On Wed, May 20, 2026 at 08:01:55PM +0200, Thomas Weißschuh wrote:
> As the output file is currently never created, the check will run every
> time, even if the inputs have not changed.
>
> Create an empty output file which allows make to skip the execution when
> it is not necessary.
>
> Fixes: 1211907ac0b5 ("tracing: Generate undef symbols allowlist for
> simple_ring_buffer")
> Fixes: 58b4bd18390e ("tracing: Adjust cmd_check_undefined to show unexpected
> undefined symbols")
> Signed-off-by: Thomas Weißschuh <[email protected]>
Reviewed-by: Nathan Chancellor <[email protected]>
Tested-by: Nathan Chancellor <[email protected]>
> ---
> kernel/trace/Makefile | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
> index 1decdce8cbef..b5797457f9f4 100644
> --- a/kernel/trace/Makefile
> +++ b/kernel/trace/Makefile
> @@ -154,7 +154,8 @@ quiet_cmd_check_undefined = NM $<
> echo "Unexpected symbols in $<:" >&2; \
> echo "$$undefsyms" >&2; \
> false; \
> - fi
> + fi; \
> + touch $@
>
> $(obj)/%.o.checked: $(obj)/%.o $(obj)/undefsyms_base.o FORCE
> $(call if_changed,check_undefined)
>
> ---
> base-commit: 254f49634ee16a731174d2ae34bc50bd5f45e731
> change-id: 20260520-tracing-ringbuffer-check-3a6e748d37b7
>
> Best regards,
> --
> Thomas Weißschuh <[email protected]>
>
--
Cheers,
Nathan
