[PATCH v4.14] kbuild: make missing $DEPMOD a Warning instead of an Error

From: Randy Dunlap <rdunlap@infradead.org>

[ Upstream commit 914b087ff9e0e9a399a4927fa30793064afc0178 ]

When $DEPMOD is not found, only print a warning instead of exiting
with an error message and error status:

Warning: 'make modules_install' requires /sbin/depmod. Please install it.
This is probably in the kmod package.

Change the Error to a Warning because "not all build hosts for cross
compiling Linux are Linux systems and are able to provide a working
port of depmod, especially at the file patch /sbin/depmod."

I.e., "make modules_install" may be used to copy/install the
loadable modules files to a target directory on a build system and
then transferred to an embedded device where /sbin/depmod is run
instead of it being run on the build system.

Fixes: 934193a654c1 ("kbuild: verify that $DEPMOD is installed")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: H. Nikolaus Schaller <redacted>
Cc: stable@vger.kernel.org
Cc: Lucas De Marchi <redacted>
Cc: Lucas De Marchi <redacted>
Cc: Michal Marek <redacted>
Cc: Jessica Yu <jeyu@kernel.org>
Cc: Chih-Wei Huang <redacted>
Signed-off-by: Masahiro Yamada <redacted>
Signed-off-by: Maxim Zhukov <redacted>
---
 scripts/depmod.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/depmod.sh b/scripts/depmod.sh
index f41b0a4b575c..cf5b2b24b3cf 100755
--- a/scripts/depmod.sh
+++ b/scripts/depmod.sh

@@ -16,9 +16,9 @@ if ! test -r System.map ; then
 fi
 
 if [ -z $(command -v $DEPMOD) ]; then
-	echo "'make modules_install' requires $DEPMOD. Please install it." >&2
+	echo "Warning: 'make modules_install' requires $DEPMOD. Please install it." >&2
 	echo "This is probably in the kmod package." >&2
-	exit 1
+	exit 0
 fi
 
 # older versions of depmod don't support -P <symbol-prefix>

-- 
2.19.0