[PATCH] kbuild: make module name conflict fatal error

From: Masahiro Yamada
Date: Mon May 11 2020 - 00:24:04 EST


I think all the warnings have been fixed by now. Make it a fatal error.

Check it before modpost because we need to stop building *.ko files.
Also, pass modules.order via a script parameter.

Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
---

Makefile | 7 +++++--
scripts/modules-check.sh | 16 +++++++++++++---
2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 1162cb04860c..a2e4d0945500 100644
--- a/Makefile
+++ b/Makefile
@@ -1328,9 +1328,12 @@ all: modules
# using awk while concatenating to the final file.

PHONY += modules
-modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order
+modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
+
+PHONY += modules_check
+modules_check: modules.order
+ $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<

modules.order: descend
$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
diff --git a/scripts/modules-check.sh b/scripts/modules-check.sh
index f51f446707b8..43de226071ae 100755
--- a/scripts/modules-check.sh
+++ b/scripts/modules-check.sh
@@ -3,14 +3,24 @@

set -e

+if [ $# != 1 ]; then
+ echo "Usage: $0 <modules.order>" >& 2
+ exit 1
+fi
+
+exit_code=0
+
# Check uniqueness of module names
check_same_name_modules()
{
- for m in $(sed 's:.*/::' modules.order | sort | uniq -d)
+ for m in $(sed 's:.*/::' $1 | sort | uniq -d)
do
- echo "warning: same module names found:" >&2
+ echo "error: the following would cause module name conflict:" >&2
sed -n "/\/$m/s:^: :p" modules.order >&2
+ exit_code=1
done
}

-check_same_name_modules
+check_same_name_modules "$1"
+
+exit $exit_code
--
2.25.1