Structs starting with `u' in sys

• ucred sys/ucred.h:42
• uio sys/uio.h:58
• umask_args sys/syscallargs.h:268
• undelete_args sys/syscallargs.h:836
• unlink_args sys/syscallargs.h:53
• unmount_args sys/syscallargs.h:105
• unpcb sys/unpcb.h:61
• uprof sys/resourcevar.h:52
• utimes_args sys/syscallargs.h:630
• utsname sys/utsname.h:42