Commit be3233fb authored by Dan Williams's avatar Dan Williams Committed by Ingo Molnar

x86/speculation: Fix up array_index_nospec_mask() asm constraint

Allow the compiler to handle @size as an immediate value or memory
directly rather than allocating a register.
Reported-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/151797010204.1289.1510000292250184993.stgit@dwillia2-desk3.amr.corp.intel.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 3b3a371c
...@@ -40,7 +40,7 @@ static inline unsigned long array_index_mask_nospec(unsigned long index, ...@@ -40,7 +40,7 @@ static inline unsigned long array_index_mask_nospec(unsigned long index,
asm ("cmp %1,%2; sbb %0,%0;" asm ("cmp %1,%2; sbb %0,%0;"
:"=r" (mask) :"=r" (mask)
:"r"(size),"r" (index) :"g"(size),"r" (index)
:"cc"); :"cc");
return mask; return mask;
} }
......
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