101 struct vm_map_entry {  struct
102 	struct vm_map_entry *prev;	/* previous entry */  argument
103 	struct vm_map_entry *next;	/* next entry */  argument
104 	struct vm_map_entry *left;	/* left child in binary search tree */  argument
105 	struct vm_map_entry *right;	/* right child in binary search tree */  argument
106 	vm_offset_t start;		/* start address */
107 	vm_offset_t end;		/* end address */
108 	vm_offset_t next_read;		/* vaddr of the next sequential read */
109 	vm_size_t pad_adj_free;		/* pad */
110 	vm_size_t max_free;		/* max free space in subtree */
111 	union vm_map_object object;	/* object I point to */
112 	vm_ooffset_t offset;		/* offset into object */
113 	vm_eflags_t eflags;		/* map entry flags */
114 	vm_prot_t protection;		/* protection code */
115 	vm_prot_t max_protection;	/* maximum protection */
116 	vm_inherit_t inheritance;	/* inheritance */
117 	uint8_t read_ahead;		/* pages in the read-ahead window */
118 	int wired_count;		/* can be paged if = 0 */
119 	struct ucred *cred;		/* tmp storage for creator ref */
120 	struct thread *wiring_thread;