linux-kernel - [PATCH 1/2] kbuild: fixdep: optimize code slightly

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Message-Id: <1437715126-6421-2-git-send-email-yamada.masahiro@socionext.com>
Date:	Fri, 24 Jul 2015 14:18:45 +0900
From:	Masahiro Yamada <yamada.masahiro@...ionext.com>
To:	linux-kbuild@...r.kernel.org
Cc:	Masahiro Yamada <yamada.masahiro@...ionext.com>,
	Michal Marek <mmarek@...e.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] kbuild: fixdep: optimize code slightly

If the target string matches "CONFIG_", move the pointer p
forward.  This saves several 7-chars adjustments.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 scripts/basic/fixdep.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index b304068..46cc1b3 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -251,7 +251,8 @@ static void parse_config_file(const char *map, size_t len)
 			continue;
 		if (memcmp(p, "CONFIG_", 7))
 			continue;
-		for (q = p + 7; q < map + len; q++) {
+		p += 7;
+		for (q = p; q < map + len; q++) {
 			if (!(isalnum(*q) || *q == '_'))
 				goto found;
 		}
@@ -260,9 +261,9 @@ static void parse_config_file(const char *map, size_t len)
 	found:
 		if (!memcmp(q - 7, "_MODULE", 7))
 			q -= 7;
-		if( (q-p-7) < 0 )
+		if (q - p < 0)
 			continue;
-		use_config(p+7, q-p-7);
+		use_config(p, q - p);
 	}
 }
 
-- 
1.9.1

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