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s390/page: use register pair instead of register asm

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Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens
2021-06-09 22:59:13 +02:00
committed by Vasily Gorbik
parent ddd38fd261
commit 75c89a2bc6
1 changed files with 9 additions and 6 deletions
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15
arch/s390/include/asm/page.h
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@@ -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) static inline void copy_page(void *to, void *from)
{ {
register void *reg2 asm ("2") = to; union register_pair dst, src;
register unsigned long reg3 asm ("3") = 0x1000;
register void *reg4 asm ("4") = from; dst.even = (unsigned long) to;
register unsigned long reg5 asm ("5") = 0xb0001000; dst.odd = 0x1000;
src.even = (unsigned long) from;
src.odd = 0xb0001000;
asm volatile( asm volatile(
" mvcl 2,4" " mvcl %[dst],%[src]"
: "+d" (reg2), "+d" (reg3), "+d" (reg4), "+d" (reg5) : [dst] "+&d" (dst.pair), [src] "+&d" (src.pair)
: : "memory", "cc"); : : "memory", "cc");
} }