diff mbox series

[5.4,207/214] kheaders: optimize header copy for in-tree builds

Message ID 20200901151002.845982333@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Sept. 1, 2020, 3:11 p.m. UTC 
From: Masahiro Yamada <yamada.masahiro@socionext.com>


commit ea79e5168be644fdaf7d4e6a73eceaf07b3da76a upstream.

This script copies headers by the cpio command twice; first from
srctree, and then from objtree. However, when we building in-tree,
we know the srctree and the objtree are the same. That is, all the
headers copied by the first cpio are overwritten by the second one.

Skip the first cpio when we are building in-tree.

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

Signed-off-by: Matthias Maennich <maennich@google.com>

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>


---
 kernel/gen_kheaders.sh |   16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)
diff mbox series

Patch

--- a/kernel/gen_kheaders.sh
+++ b/kernel/gen_kheaders.sh
@@ -56,14 +56,16 @@  fi
 rm -rf $cpio_dir
 mkdir $cpio_dir
 
-pushd $srctree > /dev/null
-for f in $dir_list;
-	do find "$f" -name "*.h";
-done | cpio --quiet -pd $cpio_dir
-popd > /dev/null
+if [ "$building_out_of_srctree" ]; then
+	pushd $srctree > /dev/null
+	for f in $dir_list
+		do find "$f" -name "*.h";
+	done | cpio --quiet -pd $cpio_dir
+	popd > /dev/null
+fi
 
-# The second CPIO can complain if files already exist which can
-# happen with out of tree builds. Just silence CPIO for now.
+# The second CPIO can complain if files already exist which can happen with out
+# of tree builds having stale headers in srctree. Just silence CPIO for now.
 for f in $dir_list;
 	do find "$f" -name "*.h";
 done | cpio --quiet -pd $cpio_dir >/dev/null 2>&1