1 files changed, 4 insertions, 2 deletions

diff --git a/arch/sparc64/lib/dec_and_lock.S b/arch/sparc64/lib/dec_and_lock.S
index 7e6fdaebedba..8ee288dd0afc 100644
--- a/arch/sparc64/lib/dec_and_lock.S
+++ b/arch/sparc64/lib/dec_and_lock.S
@@ -48,8 +48,9 @@ start_to_zero:
 #endif
 to_zero:
         ldstub  [%o1], %g3
+        membar  #StoreLoad | #StoreStore
         brnz,pn %g3, spin_on_lock
-         membar #StoreLoad | #StoreStore
+         nop
 loop2:  cas     [%o0], %g2, %g7         /* ASSERT(g7 == 0) */
         cmp     %g2, %g7
 
@@ -71,8 +72,9 @@ loop2:	cas	[%o0], %g2, %g7		/* ASSERT(g7 == 0) */
          nop
 spin_on_lock:
         ldub    [%o1], %g3
+        membar  #LoadLoad
         brnz,pt %g3, spin_on_lock
-         membar #LoadLoad
+         nop
         ba,pt   %xcc, to_zero
          nop
         nop