selftests/bpf: Fix const qualifier warning in fexit_bpf2bpf.c

Building selftests with
clang 23.0.0 (6fae863eba8a72cdd82f37e7111a46a70be525e0) triggers
the following error:

  tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c:117:12:
  error: assigning to 'char *' from 'const char *' discards qualifiers
  [-Werror,-Wincompatible-pointer-types-discards-qualifiers]

The variable `tgt_name` is declared as `char *`, but it stores the
result of strstr(prog_name[i], "/"). Since `prog_name[i]` is a
`const char *`, the returned pointer should also be treated as
const-qualified.

Update `tgt_name` to `const char *` to match the type of the underlying
string and silence the compiler warning.

Signed-off-by: Varun R Mallya <varunrmallya@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Menglong Dong <menglong.dong@linux.dev>
Link: https://lore.kernel.org/bpf/20260305222132.470700-1-varunrmallya@gmail.com

diff --git a/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c b/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c
index 23d933f1aec69e449c02828343290be1be6ffb9b..92c20803ea765d8ba58272c96a02ed31fe97195b 100644 (file)
--- 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], "/");