[PATCH] fix Itanium copy_user for uninitialized NaT

Fix use of unitialized register to avoid NaT consumption fault.

arch/ia64/lib/copy_user.S

@@ -237,15 +237,17 @@ GLOBAL_ENTRY(__copy_user)
 .copy_user_bit##rshift:						\
 1:								\
 	EX(.failure_out,(EPI) st8 [dst1]=tmp,8);		\
-(EPI_1) shrp tmp=val1[PIPE_DEPTH-3],val1[PIPE_DEPTH-2],rshift;	\
-	EX(3f,(p16) ld8 val1[0]=[src1],8);			\
+(EPI_1) shrp tmp=val1[PIPE_DEPTH-2],val1[PIPE_DEPTH-1],rshift;	\
+	EX(3f,(p16) ld8 val1[1]=[src1],8);			\
+(p16)	mov val1[0]=r0;						\
 	br.ctop.dptk 1b;					\
 	;;							\
 	br.cond.sptk.many .diff_align_do_tail;			\
 2:								\
 (EPI)	st8 [dst1]=tmp,8;					\
-(EPI_1)	shrp tmp=val1[PIPE_DEPTH-3],val1[PIPE_DEPTH-2],rshift;	\
+(EPI_1)	shrp tmp=val1[PIPE_DEPTH-2],val1[PIPE_DEPTH-1],rshift;	\
 3:								\
+(p16)	mov val1[1]=r0;						\
 (p16)	mov val1[0]=r0;						\
 	br.ctop.dptk 2b;					\
 	;;							\