prog_name is an array of const char * strings, so strstr() returns a
pointer into const data.

Store the result in a const char * to avoid discarding the const
qualifier.

With GCC 15 this triggers -Werror=discarded-qualifiers and breaks
the build of tools/testing/selftests/bpf.

Signed-off-by: Woojin Ji <random6.xyz@gmail.com>
---
 tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c b/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c
index f29fc789c14b..d8225da4c1af 100644
--- a/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c
+++ b/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c
@@ -111,7 +111,7 @@ static void test_fexit_bpf2bpf_common(const char *obj_file,
 		struct bpf_link_info link_info;
 		struct bpf_program *pos;
 		const char *pos_sec_name;
-		char *tgt_name;
+		const char *tgt_name;
 		__s32 btf_id;
 
 		tgt_name = strstr(prog_name[i], "/");
-- 
2.53.0

On 4/9/26 5:11 PM, Woojin Ji wrote:
> prog_name is an array of const char * strings, so strstr() returns a
> pointer into const data.
>
> Store the result in a const char * to avoid discarding the const
> qualifier.
>
> With GCC 15 this triggers -Werror=discarded-qualifiers and breaks
> the build of tools/testing/selftests/bpf.
>
> Signed-off-by: Woojin Ji <random6.xyz@gmail.com>
> ---
>   tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c b/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c
> index f29fc789c14b..d8225da4c1af 100644
> --- a/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c
> +++ b/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c
> @@ -111,7 +111,7 @@ static void test_fexit_bpf2bpf_common(const char *obj_file,
>   		struct bpf_link_info link_info;
>   		struct bpf_program *pos;
>   		const char *pos_sec_name;
> -		char *tgt_name;
> +		const char *tgt_name;
>   		__s32 btf_id;
>   
>   		tgt_name = strstr(prog_name[i], "/");

Already exist.

https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c?id=ca0f39a369c5f927c3d004e63a5a778b08a9df94

Thanks for the pointer.

I missed that commit ca0f39a369c5 was already applied to bpf-next.
Sorry for sending a duplicate patch.