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| author | Andrii Nakryiko <andrii@kernel.org> | 2022-05-09 03:41:46 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2022-05-09 18:15:32 +0300 |
| commit | f760d0537925e2973ed3adc2e590aa2968d0e8dc (patch) | |
| tree | a19c4f25b7f75e27bf680927ff6e28efe5f1f60b /tools/testing/selftests/bpf/progs/exhandler_kern.c | |
| parent | 785c3342cf6c520250258d8d7bc0cae1d4461dc8 (diff) | |
| download | linux-f760d0537925e2973ed3adc2e590aa2968d0e8dc.tar.xz | |
libbpf: Provide barrier() and barrier_var() in bpf_helpers.h
Add barrier() and barrier_var() macros into bpf_helpers.h to be used by
end users. While a bit advanced and specialized instruments, they are
sometimes indispensable. Instead of requiring each user to figure out
exact asm volatile incantations for themselves, provide them from
bpf_helpers.h.
Also remove conflicting definitions from selftests. Some tests rely on
barrier_var() definition being nothing, those will still work as libbpf
does the #ifndef/#endif guarding for barrier() and barrier_var(),
allowing users to redefine them, if necessary.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220509004148.1801791-8-andrii@kernel.org
Diffstat (limited to 'tools/testing/selftests/bpf/progs/exhandler_kern.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/exhandler_kern.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/tools/testing/selftests/bpf/progs/exhandler_kern.c b/tools/testing/selftests/bpf/progs/exhandler_kern.c index dd9b30a0f0fc..20d009e2d266 100644 --- a/tools/testing/selftests/bpf/progs/exhandler_kern.c +++ b/tools/testing/selftests/bpf/progs/exhandler_kern.c @@ -7,8 +7,6 @@ #include <bpf/bpf_tracing.h> #include <bpf/bpf_core_read.h> -#define barrier_var(var) asm volatile("" : "=r"(var) : "0"(var)) - char _license[] SEC("license") = "GPL"; unsigned int exception_triggered; |