On Sat, Feb 27, 2021 at 11:20:23PM +0900, Masahiro Yamada wrote:

Commit 9b82f13e7ef3 ("kbuild: clamp SUBLEVEL to 255") breaks the build
if SUBLEVEL or PATCHLEVEL is empty.

Commit 78d3bb4483ba ("kbuild: Fix <linux/version.h> for empty SUBLEVEL
or PATCHLEVEL") fixed the issue by prepending a zero.

This time, we cannot take the same approach because we have C code:

 #define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL)
 #define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)

Replace empty SUBLEVEL or PATCHLEVEL with a zero.

Fixes: 9b82f13e7ef3 ("kbuild: clamp SUBLEVEL to 255")
Reported-by: Christian Zigotzky <redacted>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

Reviewed-and-tested-by: Sasha Levin [off-list ref]

Thank you!

-- 
Thanks,
Sasha