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

[Arnaldo Carvalho de Melo <acme@kernel.org>]

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>
---
 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