[PATCH] x86/nospec: Fixup array_index_nospec_mask() asm constraint

[Dan Williams]

Allow the compiler to handle @size as an immediate value rather than
allocating a register.

Reported-by: Linus Torvalds <torva...@linux-foundation.org>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Andy Lutomirski <l...@kernel.org>
Cc: H. Peter Anvin <h...@zytor.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: Dan Williams <dan.j.willi...@intel.com>
---
 arch/x86/include/asm/barrier.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/barrier.h b/arch/x86/include/asm/barrier.h
index 30d406146016..9e9d6f27825a 100644
--- a/arch/x86/include/asm/barrier.h
+++ b/arch/x86/include/asm/barrier.h
@@ -40,7 +40,7 @@ static inline unsigned long array_index_mask_nospec(unsigned 
long index,
 
        asm ("cmp %1,%2; sbb %0,%0;"
                        :"=r" (mask)
-                       :"r"(size),"r" (index)
+                       :"ir"(size),"r" (index)
                        :"cc");
        return mask;
 }