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[S390] cleanup facility list handling

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Store the facility list once at system startup with stfl/stfle and
reuse the result for all facility tests.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2010-10-25 16:10:51 +02:00
committed by Martin Schwidefsky
parent eca577ef59
commit 14375bc4eb
12 changed files with 66 additions and 74 deletions
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5
arch/s390/kernel/topology.c
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@@ -351,13 +351,10 @@ static void alloc_masks(struct tl_info *info, struct mask_info *mask, int offset
void __init s390_init_cpu_topology(void)
{
unsigned long long facility_bits;
struct tl_info *info;
int i;
if (stfle(&facility_bits, 1) <= 0)
return;
if (!(facility_bits & (1ULL << 52)) || !(facility_bits & (1ULL << 61)))
if (!test_facility(2) || !test_facility(11))
return;
machine_has_topology = 1;