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tools headers: Syncronize linux/build_bug.h with the kernel sources

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To pick up the changes in:

  07a368b3f5 ("bug: introduce ASSERT_STRUCT_OFFSET")

This cset only introduces a build time assert macro, that may be useful
at some point for tooling, for now it silences this perf build warning:

  Warning: Kernel ABI header at 'tools/include/linux/build_bug.h' differs from latest version at 'include/linux/build_bug.h'
  diff -u tools/include/linux/build_bug.h include/linux/build_bug.h

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Maxim Levitsky <mlevitsk@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: http://lore.kernel.org/lkml/Y8f0jqQFYDAOBkHx@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2023-01-18 10:27:48 -03:00
parent d352588bbc
commit c905ecfbb8
1 changed files with 9 additions and 0 deletions
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9
tools/include/linux/build_bug.h
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@ -79,4 +79,13 @@
#define __static_assert(expr, msg, ...) _Static_assert(expr, msg) #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
#endif // static_assert #endif // static_assert
/*
* Compile time check that field has an expected offset
*/
#define ASSERT_STRUCT_OFFSET(type, field, expected_offset) \
BUILD_BUG_ON_MSG(offsetof(type, field) != (expected_offset), \
"Offset of " #field " in " #type " has changed.")
#endif /* _LINUX_BUILD_BUG_H */ #endif /* _LINUX_BUILD_BUG_H */