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selftests/bpf: prevent unused variable warning in bpf_for()

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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@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20230309054015.4068562-2-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Andrii Nakryiko 2023-03-08 21:40:12 -08:00 committed by Alexei Starovoitov
parent 63d78b7e8c
commit 2498e6231b
1 changed files with 6 additions and 3 deletions
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9
tools/testing/selftests/bpf/progs/bpf_misc.h
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@ -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); \