49 typedef void (bh_end_io_t)(struct buffer_head *bh, int uptodate);
88 static __always_inline void set_buffer_##name(struct buffer_head *bh)	\
90 	if (!test_bit(BH_##bit, &(bh)->b_state))			\
91 		set_bit(BH_##bit, &(bh)->b_state);			\
93 static __always_inline void clear_buffer_##name(struct buffer_head *bh)	\
95 	clear_bit(BH_##bit, &(bh)->b_state);				\
97 static __always_inline int buffer_##name(const struct buffer_head *bh)	\
99 	return test_bit(BH_##bit, &(bh)->b_state);			\
106 static __always_inline int test_set_buffer_##name(struct buffer_head *bh) \
108 	return test_and_set_bit(BH_##bit, &(bh)->b_state);		\
110 static __always_inline int test_clear_buffer_##name(struct buffer_head *bh) \
112 	return test_and_clear_bit(BH_##bit, &(bh)->b_state);		\
137 static __always_inline void set_buffer_uptodate(struct buffer_head *bh)  in BUFFER_FNS()
147 	if (test_bit(BH_Uptodate, &bh->b_state))  in BUFFER_FNS()
155 	set_bit(BH_Uptodate, &bh->b_state);  in BUFFER_FNS()
158 static __always_inline void clear_buffer_uptodate(struct buffer_head *bh)  in clear_buffer_uptodate()  argument
160 	clear_bit(BH_Uptodate, &bh->b_state);  in clear_buffer_uptodate()
163 static __always_inline int buffer_uptodate(const struct buffer_head *bh)  in buffer_uptodate()  argument
169 	return (smp_load_acquire(&bh->b_state) & (1UL << BH_Uptodate)) != 0;  in buffer_uptodate()
172 #define bh_offset(bh)		((unsigned long)(bh)->b_data & ~PAGE_MASK)  argument
189 void mark_buffer_dirty(struct buffer_head *bh);
190 void mark_buffer_write_io_error(struct buffer_head *bh);
191 void touch_buffer(struct buffer_head *bh);
192 void set_bh_page(struct buffer_head *bh,
199 void end_buffer_read_sync(struct buffer_head *bh, int uptodate);
200 void end_buffer_write_sync(struct buffer_head *bh, int uptodate);
201 void end_buffer_async_write(struct buffer_head *bh, int uptodate);
204 void mark_buffer_dirty_inode(struct buffer_head *bh, struct inode *inode);
211 static inline void clean_bdev_bh_alias(struct buffer_head *bh)  in clean_bdev_bh_alias()  argument
213 	clean_bdev_aliases(bh->b_bdev, bh->b_blocknr, 1);  in clean_bdev_bh_alias()
216 void mark_buffer_async_write(struct buffer_head *bh);
218 wait_queue_head_t *bh_waitq_head(struct buffer_head *bh);
234 void free_buffer_head(struct buffer_head * bh);
235 void unlock_buffer(struct buffer_head *bh);
236 void __lock_buffer(struct buffer_head *bh);
237 void ll_rw_block(int, int, int, struct buffer_head * bh[]);
238 int sync_dirty_buffer(struct buffer_head *bh);
239 int __sync_dirty_buffer(struct buffer_head *bh, int op_flags);
240 void write_dirty_buffer(struct buffer_head *bh, int op_flags);
244 int bh_uptodate_or_lock(struct buffer_head *bh);
245 int bh_submit_read(struct buffer_head *bh);
311 static inline void get_bh(struct buffer_head *bh)  in get_bh()  argument
313         atomic_inc(&bh->b_count);  in get_bh()
316 static inline void put_bh(struct buffer_head *bh)  in put_bh()  argument
319         atomic_dec(&bh->b_count);  in put_bh()
322 static inline void brelse(struct buffer_head *bh)  in brelse()  argument
324 	if (bh)  in brelse()
325 		__brelse(bh);  in brelse()
328 static inline void bforget(struct buffer_head *bh)  in bforget()  argument
330 	if (bh)  in bforget()
331 		__bforget(bh);  in bforget()
378 map_bh(struct buffer_head *bh, struct super_block *sb, sector_t block)  in map_bh()  argument
380 	set_buffer_mapped(bh);  in map_bh()
381 	bh->b_bdev = sb->s_bdev;  in map_bh()
382 	bh->b_blocknr = block;  in map_bh()
383 	bh->b_size = sb->s_blocksize;  in map_bh()
386 static inline void wait_on_buffer(struct buffer_head *bh)  in wait_on_buffer()  argument
389 	if (buffer_locked(bh))  in wait_on_buffer()
390 		__wait_on_buffer(bh);  in wait_on_buffer()
393 static inline int trylock_buffer(struct buffer_head *bh)  in trylock_buffer()  argument
395 	return likely(!test_and_set_bit_lock(BH_Lock, &bh->b_state));  in trylock_buffer()
398 static inline void lock_buffer(struct buffer_head *bh)  in lock_buffer()  argument
401 	if (!trylock_buffer(bh))  in lock_buffer()
402 		__lock_buffer(bh);  in lock_buffer()