From f0b0d88a825149ef3b06656886bc211c71dcb852 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Thu, 6 Sep 2018 16:37:24 -0700
Subject: [PATCH] kbuild: modules_install: warn when missing System.map file

If there is no System.map file for "make modules_install",
scripts/depmod.sh will silently exit with success, having done
nothing.  Since this is an unexpected situation, change it to
report a Warning for the missing file.  The behavior is not
changed except for the Warning message.

The (previous) silent success and new Warning can be reproduced
by:
$ make mrproper; make defconfig
$ make modules; make modules_install

and since System.map is produced by "make vmlinux", the steps
above omit producing the System.map file.

Reported-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
 scripts/depmod.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scripts/depmod.sh b/scripts/depmod.sh
index e5f0aad75b964..e083bcae343f3 100755
--- a/scripts/depmod.sh
+++ b/scripts/depmod.sh
@@ -11,6 +11,7 @@ DEPMOD=$1
 KERNELRELEASE=$2
 
 if ! test -r System.map ; then
+	echo "Warning: modules_install: missing 'System.map' file. Skipping depmod." >&2
 	exit 0
 fi
 
-- 
GitLab