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author | Linus Walleij <linus.walleij@linaro.org> | 2018-03-18 17:48:59 +0100 |
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committer | Linus Walleij <linus.walleij@linaro.org> | 2018-03-18 17:48:59 +0100 |
commit | 95260c17b27e4bdacf85022e629fb701b42cc190 (patch) | |
tree | cfc6963180d99e5f36752ca028821aaa109e860d /include/linux/nospec.h | |
parent | 4f9a4cd66c1201ce2b26ba895b2be63b8b38bb68 (diff) | |
parent | 0c8efd610b58cb23cefdfa12015799079aef94ae (diff) | |
download | op-kernel-dev-95260c17b27e4bdacf85022e629fb701b42cc190.zip op-kernel-dev-95260c17b27e4bdacf85022e629fb701b42cc190.tar.gz |
Merge tag 'v4.16-rc5' into devel
Linux 4.16-rc5 merged into the GPIO devel branch to resolve
a nasty conflict between fixes and devel in the RCAR driver.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'include/linux/nospec.h')
-rw-r--r-- | include/linux/nospec.h | 18 |
1 files changed, 2 insertions, 16 deletions
diff --git a/include/linux/nospec.h b/include/linux/nospec.h index b99bced..e791ebc 100644 --- a/include/linux/nospec.h +++ b/include/linux/nospec.h @@ -5,6 +5,7 @@ #ifndef _LINUX_NOSPEC_H #define _LINUX_NOSPEC_H +#include <asm/barrier.h> /** * array_index_mask_nospec() - generate a ~0 mask when index < size, 0 otherwise @@ -20,20 +21,6 @@ static inline unsigned long array_index_mask_nospec(unsigned long index, unsigned long size) { /* - * Warn developers about inappropriate array_index_nospec() usage. - * - * Even if the CPU speculates past the WARN_ONCE branch, the - * sign bit of @index is taken into account when generating the - * mask. - * - * This warning is compiled out when the compiler can infer that - * @index and @size are less than LONG_MAX. - */ - if (WARN_ONCE(index > LONG_MAX || size > LONG_MAX, - "array_index_nospec() limited to range of [0, LONG_MAX]\n")) - return 0; - - /* * Always calculate and emit the mask even if the compiler * thinks the mask is not needed. The compiler does not take * into account the value of @index under speculation. @@ -66,7 +53,6 @@ static inline unsigned long array_index_mask_nospec(unsigned long index, BUILD_BUG_ON(sizeof(_i) > sizeof(long)); \ BUILD_BUG_ON(sizeof(_s) > sizeof(long)); \ \ - _i &= _mask; \ - _i; \ + (typeof(_i)) (_i & _mask); \ }) #endif /* _LINUX_NOSPEC_H */ |