From: Arnd Bergmann <[email protected]> commit 14dc3983b5dff513a90bd5a8cc90acaf7867c3d0 upstream.
genksyms does not know or care about the _Static_assert() built-in, and sometimes falls back to ignoring the later symbols, which causes undefined behavior such as WARNING: modpost: EXPORT symbol "ethtool_set_ethtool_phy_ops" [vmlinux] version generation failed, symbol will not be versioned. ld: net/ethtool/common.o: relocation R_AARCH64_ABS32 against `__crc_ethtool_set_ethtool_phy_ops' can not be used when making a shared object net/ethtool/common.o:(_ftrace_annotated_branch+0x0): dangerous relocation: unsupported relocation Redefine static_assert for genksyms to avoid that. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Arnd Bergmann <[email protected]> Suggested-by: Ard Biesheuvel <[email protected]> Cc: Masahiro Yamada <[email protected]> Cc: Michal Marek <[email protected]> Cc: Kees Cook <[email protected]> Cc: Rikard Falkeborn <[email protected]> Cc: Marco Elver <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- include/linux/build_bug.h | 5 +++++ 1 file changed, 5 insertions(+) --- a/include/linux/build_bug.h +++ b/include/linux/build_bug.h @@ -82,4 +82,9 @@ #endif /* __CHECKER__ */ +#ifdef __GENKSYMS__ +/* genksyms gets confused by _Static_assert */ +#define _Static_assert(expr, ...) +#endif + #endif /* _LINUX_BUILD_BUG_H */
