Commit eb6174f6 authored by Dan Williams's avatar Dan Williams Committed by Ingo Molnar

nospec: Include <asm/barrier.h> dependency

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.
Reported-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arch@vger.kernel.org
Link: http://lkml.kernel.org/r/151881605404.17395.1341935530792574707.stgit@dwillia2-desk3.amr.corp.intel.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent b98c6a16
...@@ -5,6 +5,7 @@ ...@@ -5,6 +5,7 @@
#ifndef _LINUX_NOSPEC_H #ifndef _LINUX_NOSPEC_H
#define _LINUX_NOSPEC_H #define _LINUX_NOSPEC_H
#include <asm/barrier.h>
/** /**
* array_index_mask_nospec() - generate a ~0 mask when index < size, 0 otherwise * array_index_mask_nospec() - generate a ~0 mask when index < size, 0 otherwise
......
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