[RFC PATCH v4 8/8] fs: remove bdev_try_to_free_page callback
From: Zhang Yi <yi.zhang@huawei.com>
Date: 2021-06-10 11:16:03
Also in:
linux-fsdevel
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
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: Zhang Yi <yi.zhang@huawei.com> Reviewed-by: Jan Kara <jack@suse.cz> --- fs/block_dev.c | 15 --------------- include/linux/fs.h | 1 - 2 files changed, 16 deletions(-)
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 6cc4d4cfe0c2..e215da6d49b4 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c@@ -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,
diff --git a/include/linux/fs.h b/include/linux/fs.h
index c3c88fdb9b2a..c3277b445f96 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h@@ -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 *,
--
2.31.1