1 files changed, 1 insertions, 1 deletions

diff --git a/arch/powerpc/include/asm/word-at-a-time.h b/arch/powerpc/include/asm/word-at-a-time.h
index e4396a7d0f7c..4afe66aa1400 100644
--- a/arch/powerpc/include/asm/word-at-a-time.h
+++ b/arch/powerpc/include/asm/word-at-a-time.h
@@ -82,7 +82,7 @@ static inline unsigned long create_zero_mask(unsigned long bits)
             "andc       %1,%1,%2\n\t"
             "popcntd    %0,%1"
                 : "=r" (leading_zero_bits), "=&r" (trailing_zero_bit_mask)
-                : "r" (bits));
+                : "b" (bits));
 
         return leading_zero_bits;
 }