The nospec.h header expects the per-architecture header file asm/barrier.h to optionally define array_index_mask_nospec(). Include that dependency to prevent inadvertent fallback to the default array_index_mask_nospec() implementation. The default implementation may not provide a full mitigation on architectures that perform data value speculation.
Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Will Deacon <[email protected]> Cc: Linus Torvalds <[email protected]> Reported-by: Christian Borntraeger <[email protected]> Signed-off-by: Dan Williams <[email protected]> --- include/linux/nospec.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/nospec.h b/include/linux/nospec.h index 172a19dc35ab..e791ebc65c9c 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
