From b82a96c9253333a8834b2df5f262a39cccf4f6c7 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Mon, 28 Jun 2021 19:36:27 -0700 Subject: fs: remove noop_set_page_dirty() Use __set_page_dirty_no_writeback() instead. This will set the dirty bit on the page, which will be used to avoid calling set_page_dirty() in the future. It will have no effect on actually writing the page back, as the pages are not on any LRU lists. [akpm@linux-foundation.org: export __set_page_dirty_no_writeback() to modules] Link: https://lkml.kernel.org/r/20210615162342.1669332-6-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Cc: Al Viro Cc: Christoph Hellwig Cc: Dan Williams Cc: Greg Kroah-Hartman Cc: Jan Kara Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/ext2/inode.c | 2 +- fs/ext4/inode.c | 2 +- fs/fuse/dax.c | 2 +- fs/libfs.c | 16 ---------------- fs/xfs/xfs_aops.c | 2 +- 5 files changed, 4 insertions(+), 20 deletions(-) (limited to 'fs') diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index bf41f579ed3e..dadb121beb22 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -992,7 +992,7 @@ const struct address_space_operations ext2_nobh_aops = { static const struct address_space_operations ext2_dax_aops = { .writepages = ext2_dax_writepages, .direct_IO = noop_direct_IO, - .set_page_dirty = noop_set_page_dirty, + .set_page_dirty = __set_page_dirty_no_writeback, .invalidatepage = noop_invalidatepage, }; diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index fe6045a46599..b8170a008590 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3701,7 +3701,7 @@ static const struct address_space_operations ext4_da_aops = { static const struct address_space_operations ext4_dax_aops = { .writepages = ext4_dax_writepages, .direct_IO = noop_direct_IO, - .set_page_dirty = noop_set_page_dirty, + .set_page_dirty = __set_page_dirty_no_writeback, .bmap = ext4_bmap, .invalidatepage = noop_invalidatepage, .swap_activate = ext4_iomap_swap_activate, diff --git a/fs/fuse/dax.c b/fs/fuse/dax.c index ff99ab2a3c43..515ad0895345 100644 --- a/fs/fuse/dax.c +++ b/fs/fuse/dax.c @@ -1329,7 +1329,7 @@ bool fuse_dax_inode_alloc(struct super_block *sb, struct fuse_inode *fi) static const struct address_space_operations fuse_dax_file_aops = { .writepages = fuse_dax_writepages, .direct_IO = noop_direct_IO, - .set_page_dirty = noop_set_page_dirty, + .set_page_dirty = __set_page_dirty_no_writeback, .invalidatepage = noop_invalidatepage, }; diff --git a/fs/libfs.c b/fs/libfs.c index 3fdd89b156d6..51b4de3b3447 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -1171,22 +1171,6 @@ int noop_fsync(struct file *file, loff_t start, loff_t end, int datasync) } EXPORT_SYMBOL(noop_fsync); -int noop_set_page_dirty(struct page *page) -{ - /* - * Unlike __set_page_dirty_no_writeback that handles dirty page - * tracking in the page object, dax does all dirty tracking in - * the inode address_space in response to mkwrite faults. In the - * dax case we only need to worry about potentially dirty CPU - * caches, not dirty page cache pages to write back. - * - * This callback is defined to prevent fallback to - * __set_page_dirty_buffers() in set_page_dirty(). - */ - return 0; -} -EXPORT_SYMBOL_GPL(noop_set_page_dirty); - void noop_invalidatepage(struct page *page, unsigned int offset, unsigned int length) { diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index a335d79dcff8..cb4e0fcf4c76 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -575,7 +575,7 @@ const struct address_space_operations xfs_address_space_operations = { const struct address_space_operations xfs_dax_aops = { .writepages = xfs_dax_writepages, .direct_IO = noop_direct_IO, - .set_page_dirty = noop_set_page_dirty, + .set_page_dirty = __set_page_dirty_no_writeback, .invalidatepage = noop_invalidatepage, .swap_activate = xfs_iomap_swapfile_activate, }; -- cgit