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s390/facilites: use stfle_fac_list array size for MAX_FACILITY_BIT

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commit 6f5165e864d240d15675cc2fb5a369d57e1f60d0 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Heiko Carstens 2017-03-20 14:29:50 +01:00 committed by Greg Kroah-Hartman
parent a801ff4d8e
commit bce133ab7d
1 changed files with 1 additions and 1 deletions
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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 void __set_facility(unsigned long nr, void *facilities)
{