In this workflow:
$ make ARCH=um defconfig && make ARCH=um -j8
[snip]
$ make ARCH=um mrproper
[snip]
$ make ARCH=um defconfig O=./build_um && make ARCH=um -j8 O=./build_um
[snip]
CC scripts/mod/empty.o
In file included from ../include/linux/types.h:6,
from ../include/linux/mod_devicetable.h:12,
from ../scripts/mod/devicetable-offsets.c:3:
../include/uapi/linux/types.h:5:10: fatal error: asm/types.h: No such file or directory
5 | #include <asm/types.h>
| ^~~~~~~~~~~~~
compilation terminated.
make[2]: *** [../scripts/Makefile.build:100: scripts/mod/devicetable-offsets.s] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/home/iha/sdb/opensource/lkmp/linux-kselftest.git/Makefile:1140: prepare0] Error 2
make[1]: Leaving directory '/home/iha/sdb/opensource/lkmp/linux-kselftest.git/build_um'
make: *** [Makefile:180: sub-make] Error 2
The cause of the error was because arch/$(SUBARCH)/include/generated files
weren't properly cleaned by `make ARCH=um mrproper`.
Fixes: a788b2ed81ab ("kbuild: check arch/$(SRCARCH)/include/generated
before out-of-tree build").
Reported-by: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Vitor Massaru Iha <vitor@xxxxxxxxxxx>
Reviewed-by: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
Tested-by: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
Suggested-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Link: https://groups.google.com/forum/#!msg/kunit-dev/QmA27YEgEgI/hvS1kiz2CwAJ
---
v2:
* Explains what this PATCH does and the importance as suggested
by Brendan Higgins.
v3:
* This problem only affects ARCH=um builds then arch/um/Makefile has
been changed as suggested by Masahiro Yamada;
* And with that the description has also been changed, and also to explain
missing points and correct the tags as suggested by Masahiro Yamada:
- Fix missing command `make ARCH=um mrproper`;
- Add build error message;
- Add "Fixes" tag instead of "This bug was ...";
- Add "Link" tag instead of "Related bug ...";
- Add Reported-by and Suggested-by;
---
arch/um/Makefile | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/um/Makefile b/arch/um/Makefile
index d2daa206872d..275f5ffdf6f0 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -140,6 +140,7 @@ export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
# When cleaning we don't include .config, so we don't include
# TT or skas makefiles and don't clean skas_ptregs.h.
CLEAN_FILES += linux x.i gmon.out
+MRPROPER_DIRS += arch/$(SUBARCH)/include/generated
archclean:
@find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
--
2.25.1
