Allow the compiler to handle @size as an immediate value or memory
directly 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>
---
v2: use the 'g' constraint since CMP handles memory targets (Linus)
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..e1259f043ae9 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)
+ :"g"(size),"r" (index)
:"cc");
return mask;
}
