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Subject[PATCH 4/7] builddeb: avoid invoking sub-shells where possible
Date
The commands surrounded by ( ... ) is run in a sub-shell, but you do
not have to invoke it for every single line.

Use just one ( ... ) for creating debian/hdrsrcfiles.

For tar, use -C option instead.

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

scripts/package/builddeb | 39 ++++++++++++++++++++++++++-------------
1 file changed, 26 insertions(+), 13 deletions(-)

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index 9b92745bf13a..7c561ffe1de0 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -165,21 +165,34 @@ EOF
done

# Build kernel header package
-(cd $srctree; find . arch/$SRCARCH -maxdepth 1 -name Makefile\*) > debian/hdrsrcfiles
-(cd $srctree; find include scripts -type f -o -type l) >> debian/hdrsrcfiles
-(cd $srctree; find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform) >> debian/hdrsrcfiles
-(cd $srctree; find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f) >> debian/hdrsrcfiles
-if is_enabled CONFIG_STACK_VALIDATION; then
- echo tools/objtool/objtool >> debian/hdrobjfiles
-fi
-find arch/$SRCARCH/include Module.symvers include scripts -type f >> debian/hdrobjfiles
-if is_enabled CONFIG_GCC_PLUGINS; then
- find scripts/gcc-plugins -name \*.so >> debian/hdrobjfiles
-fi
+(
+ cd $srctree
+ find . arch/$SRCARCH -maxdepth 1 -name Makefile\*
+ find include scripts -type f -o -type l
+ find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform
+ find arch/$SRCARCH -name include -type f
+
+ if [ -d arch/$SRCARCH/scripts ]; then
+ find arch/$SRCARCH/scripts -type f
+ fi
+) > debian/hdrsrcfiles
+
+{
+ if is_enabled CONFIG_STACK_VALIDATION; then
+ find tools/objtool -type f -executable
+ fi
+
+ find arch/$SRCARCH/include Module.symvers include scripts -type f
+
+ if is_enabled CONFIG_GCC_PLUGINS; then
+ find scripts/gcc-plugins -name \*.so -o -name gcc-common.h
+ fi
+} > debian/hdrobjfiles
+
destdir=$kernel_headers_dir/usr/src/linux-headers-$version
mkdir -p "$destdir"
-(cd $srctree; tar -c -f - -T -) < debian/hdrsrcfiles | (cd $destdir; tar -xf -)
-tar -c -f - -T - < debian/hdrobjfiles | (cd $destdir; tar -xf -)
+tar -c -f - -C $srctree -T debian/hdrsrcfiles | tar -xf - -C $destdir
+tar -c -f - -T debian/hdrobjfiles | tar -xf - -C $destdir
cp $KCONFIG_CONFIG $destdir/.config # copy .config manually to be where it's expected to be
ln -sf "/usr/src/linux-headers-$version" "$kernel_headers_dir/lib/modules/$version/build"
rm -f debian/hdrsrcfiles debian/hdrobjfiles
--
2.17.1
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