[PATCH] kbuild: force to build vmlinux if CONFIG_MODVERSION=y - Linux-stable-mirror

31 May 2020

This code does not work as stated in the comment.
$(CONFIG_MODVERSIONS) is always empty because it is expanded before
include/config/auto.conf is included. Hence, 'make modules' with
CONFIG_MODVERSION=y cannot record the version CRCs.
This has been broken since 2003, commit ("kbuild: Enable modules to be
build using the "make dir/" syntax"). [1]
[1]: https://git.kernel.org/pub/scm/linux/kernel/git/history/history.git/commit/?...
Cc: linux-stable stable@vger.kernel.org # v2.5.71+
Signed-off-by: Masahiro Yamada masahiroy@kernel.org
---
Makefile | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 2df903429d31..b856f84e28c9 100644
--- a/Makefile
+++ b/Makefile
@@ -619,12 +619,8 @@ KBUILD_MODULES :=
 KBUILD_BUILTIN := 1
# If we have only "make modules", don't compile built-in objects.
-# When we're building modules with modversions, we need to consider
-# the built-in objects during the descend as well, in order to
-# make sure the checksums are up to date before we record them.
-
 ifeq ($(MAKECMDGOALS),modules)
-  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
+  KBUILD_BUILTIN :=
 endif
# If we have "make <whatever> modules", compile modules
@@ -1337,6 +1333,13 @@ ifdef CONFIG_MODULES
all: modules
+# When we're building modules with modversions, we need to consider
+# the built-in objects during the descend as well, in order to
+# make sure the checksums are up to date before we record them.
+ifdef CONFIG_MODVERSIONS
+  KBUILD_BUILTIN := 1
+endif
+
 # Build modules
 #
 # A module can be listed more than once in obj-m resulting in
-- 
2.25.1


    