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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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6
arch/s390/kernel/vdso.c
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@@ -84,11 +84,7 @@ struct vdso_data *vdso_data = &vdso_data_store.data;
*/
static void vdso_init_data(struct vdso_data *vd)
{
unsigned int facility_list;
facility_list = stfl();
vd->ectg_available =
user_mode != HOME_SPACE_MODE && (facility_list & 1);
vd->ectg_available = user_mode != HOME_SPACE_MODE && test_facility(31);
}
#ifdef CONFIG_64BIT