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Message-Id: <1326029549-2794-4-git-send-email-gilad@benyossef.com>
Date: Sun, 8 Jan 2012 15:32:23 +0200
From: Gilad Ben-Yossef <gilad@...yossef.com>
To: linux-kernel@...r.kernel.org
Cc: Gilad Ben-Yossef <gilad@...yossef.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org
Subject: [RFC PATCH v2 3/9] x86: 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: Thomas Gleixner <tglx@...utronix.de>
CC: Ingo Molnar <mingo@...hat.com>
CC: "H. Peter Anvin" <hpa@...or.com>
CC: x86@...nel.org
---
arch/x86/lib/cache-smp.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/x86/lib/cache-smp.c b/arch/x86/lib/cache-smp.c
index a3c6688..760f7e1 100644
--- a/arch/x86/lib/cache-smp.c
+++ b/arch/x86/lib/cache-smp.c
@@ -14,6 +14,7 @@ EXPORT_SYMBOL(wbinvd_on_cpu);
int wbinvd_on_all_cpus(void)
{
- return on_each_cpu(__wbinvd, NULL, 1);
+ on_each_cpu(__wbinvd, NULL, 1);
+ return 0;
}
EXPORT_SYMBOL(wbinvd_on_all_cpus);
--
1.7.0.4
--
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