Add __attribute__((unused)) to inner __p variable inside bpf_for(), bpf_for_each(), and bpf_repeat() macros to avoid compiler warnings about unused variable. Reported-by: Tejun Heo <tj@xxxxxxxxxx> Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx> --- tools/testing/selftests/bpf/progs/bpf_misc.h | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/bpf_misc.h b/tools/testing/selftests/bpf/progs/bpf_misc.h index 43b154a639e7..c95eb603403c 100644 --- a/tools/testing/selftests/bpf/progs/bpf_misc.h +++ b/tools/testing/selftests/bpf/progs/bpf_misc.h @@ -115,7 +115,8 @@ extern void bpf_iter_num_destroy(struct bpf_iter_num *it) __ksym; struct bpf_iter_##type ___it __attribute__((aligned(8), /* enforce, just in case */, \ cleanup(bpf_iter_##type##_destroy))), \ /* ___p pointer is just to call bpf_iter_##type##_new() *once* to init ___it */ \ - *___p = (bpf_iter_##type##_new(&___it, ##args), \ + *___p __attribute__((unused)) = ( \ + bpf_iter_##type##_new(&___it, ##args), \ /* this is a workaround for Clang bug: it currently doesn't emit BTF */ \ /* for bpf_iter_##type##_destroy() when used from cleanup() attribute */ \ (void)bpf_iter_##type##_destroy, (void *)0); \ @@ -143,7 +144,8 @@ extern void bpf_iter_num_destroy(struct bpf_iter_num *it) __ksym; struct bpf_iter_num ___it __attribute__((aligned(8), /* enforce, just in case */ \ cleanup(bpf_iter_num_destroy))), \ /* ___p pointer is necessary to call bpf_iter_num_new() *once* to init ___it */ \ - *___p = (bpf_iter_num_new(&___it, (start), (end)), \ + *___p __attribute__((unused)) = ( \ + bpf_iter_num_new(&___it, (start), (end)), \ /* this is a workaround for Clang bug: it currently doesn't emit BTF */ \ /* for bpf_iter_num_destroy() when used from cleanup() attribute */ \ (void)bpf_iter_num_destroy, (void *)0); \ @@ -167,7 +169,8 @@ extern void bpf_iter_num_destroy(struct bpf_iter_num *it) __ksym; struct bpf_iter_num ___it __attribute__((aligned(8), /* enforce, just in case */ \ cleanup(bpf_iter_num_destroy))), \ /* ___p pointer is necessary to call bpf_iter_num_new() *once* to init ___it */ \ - *___p = (bpf_iter_num_new(&___it, 0, (N)), \ + *___p __attribute__((unused)) = ( \ + bpf_iter_num_new(&___it, 0, (N)), \ /* this is a workaround for Clang bug: it currently doesn't emit BTF */ \ /* for bpf_iter_num_destroy() when used from cleanup() attribute */ \ (void)bpf_iter_num_destroy, (void *)0); \ -- 2.34.1
