Commit 75c89a2b authored by Heiko Carstens's avatar Heiko Carstens Committed by Vasily Gorbik
Browse files

s390/page: use register pair instead of register asm 



Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
parent ddd38fd2

arch/s390/include/asm/page.h

+9 −6
Original line number Diff line number Diff line
@@ -55,13 +55,16 @@ static inline void storage_key_init_range(unsigned long start, unsigned long end 
 */

static inline void copy_page(void *to, void *from)

{

	register void *reg2 asm ("2") = to;

	register unsigned long reg3 asm ("3") = 0x1000;

	register void *reg4 asm ("4") = from;

	register unsigned long reg5 asm ("5") = 0xb0001000;

	union register_pair dst, src;



	dst.even = (unsigned long) to;

	dst.odd  = 0x1000;

	src.even = (unsigned long) from;

	src.odd  = 0xb0001000;



	asm volatile(

		"	mvcl	2,4"

		: "+d" (reg2), "+d" (reg3), "+d" (reg4), "+d" (reg5)

		"	mvcl	%[dst],%[src]"

		: [dst] "+&d" (dst.pair), [src] "+&d" (src.pair)

		: : "memory", "cc");

}