path: root/tools
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authorArnd Bergmann <arnd@arndb.de>2019-09-10 13:56:22 +0200
committerWill Deacon <will@kernel.org>2019-09-17 12:11:50 +0100
commit920fdab7b3ce98c14c840261e364f490f3679a62 (patch)
tree2446d3b17ff19a9be65fd24131d1db0ab616976b /tools
parentarm64: remove __iounmap (diff)
arm64: fix unreachable code issue with cmpxchg
On arm64 build with clang, sometimes the __cmpxchg_mb is not inlined when CONFIG_OPTIMIZE_INLINING is set. Clang then fails a compile-time assertion, because it cannot tell at compile time what the size of the argument is: mm/memcontrol.o: In function `__cmpxchg_mb': memcontrol.c:(.text+0x1a4c): undefined reference to `__compiletime_assert_175' memcontrol.c:(.text+0x1a4c): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `__compiletime_assert_175' Mark all of the cmpxchg() style functions as __always_inline to ensure that the compiler can see the result. Acked-by: Nick Desaulniers <ndesaulniers@google.com> Reported-by: Nathan Chancellor <natechancellor@gmail.com> Link: https://github.com/ClangBuiltLinux/linux/issues/648 Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Andrew Murray <andrew.murray@arm.com> Tested-by: Andrew Murray <andrew.murray@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Will Deacon <will@kernel.org>
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