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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 16:41:21 +0200 |
| commit | ddd38fd261e7cd7772caea0128d0bee65bf1b159 (patch) | |
| tree | eaefff3db2d607923b49f23713addabe51f47dbb | |
| parent | 4f38c7aefed3c5c4e0d57837ad4c81cfad05df50 (diff) | |
| download | linux-ddd38fd261e7cd7772caea0128d0bee65bf1b159.tar.gz linux-ddd38fd261e7cd7772caea0128d0bee65bf1b159.tar.bz2 linux-ddd38fd261e7cd7772caea0128d0bee65bf1b159.zip | |
s390/smp: 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>
| -rw-r--r-- | arch/s390/kernel/smp.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index e137c840a4d3..c8493e7205ce 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -1233,21 +1233,21 @@ subsys_initcall(s390_smp_init); static __always_inline void set_new_lowcore(struct lowcore *lc) { - struct lowcore *old_lc = &S390_lowcore; - struct lowcore *new_lc = lc; + union register_pair dst, src; u32 pfx; - register struct lowcore *reg2 asm ("2") = new_lc; - register unsigned long reg3 asm ("3") = sizeof(*reg2); - register struct lowcore *reg4 asm ("4") = old_lc; - register unsigned long reg5 asm ("5") = sizeof(*reg4); + + src.even = (unsigned long) &S390_lowcore; + src.odd = sizeof(S390_lowcore); + dst.even = (unsigned long) lc; + dst.odd = sizeof(*lc); + pfx = (unsigned long) lc; asm volatile( - " st 2,%[pfx]\n" - " mvcl 2,4\n" + " mvcl %[dst],%[src]\n" " spx %[pfx]\n" - : "+&d" (reg2), "+&d" (reg3), - "+&d" (reg4), "+&d" (reg5), [pfx] "=Q" (pfx) - : : "memory", "cc"); + : [dst] "+&d" (dst.pair), [src] "+&d" (src.pair) + : [pfx] "Q" (pfx) + : "memory", "cc"); } static int __init smp_reinit_ipl_cpu(void) |