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| author | Pedro Tammela <pctammela@gmail.com> | 2021-03-14 20:38:38 +0300 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2021-03-16 08:11:17 +0300 |
| commit | 0205e9de42911404902728911b03fc1469242419 (patch) | |
| tree | c8f0b87b5674b666291685f0cb0c0e4877d721ef /tools | |
| parent | 6503b9f29a47cdb4ebd6c36d8bbb018418415c2a (diff) | |
| download | linux-0205e9de42911404902728911b03fc1469242419.tar.xz | |
libbpf: Avoid inline hint definition from 'linux/stddef.h'
Linux headers might pull 'linux/stddef.h' which defines
'__always_inline' as the following:
#ifndef __always_inline
#define __always_inline inline
#endif
This becomes an issue if the program picks up the 'linux/stddef.h'
definition as the macro now just hints inline to clang.
This change now enforces the proper definition for BPF programs
regardless of the include order.
Signed-off-by: Pedro Tammela <pctammela@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210314173839.457768-1-pctammela@gmail.com
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/lib/bpf/bpf_helpers.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/tools/lib/bpf/bpf_helpers.h b/tools/lib/bpf/bpf_helpers.h index ae6c975e0b87..53ff81c49dbd 100644 --- a/tools/lib/bpf/bpf_helpers.h +++ b/tools/lib/bpf/bpf_helpers.h @@ -29,9 +29,10 @@ */ #define SEC(NAME) __attribute__((section(NAME), used)) -#ifndef __always_inline +/* Avoid 'linux/stddef.h' definition of '__always_inline'. */ +#undef __always_inline #define __always_inline inline __attribute__((always_inline)) -#endif + #ifndef __noinline #define __noinline __attribute__((noinline)) #endif |