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Commit ce98321b authored by Jan Kara's avatar Jan Kara Committed by Jens Axboe
Browse files

fs: Remove unmap_underlying_metadata 



Nobody is using this function anymore. Remove it.

Signed-off-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent e64855c6

fs/buffer.c

+0 −32
Original line number Diff line number Diff line
@@ -1605,38 +1605,6 @@ void create_empty_buffers(struct page *page, 
}

EXPORT_SYMBOL(create_empty_buffers);



/*

 * We are taking a block for data and we don't want any output from any

 * buffer-cache aliases starting from return from that function and

 * until the moment when something will explicitly mark the buffer

 * dirty (hopefully that will not happen until we will free that block ;-)

 * We don't even need to mark it not-uptodate - nobody can expect

 * anything from a newly allocated buffer anyway. We used to used

 * unmap_buffer() for such invalidation, but that was wrong. We definitely

 * don't want to mark the alias unmapped, for example - it would confuse

 * anyone who might pick it with bread() afterwards...

 *

 * Also..  Note that bforget() doesn't lock the buffer.  So there can

 * be writeout I/O going on against recently-freed buffers.  We don't

 * wait on that I/O in bforget() - it's more efficient to wait on the I/O

 * only if we really need to.  That happens here.

 */

void unmap_underlying_metadata(struct block_device *bdev, sector_t block)

{

	struct buffer_head *old_bh;



	might_sleep();



	old_bh = __find_get_block_slow(bdev, block);

	if (old_bh) {

		clear_buffer_dirty(old_bh);

		wait_on_buffer(old_bh);

		clear_buffer_req(old_bh);

		__brelse(old_bh);

	}

}

EXPORT_SYMBOL(unmap_underlying_metadata);



/**

 * clean_bdev_aliases: clean a range of buffers in block device

 * @bdev: Block device to clean buffers in

include/linux/buffer_head.h

+0 −1
Original line number Diff line number Diff line
@@ -168,7 +168,6 @@ int inode_has_buffers(struct inode *); 
void invalidate_inode_buffers(struct inode *);

int remove_inode_buffers(struct inode *inode);

int sync_mapping_buffers(struct address_space *mapping);

void unmap_underlying_metadata(struct block_device *bdev, sector_t block);

void clean_bdev_aliases(struct block_device *bdev, sector_t block,

			sector_t len);

static inline void clean_bdev_bh_alias(struct buffer_head *bh)