linux-kernel - [PATCH 2/4] kheaders: avoid unnecessary process forks of grep

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Message-ID: <20241218103716.137489-2-masahiroy@kernel.org>
Date: Wed, 18 Dec 2024 19:37:06 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: linux-kbuild@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Masahiro Yamada <masahiroy@...nel.org>
Subject: [PATCH 2/4] kheaders: avoid unnecessary process forks of grep

Exclude include/generated/{utsversion.h,autoconf.h} by using the -path
option to reduce the cost of forking new processes.

No functional changes are intended.

Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

 kernel/gen_kheaders.sh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/gen_kheaders.sh b/kernel/gen_kheaders.sh
index a0e3fbf4afa4..c2eba1a0d772 100755
--- a/kernel/gen_kheaders.sh
+++ b/kernel/gen_kheaders.sh
@@ -48,9 +48,9 @@ all_dirs="$all_dirs $dir_list"
 # check include/generated/autoconf.h explicitly.
 #
 # Ignore them for md5 calculation to avoid pointless regeneration.
-headers_md5="$(find $all_dirs -name "*.h"			|
-		grep -v "include/generated/utsversion.h"	|
-		grep -v "include/generated/autoconf.h"	|
+headers_md5="$(find $all_dirs -name "*.h" -a			\
+		! -path include/generated/utsversion.h -a	\
+		! -path include/generated/autoconf.h		|
 		xargs ls -l | md5sum | cut -d ' ' -f1)"
 
 # Any changes to this script will also cause a rebuild of the archive.
-- 
2.43.0