31 #define mrinit(mrp, name)	\  argument
32 	do { (mrp)->mr_writer = 0; init_rwsem(&(mrp)->mr_lock); } while (0)
34 #define mrinit(mrp, name)	\  argument
35 	do { init_rwsem(&(mrp)->mr_lock); } while (0)
38 #define mrlock_init(mrp, t,n,s)	mrinit(mrp, n)  argument
39 #define mrfree(mrp)		do { } while (0)  argument
41 static inline void mraccess_nested(mrlock_t *mrp, int subclass)  in mraccess_nested()  argument
43 	down_read_nested(&mrp->mr_lock, subclass);  in mraccess_nested()
46 static inline void mrupdate_nested(mrlock_t *mrp, int subclass)  in mrupdate_nested()  argument
48 	down_write_nested(&mrp->mr_lock, subclass);  in mrupdate_nested()
50 	mrp->mr_writer = 1;  in mrupdate_nested()
54 static inline int mrtryaccess(mrlock_t *mrp)  in mrtryaccess()  argument
56 	return down_read_trylock(&mrp->mr_lock);  in mrtryaccess()
59 static inline int mrtryupdate(mrlock_t *mrp)  in mrtryupdate()  argument
61 	if (!down_write_trylock(&mrp->mr_lock))  in mrtryupdate()
64 	mrp->mr_writer = 1;  in mrtryupdate()
69 static inline void mrunlock_excl(mrlock_t *mrp)  in mrunlock_excl()  argument
72 	mrp->mr_writer = 0;  in mrunlock_excl()
74 	up_write(&mrp->mr_lock);  in mrunlock_excl()
77 static inline void mrunlock_shared(mrlock_t *mrp)  in mrunlock_shared()  argument
79 	up_read(&mrp->mr_lock);  in mrunlock_shared()
82 static inline void mrdemote(mrlock_t *mrp)  in mrdemote()  argument
85 	mrp->mr_writer = 0;  in mrdemote()
87 	downgrade_write(&mrp->mr_lock);  in mrdemote()