[PATCH] kbuild: add extra-y to targets-for-modules

[WANG Chao]

extra-y target doesn't build for 'make M=...' since commit 6212804f2d78
("kbuild: do not create built-in objects for external module builds").

This especially breaks kpatch, which is using 'extra-y := kpatch.lds'
and 'make M=...' to build livepatch patch module.

Add extra-y to targets-for-modules so that such kind of build works
properly.

Signed-off-by: WANG Chao <chao.wang@xxxxxxxxx>
---
 scripts/Makefile.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index ae647379b579..0113a042d643 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -86,7 +86,7 @@ ifdef need-builtin
 targets-for-builtin += $(obj)/built-in.a
 endif
 
-targets-for-modules := $(patsubst %.o, %.mod, $(filter %.o, $(obj-m)))
+targets-for-modules := $(extra-y) $(patsubst %.o, %.mod, $(filter %.o, $(obj-m)))
 
 ifdef need-modorder
 targets-for-modules += $(obj)/modules.order
-- 
2.29.1