arch/s390/include/asm/schid.h

   1 #ifndef ASM_SCHID_H
   2 #define ASM_SCHID_H
   3
   4 #include <linux/types.h>
   5
   6 struct subchannel_id {
   7         __u32 cssid : 8;
   8         __u32 : 4;
   9         __u32 m : 1;
  10         __u32 ssid : 2;
  11         __u32 one : 1;
  12         __u32 sch_no : 16;
  13 } __attribute__ ((packed, aligned(4)));
  14
  15 #ifdef __KERNEL__
  16 #include <linux/string.h>
  17
  18 /* Helper function for sane state of pre-allocated subchannel_id. */
  19 static inline void
  20 init_subchannel_id(struct subchannel_id *schid)
  21 {
  22         memset(schid, 0, sizeof(struct subchannel_id));
  23         schid->one = 1;
  24 }
  25
  26 static inline int
  27 schid_equal(struct subchannel_id *schid1, struct subchannel_id *schid2)
  28 {
  29         return !memcmp(schid1, schid2, sizeof(struct subchannel_id));
  30 }
  31
  32 #endif /* __KERNEL__ */
  33
  34 #endif /* ASM_SCHID_H */