On Wed, Aug 31, 2022 at 06:17:19AM +0200, Nicolas Schier wrote:

From: Jing Leng jleng@ambarella.com

commit 23a0cb8e3225122496bfa79172005c587c2d64bf upstream.

When building an external module, if users don't need to separate the compilation output and source code, they run the following command: "make -C $(LINUX_SRC_DIR) M=$(PWD)". At this point, "$(KBUILD_EXTMOD)" and "$(src)" are the same.

If they need to separate them, they run "make -C $(KERNEL_SRC_DIR) O=$(KERNEL_OUT_DIR) M=$(OUT_DIR) src=$(PWD)". Before running the command, they need to copy "Kbuild" or "Makefile" to "$(OUT_DIR)" to prevent compilation failure.

So the kernel should change the included path to avoid the copy operation.

Signed-off-by: Jing Leng jleng@ambarella.com [masahiro: I do not think "M=$(OUT_DIR) src=$(PWD)" is the official way, but this patch is a nice clean up anyway.] Signed-off-by: Masahiro Yamada masahiroy@kernel.org Signed-off-by: Nicolas Schier n.schier@avm.de

---

scripts/Makefile.modpost | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost index 12a87be0fb44..42154b6df652 100644 --- a/scripts/Makefile.modpost +++ b/scripts/Makefile.modpost @@ -87,8 +87,7 @@ obj := $(KBUILD_EXTMOD) src := $(obj) # Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS -include $(if $(wildcard $(KBUILD_EXTMOD)/Kbuild), \

•         $(KBUILD_EXTMOD)/Kbuild, $(KBUILD_EXTMOD)/Makefile)
  

+include $(if $(wildcard $(src)/Kbuild), $(src)/Kbuild, $(src)/Makefile) # modpost option for external modules MODPOST += -e -- 2.37.2

Now queued up, thanks.

greg k-h