[IA64] __copy_user breaks on unaligned src

memcpy_mck.S::__copy_user breaks in the prefetch code under these conditions :- * src is unaligned and * dst is near the end of a page and * the page after dst is unmapped. Signed-off-by: Keith Owens <[email protected]> Signed-off-by: Tony Luck <[email protected]>
mrcsosa · Apr 25, 2005 · 6118ec8 · 6118ec8
1 parent f0a8d3c
commit 6118ec8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/arch/ia64/lib/memcpy_mck.S b/arch/ia64/lib/memcpy_mck.S
@@ -300,7 +300,7 @@ EK(.ex_handler,	(p[D])	st8 [dst1] = t15, 4*8)
 	add	src_pre_mem=0,src0	// prefetch src pointer
 	add	dst_pre_mem=0,dst0	// prefetch dest pointer
 	and	src0=-8,src0		// 1st src pointer
-(p7)	mov	ar.lc = r21
+(p7)	mov	ar.lc = cnt
 (p8)	mov	ar.lc = r0
 	;;
 	TEXT_ALIGN(32)