Re: [PATCH] scripts/sorttable: Mark long_size as __maybe_unused

[Nicolas Schier <n.schier@fritz.com>]

On Mon, Aug 31, 2026 at 06:46:31PM -0700, Nathan Chancellor wrote:
> When building in a kernel tree prior to commit b055f4c431e3 ("sorttable:
> Move ELF parsing into scripts/elf-parse.[ch]") with clang-23 or newer,
> which implements a new warning under -Wunused-but-set-variable for
> static global variable, there is a warning from sorttable because
> long_size is unused when MCOUNT_SORT_ENABLED is not set:
> 
>   scripts/sorttable.c:452:12: error: variable 'long_size' set but not used [-Werror,-Wunused-but-set-global]
>     452 | static int long_size;
>         |            ^
> 
> Mark long_size as __maybe_unused to avoid inserting more ugly #ifdef
> directives while insuring the warning does not reappear, as the
> aforementioned change does not alter the uses of long_size, so it
> appears to be coincidence that the warning disappears after this
> refactoring.
> 
> Cc: stable@vger.kernel.org
> Signed-off-by: Nathan Chancellor <nathan@kernel.org>
> ---
> This is breaking our builds on stable:
> 
>   https://github.com/ClangBuiltLinux/continuous-integration2/actions/runs/33143924291
> 
> There was a previous patch sent for this issue
> 
>   https://lore.kernel.org/20260603191708.27241-1-beakthoven@gmail.com/
> 
> but it was marked as stable only. I think this should be taken via
> mainline and backported the normal way, as it appears to be coincidence
> that the warning is not present in mainline. It does not look like
> scripts/sorttable.c has a formal owner according to MAINTAINERS so this
> could either go through one of Steve's trees or the kbuild tree.
> ---
>  scripts/sorttable.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Thanks!

Tested-by: Nicolas Schier <n.schier@fritz.com>

-- 
Nicolas