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authorMichael Mueller <mimu@linux.vnet.ibm.com>2013-06-20 15:11:39 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-06-26 21:10:25 +0200
commit32089246e36dffbadba66fc94a246678fccfd5a2 (patch)
treef5533dc03ff02868437d60bd32577f1a4e33f08a
parent749d3f9c8179a26f87a1427e95229fc94ef40cc1 (diff)
downloadop-kernel-dev-32089246e36dffbadba66fc94a246678fccfd5a2.zip
op-kernel-dev-32089246e36dffbadba66fc94a246678fccfd5a2.tar.gz
s390/facility: decompose test_facility()
The patch decomposes the function test_facility() into its API test_facility() and its implementation __test_facility(). This allows to reuse the implementation with a different API. Patch is used to prepare checkin of SIE satellite code. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--arch/s390/include/asm/facility.h17
1 files changed, 11 insertions, 6 deletions
diff --git a/arch/s390/include/asm/facility.h b/arch/s390/include/asm/facility.h
index 2ee66a6..0aa6a7e 100644
--- a/arch/s390/include/asm/facility.h
+++ b/arch/s390/include/asm/facility.h
@@ -13,6 +13,16 @@
#define MAX_FACILITY_BIT (256*8) /* stfle_fac_list has 256 bytes */
+static inline int __test_facility(unsigned long nr, void *facilities)
+{
+ unsigned char *ptr;
+
+ if (nr >= MAX_FACILITY_BIT)
+ return 0;
+ ptr = (unsigned char *) facilities + (nr >> 3);
+ return (*ptr & (0x80 >> (nr & 7))) != 0;
+}
+
/*
* The test_facility function uses the bit odering where the MSB is bit 0.
* That makes it easier to query facility bits with the bit number as
@@ -20,12 +30,7 @@
*/
static inline int test_facility(unsigned long nr)
{
- unsigned char *ptr;
-
- if (nr >= MAX_FACILITY_BIT)
- return 0;
- ptr = (unsigned char *) &S390_lowcore.stfle_fac_list + (nr >> 3);
- return (*ptr & (0x80 >> (nr & 7))) != 0;
+ return __test_facility(nr, &S390_lowcore.stfle_fac_list);
}
/**
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