Re: [PATCH 1/1] perf test workload: Use unsigned int in code_with_type instead of uint

[Namhyung Kim <namhyung@kernel.org>]

On Fri, Sep 25, 2026 at 05:32:18PM +0200, Arnaldo Carvalho de Melo wrote:
> The declaration of the Rust helper test_rs() uses "uint", a BSD-ism
> that lives in <sys/types.h>, so on glibc it is only visible by
> accident: glibc's <stdlib.h> includes <sys/types.h>, where uint is
> exposed under __USE_MISC, which is on by default.
> 
> musl does none of that: its <stdlib.h> doesn't include <sys/types.h>
> and it typedefs uint there only when _GNU_SOURCE/_BSD_SOURCE is
> defined, while nothing else in this translation unit includes
> <sys/types.h>. Building it on Alpine therefore fails with:
> 
>   tests/workloads/code_with_type.c:9:21: error: unknown type name 'uint'; did you mean 'int'?
>   tests/workloads/code_with_type.c:39:17: error: implicit declaration of function 'test_rs' [-Wimplicit-function-declaration]
> 
> The second error is a consequence of the first one: with the
> declaration at line 9 rejected, the call at line 39 has no prototype,
> which is an error since gcc 14.
> 
> The breakage is only visible when rustc is present, because
> tests/workloads/Build adds code_with_type.o when CONFIG_RUST_SUPPORT
> is detected, and tools/build/feature only checks for "rustc
> --version". That is why alpine:3.23 and alpine:3.24 fail while
> alpine:3.22 and alpine:edge, lacking rustc, build fine and hide it.
> 
> Use unsigned int, which needs no header at all.
> 
> Fixes: 2e05bb52a12d3 ("perf test workload: Add code_with_type test workload")
> Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
> Assisted-by: LLM
> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Acked-by: Namhyung Kim <namhyung@kernel.org>

Thanks,
Namhyung

> ---
>  tools/perf/tests/workloads/code_with_type.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/tests/workloads/code_with_type.c b/tools/perf/tests/workloads/code_with_type.c
> index 65d7be7dac24d411..d2d437b86e0c6dbd 100644
> --- a/tools/perf/tests/workloads/code_with_type.c
> +++ b/tools/perf/tests/workloads/code_with_type.c
> @@ -6,7 +6,7 @@
>  #include <linux/compiler.h>
>  #include "../tests.h"
>  
> -extern void test_rs(uint count);
> +extern void test_rs(unsigned int count);
>  
>  static volatile sig_atomic_t done;
>  
> -- 
> 2.55.0
>