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| author |   Michael Mueller <mimu@linux.vnet.ibm.com> | 2013-06-20 15:11:39 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-06-26 21:10:25 +0200 |
| commit | 32089246e36dffbadba66fc94a246678fccfd5a2 (patch) | |
| tree | f5533dc03ff02868437d60bd32577f1a4e33f08a /arch/s390/include/asm/facility.h | |
| parent | s390/sclp: remove duplicated include from sclp_ctl.c (diff) | |
| download | linux-dev-32089246e36dffbadba66fc94a246678fccfd5a2.tar.xz linux-dev-32089246e36dffbadba66fc94a246678fccfd5a2.zip | |
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>
Diffstat (limited to 'arch/s390/include/asm/facility.h')
| -rw-r--r-- | arch/s390/include/asm/facility.h | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/arch/s390/include/asm/facility.h b/arch/s390/include/asm/facility.h index 2ee66a65f2d4..0aa6a7ed95a3 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); } /** |