From: Masahiro Yamada
> Sent: 27 February 2021 14:20
>
> 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 $(SUBLEVEL)
>
> Replace empty SUBLEVEL or PATCHLEVEL with a zero.
You could do:
#define LINUX_VERSION_PATCHLEVEL ($(PATCHLEVEL) + 0)
David
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