[PATCH v4] modules_install: make missing $DEPMOD a Warning instead of an Error

From: Randy Dunlap
Date: Tue Aug 28 2018 - 15:59:19 EST

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

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@xxxxxxxxxxxxx>
Reported-by: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxxxxxxx>
Cc: Lucas De Marchi <lucas.de.marchi@xxxxxxxxx>
Cc: Michal Marek <michal.lkml@xxxxxxxxxxx>
Cc: Jessica Yu <jeyu@xxxxxxxxxx>
Cc: Chih-Wei Huang <cwhuang@xxxxxxxxxxxx>
Cc: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>
v2: add missing "exit 0" and update the commit message (no Error).
v3: add Fixes: and Cc: stable
v4: add Reported-by: and more explanation for the patch.

scripts/depmod.sh | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- lnx-418.orig/scripts/depmod.sh
+++ lnx-418/scripts/depmod.sh
@@ -15,9 +15,9 @@ if ! test -r System.map ; then

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

# older versions of depmod require the version string to start with three