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s390/facilites: use stfle_fac_list array size for MAX_FACILITY_BIT

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Use the actual size of the facility list array within the lowcore
structure for the MAX_FACILITY_BIT define instead of a comment which
states what this is good for. This makes it a bit harder to break
things.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2017-03-20 14:29:50 +01:00 committed by Martin Schwidefsky
parent cdd3bd9d61
commit 6f5165e864
1 changed files with 1 additions and 1 deletions
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2
arch/s390/include/asm/facility.h
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@ -15,7 +15,7 @@
#include <linux/preempt.h>
#include <asm/lowcore.h>
#define MAX_FACILITY_BIT (256*8) /* stfle_fac_list has 256 bytes */
#define MAX_FACILITY_BIT (sizeof(((struct lowcore *)0)->stfle_fac_list) * 8)
static inline int __test_facility(unsigned long nr, void *facilities)
{