linux-kernel - [PATCH] init: Reduce text space by removing a variable.

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Message-ID: <b9df5fa10901112157j449d104fm1a1281a6bef409f9@mail.gmail.com>
Date:	Mon, 12 Jan 2009 11:57:39 +0600
From:	"Rakib Mullick" <rakib.mullick@...il.com>
To:	"Linux-kernel Mailing List" <linux-kernel@...r.kernel.org>
Cc:	mingo@...e.hu, akpm@...ux-foundation.org
Subject: [PATCH] init: Reduce text space by removing a variable.

Impact: Reduce some text space.

We can carryout the function 'raid_setup' without the variable 'len'
and using a bit compiler optimization. Which also removes 8 bytes of
text space on my x86 system.

Signed-off-by: Rakib Mullick <rakib.mullick@...il.com>

--- linux-2.6-orig/init/do_mounts_md.c	2009-01-12 09:53:09.000000000 +0600
+++ linux-2.6/init/do_mounts_md.c	2009-01-12 11:12:39.734543784 +0600
@@ -243,17 +243,17 @@ static void __init md_setup_drive(void)

 static int __init raid_setup(char *str)
 {
-	int len, pos;
+	int pos;

-	len = strlen(str) + 1;
 	pos = 0;

-	while (pos < len) {
+	while (pos < strlen(str) + 1) {
 		char *comma = strchr(str+pos, ',');
 		int wlen;
 		if (comma)
 			wlen = (comma-str)-pos;
-		else	wlen = (len-1)-pos;
+		else	
+			wlen = strlen(str)-pos;

 		if (!strncmp(str, "noautodetect", wlen))
 			raid_noautodetect = 1;
--
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