diff options
| author | Andrii Nakryiko <andriin@fb.com> | 2019-10-03 21:02:11 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2019-10-05 18:03:12 -0700 |
| commit | a53ba15d81995868651dd28a85d8045aef3d4e20 (patch) | |
| tree | 7039bc769c81e37de5dec53fea25e8286e4dfdb9 /tools/testing/selftests/bpf/bpf_helpers.h | |
| parent | 4bbbf164f1a5e970543dcdb7a396fc1cf477725b (diff) | |
libbpf: Fix BTF-defined map's __type macro handling of arrays
Due to a quirky C syntax of declaring pointers to array or function
prototype, existing __type() macro doesn't work with map key/value types
that are array or function prototype. One has to create a typedef first
and use it to specify key/value type for a BPF map. By using typeof(),
pointer to type is now handled uniformly for all kinds of types. Convert
one of self-tests as a demonstration.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191004040211.2434033-1-andriin@fb.com
Diffstat (limited to 'tools/testing/selftests/bpf/bpf_helpers.h')
| -rw-r--r-- | tools/testing/selftests/bpf/bpf_helpers.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/bpf_helpers.h b/tools/testing/selftests/bpf/bpf_helpers.h index 54a50699bbfd..9f77cbaac01c 100644 --- a/tools/testing/selftests/bpf/bpf_helpers.h +++ b/tools/testing/selftests/bpf/bpf_helpers.h @@ -3,7 +3,7 @@ #define __BPF_HELPERS__ #define __uint(name, val) int (*name)[val] -#define __type(name, val) val *name +#define __type(name, val) typeof(val) *name /* helper macro to print out debug messages */ #define bpf_printk(fmt, ...) \ |