linux-kernel - [RFC PATCH v2 5/9] ppc: avoid using on_each

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Message-Id: <1326029549-2794-6-git-send-email-gilad@benyossef.com>
Date:	Sun,  8 Jan 2012 15:32:25 +0200
From:	Gilad Ben-Yossef <gilad@...yossef.com>
To:	linux-kernel@...r.kernel.org
Cc:	Gilad Ben-Yossef <gilad@...yossef.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	linuxppc-dev@...ts.ozlabs.org, devicetree-discuss@...ts.ozlabs.org
Subject: [RFC PATCH v2 5/9] ppc: 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: Benjamin Herrenschmidt <benh@...nel.crashing.org>
CC: Paul Mackerras <paulus@...ba.org>
CC: Grant Likely <grant.likely@...retlab.ca>
CC: Rob Herring <rob.herring@...xeda.com>
CC: linuxppc-dev@...ts.ozlabs.org
CC: devicetree-discuss@...ts.ozlabs.org
---
 arch/powerpc/kernel/rtas.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 517b1d8..829629e 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -850,8 +850,7 @@ int rtas_ibm_suspend_me(struct rtas_args *args)
 	/* Call function on all CPUs.  One of us will make the
 	 * rtas call
 	 */
-	if (on_each_cpu(rtas_percpu_suspend_me, &data, 0))
-		atomic_set(&data.error, -EINVAL);
+	on_each_cpu(rtas_percpu_suspend_me, &data, 0);
 
 	wait_for_completion(&done);
 
-- 
1.7.0.4

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