diff options
Diffstat (limited to 'include/asm-s390/schid.h')
| -rw-r--r-- | include/asm-s390/schid.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/asm-s390/schid.h b/include/asm-s390/schid.h new file mode 100644 index 000000000000..7bdc0fe15691 --- /dev/null +++ b/include/asm-s390/schid.h @@ -0,0 +1,31 @@ +#ifndef ASM_SCHID_H +#define ASM_SCHID_H + +struct subchannel_id { + __u32 cssid : 8; + __u32 : 4; + __u32 m : 1; + __u32 ssid : 2; + __u32 one : 1; + __u32 sch_no : 16; +} __attribute__ ((packed, aligned(4))); + +#ifdef __KERNEL__ + +/* 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 /* __KERNEL__ */ + +#endif /* ASM_SCHID_H */ |