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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2007-07-10 11:24:10 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-07-10 11:24:43 +0200 |
| commit | 83119ad4a1ceacd99f380086c2855ae2c4268afc (patch) | |
| tree | 6da1d5cdba6e5bcd8fcdf5332700e8353b4e79a8 /drivers/s390/char/sclp.h | |
| parent | [S390] sclp: introduce some new interfaces. (diff) | |
| download | linux-83119ad4a1ceacd99f380086c2855ae2c4268afc.tar.xz linux-83119ad4a1ceacd99f380086c2855ae2c4268afc.zip | |
[S390] sclp: Test facility list before executing a service call.
Check if a command is available before executing. Saves some
superfluous service calls that won't succeed anyway.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char/sclp.h')
| -rw-r--r-- | drivers/s390/char/sclp.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h index cb5888f79007..c7318a125852 100644 --- a/drivers/s390/char/sclp.h +++ b/drivers/s390/char/sclp.h @@ -79,6 +79,11 @@ struct sccb_header { u16 response_code; } __attribute__((packed)); +extern u64 sclp_facilities; + +#define SCLP_HAS_CHP_INFO (sclp_facilities & 0x8000000000000000ULL) +#define SCLP_HAS_CHP_RECONFIG (sclp_facilities & 0x2000000000000000ULL) + struct gds_subvector { u8 length; u8 key; |