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| author |   Heiko Carstens <hca@linux.ibm.com> | 2021-06-09 22:59:13 +0200 |
|---|---|---|
| committer |   Vasily Gorbik <gor@linux.ibm.com> | 2021-06-18 16:41:22 +0200 |
| commit | dda74578e7da917fdf2e16608c1f8ad2e87c451f (patch) | |
| tree | 386de4357f3af7377828434879b85cde199798ce /arch/s390/mm/maccess.c | |
| parent | s390/checksum: use register pair instead of register asm (diff) | |
| download | wireguard-linux-dda74578e7da917fdf2e16608c1f8ad2e87c451f.tar.xz wireguard-linux-dda74578e7da917fdf2e16608c1f8ad2e87c451f.zip | |
s390/maccess: use register pair instead of register asm
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/mm/maccess.c')
| -rw-r--r-- | arch/s390/mm/maccess.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/arch/s390/mm/maccess.c b/arch/s390/mm/maccess.c index 1d17413b319a..1f1f906344ff 100644 --- a/arch/s390/mm/maccess.c +++ b/arch/s390/mm/maccess.c @@ -79,22 +79,21 @@ notrace void *s390_kernel_write(void *dst, const void *src, size_t size) static int __no_sanitize_address __memcpy_real(void *dest, void *src, size_t count) { - register unsigned long _dest asm("2") = (unsigned long) dest; - register unsigned long _len1 asm("3") = (unsigned long) count; - register unsigned long _src asm("4") = (unsigned long) src; - register unsigned long _len2 asm("5") = (unsigned long) count; + union register_pair _dst, _src; int rc = -EFAULT; + _dst.even = (unsigned long) dest; + _dst.odd = (unsigned long) count; + _src.even = (unsigned long) src; + _src.odd = (unsigned long) count; asm volatile ( - "0: mvcle %1,%2,0x0\n" + "0: mvcle %[dst],%[src],0\n" "1: jo 0b\n" - " lhi %0,0x0\n" + " lhi %[rc],0\n" "2:\n" EX_TABLE(1b,2b) - : "+d" (rc), "+d" (_dest), "+d" (_src), "+d" (_len1), - "+d" (_len2), "=m" (*((long *) dest)) - : "m" (*((long *) src)) - : "cc", "memory"); + : [rc] "+&d" (rc), [dst] "+&d" (_dst.pair), [src] "+&d" (_src.pair) + : : "cc", "memory"); return rc; } |