++ b/drivers/char/agp/generic.c
@@ -1329,8 +1329,7 @@ static void ipi_handler(void *null)
 
 void global_cache_flush(void)
 {
-	if (on_each_cpu(ipi_handler, NULL, 1) != 0)
-		panic(PFX "timed out waiting for the other CPUs!\n");
+	on_each_cpu(ipi_handler, NULL, 1);
 }
 EXPORT_SYMBOL(global_cache_flush);
 
-- 
1.7.0.4

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