diff options
Diffstat (limited to 'drivers/s390/cio/schid.h')
| -rw-r--r-- | drivers/s390/cio/schid.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/s390/cio/schid.h b/drivers/s390/cio/schid.h new file mode 100644 index 00000000000..54328fec5ad --- /dev/null +++ b/drivers/s390/cio/schid.h @@ -0,0 +1,26 @@ +#ifndef S390_SCHID_H +#define S390_SCHID_H + +struct subchannel_id { + __u32 reserved:13; + __u32 ssid:2; + __u32 one:1; + __u32 sch_no:16; +} __attribute__ ((packed,aligned(4))); + + +/* Helper function for sane state of pre-allocated subchannel_id. */ +static inline void +init_subchannel_id(struct subchannel_id *schid) +{ + memset(schid, 0, sizeof(struct subchannel_id)); + schid->one = 1; +} + +static inline int +schid_equal(struct subchannel_id *schid1, struct subchannel_id *schid2) +{ + return !memcmp(schid1, schid2, sizeof(struct subchannel_id)); +} + +#endif /* S390_SCHID_H */ |