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authorVasily Gorbik <gor@linux.ibm.com>2019-02-27 16:26:22 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2019-03-01 08:00:37 +0100
commit96d3b64b527f6dc8799ebf00a95e931554311daf (patch)
tree2aa03d22d9948add30b63b31cc50490d2e2fceb6 /arch
parentMerge tag 'vfio-ccw-20190227' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/vfio-ccw into features (diff)
downloadlinux-dev-96d3b64b527f6dc8799ebf00a95e931554311daf.tar.xz
linux-dev-96d3b64b527f6dc8799ebf00a95e931554311daf.zip
s390/als: remove duplicated in-place implementation of stfle
Reuse __stfle call instead of in-place implementation. __stfle is using memcpy and memset functions but they are safe to use, since mem.S is built with -march=z900. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/boot/als.c15
1 files changed, 1 insertions, 14 deletions
diff --git a/arch/s390/boot/als.c b/arch/s390/boot/als.c
index d592e0d90d9f..322e386bd9d0 100644
--- a/arch/s390/boot/als.c
+++ b/arch/s390/boot/als.c
@@ -105,20 +105,7 @@ void verify_facilities(void)
{
int i;
- for (i = 0; i < ARRAY_SIZE(S390_lowcore.stfle_fac_list); i++)
- S390_lowcore.stfle_fac_list[i] = 0;
- asm volatile(
- " stfl 0(0)\n"
- : "=m" (S390_lowcore.stfl_fac_list));
- S390_lowcore.stfle_fac_list[0] = (u64)S390_lowcore.stfl_fac_list << 32;
- if (S390_lowcore.stfl_fac_list & 0x01000000) {
- register unsigned long reg0 asm("0") = ARRAY_SIZE(als) - 1;
-
- asm volatile(".insn s,0xb2b00000,0(%1)" /* stfle */
- : "+d" (reg0)
- : "a" (&S390_lowcore.stfle_fac_list)
- : "memory", "cc");
- }
+ __stfle(S390_lowcore.stfle_fac_list, ARRAY_SIZE(S390_lowcore.stfle_fac_list));
for (i = 0; i < ARRAY_SIZE(als); i++) {
if ((S390_lowcore.stfle_fac_list[i] & als[i]) != als[i])
facility_mismatch();