Commit acc6100d authored by Zhang Yi's avatar Zhang Yi Committed by Theodore Ts'o
Browse files

fs: remove bdev_try_to_free_page callback 



After remove the unique user of sop->bdev_try_to_free_page() callback,
we could remove the callback and the corresponding blkdev_releasepage()
at all.

Signed-off-by: default avatarZhang Yi <yi.zhang@huawei.com>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210610112440.3438139-9-yi.zhang@huawei.com


Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent 3b672e3a

fs/block_dev.c

+0 −15
Original line number Diff line number Diff line
@@ -1733,20 +1733,6 @@ ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to) 
}

EXPORT_SYMBOL_GPL(blkdev_read_iter);



/*

 * Try to release a page associated with block device when the system

 * is under memory pressure.

 */

static int blkdev_releasepage(struct page *page, gfp_t wait)

{

	struct super_block *super = BDEV_I(page->mapping->host)->bdev.bd_super;



	if (super && super->s_op->bdev_try_to_free_page)

		return super->s_op->bdev_try_to_free_page(super, page, wait);



	return try_to_free_buffers(page);

}



static int blkdev_writepages(struct address_space *mapping,

			     struct writeback_control *wbc)

{
@@ -1760,7 +1746,6 @@ static const struct address_space_operations def_blk_aops = { 
	.write_begin	= blkdev_write_begin,

	.write_end	= blkdev_write_end,

	.writepages	= blkdev_writepages,

	.releasepage	= blkdev_releasepage,

	.direct_IO	= blkdev_direct_IO,

	.migratepage	= buffer_migrate_page_norefs,

	.is_dirty_writeback = buffer_check_dirty_writeback,

include/linux/fs.h

+0 −1
Original line number Diff line number Diff line
@@ -2171,7 +2171,6 @@ struct super_operations { 
	ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);

	struct dquot **(*get_dquots)(struct inode *);

#endif

	int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t);

	long (*nr_cached_objects)(struct super_block *,

				  struct shrink_control *);

	long (*free_cached_objects)(struct super_block *,