builddeb: split libc headers deployment out into a function

Deploy user-space headers (linux-libc-dev package) in a separate
function for readability.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/package/builddeb

@@ -84,12 +84,25 @@ deploy_kernel_headers () {
 	ln -s /usr/src/linux-headers-$version $pdir/lib/modules/$version/build
 }
 
+deploy_libc_headers () {
+	pdir=$1
+
+	rm -rf $pdir
+
+	$MAKE -f $srctree/Makefile headers
+	$MAKE -f $srctree/Makefile headers_install INSTALL_HDR_PATH=$pdir/usr
+
+	# move asm headers to /usr/include/<libc-machine>/asm to match the structure
+	# used by Debian-based distros (to support multi-arch)
+	host_arch=$(dpkg-architecture -a$(cat debian/arch) -qDEB_HOST_MULTIARCH)
+	mkdir $pdir/usr/include/$host_arch
+	mv $pdir/usr/include/asm $pdir/usr/include/$host_arch/
+}
+
 version=$KERNELRELEASE
 tmpdir=debian/linux-image
-libc_headers_dir=debian/linux-libc-dev
 dbg_dir=debian/linux-image-dbg
 packagename=linux-image-$version
-libc_headers_packagename=linux-libc-dev
 dbg_packagename=$packagename-dbg
 
 if [ "$ARCH" = "um" ] ; then
@@ -113,7 +126,7 @@ esac
 BUILD_DEBUG=$(if_enabled_echo CONFIG_DEBUG_INFO Yes)
 
 # Setup the directory structure
-rm -rf "$tmpdir" "$libc_headers_dir" "$dbg_dir" debian/files
+rm -rf "$tmpdir" "$dbg_dir" debian/files
 mkdir -m 755 -p "$tmpdir/DEBIAN"
 mkdir -p "$tmpdir/lib" "$tmpdir/boot"
 
@@ -163,16 +176,6 @@ if is_enabled CONFIG_MODULES; then
 	fi
 fi
 
-if [ "$ARCH" != "um" ]; then
-	$MAKE -f $srctree/Makefile headers
-	$MAKE -f $srctree/Makefile headers_install INSTALL_HDR_PATH="$libc_headers_dir/usr"
-	# move asm headers to /usr/include/<libc-machine>/asm to match the structure
-	# used by Debian-based distros (to support multi-arch)
-	host_arch=$(dpkg-architecture -a$(cat debian/arch) -qDEB_HOST_MULTIARCH)
-	mkdir $libc_headers_dir/usr/include/$host_arch
-	mv $libc_headers_dir/usr/include/asm $libc_headers_dir/usr/include/$host_arch/
-fi
-
 # Install the maintainer scripts
 # Note: hook scripts under /etc/kernel are also executed by official Debian
 # kernel packages, as well as kernel packages built using make-kpkg.
@@ -202,7 +205,8 @@ if [ "$ARCH" != "um" ]; then
 	deploy_kernel_headers debian/linux-headers
 	create_package linux-headers-$version debian/linux-headers
 
-	create_package "$libc_headers_packagename" "$libc_headers_dir"
+	deploy_libc_headers debian/linux-libc-dev
+	create_package linux-libc-dev debian/linux-libc-dev
 fi
 
 create_package "$packagename" "$tmpdir"