linux-kernel - [PATCH] arch: ia64: kernel: palinfo.c: Optimization of the Code

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Message-Id: <1401659019-17586-1-git-send-email-rickard_strandqvist@spectrumdigital.se>
Date:	Sun,  1 Jun 2014 23:43:39 +0200
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghua.yu@...el.com>
Cc:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arch: ia64: kernel: palinfo.c:  Optimization of the Code

>From what I know, AND is faster then modulo.
Not sure if this is worth changing though.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
 arch/ia64/kernel/palinfo.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/ia64/kernel/palinfo.c b/arch/ia64/kernel/palinfo.c
index c39c3cd..7915b02 100644
--- a/arch/ia64/kernel/palinfo.c
+++ b/arch/ia64/kernel/palinfo.c
@@ -156,7 +156,8 @@ static void bitregister_process(struct seq_file *m, u64 *reg_info, int max)
 
 	for(; i < max; i++ ) {
 
-		if (i != 0 && (i%64) == 0) value = *++reg_info;
+		if (i != 0 && (i&63) == 0)
+			value = *++reg_info;
 
 		if ((value & 0x1) == 0 && skip == 0) {
 			if (begin  <= i - 2)
-- 
1.7.10.4

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