v4.19.13 snapshot.
diff --git a/fs/xfs/xfs_aops.h b/fs/xfs/xfs_aops.h
new file mode 100644
index 0000000..9af8679
--- /dev/null
+++ b/fs/xfs/xfs_aops.h
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2005-2006 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ */
+#ifndef __XFS_AOPS_H__
+#define __XFS_AOPS_H__
+
+extern struct bio_set xfs_ioend_bioset;
+
+/*
+ * Types of I/O for bmap clustering and I/O completion tracking.
+ */
+enum {
+ XFS_IO_INVALID, /* initial state */
+ XFS_IO_DELALLOC, /* covers delalloc region */
+ XFS_IO_UNWRITTEN, /* covers allocated but uninitialized data */
+ XFS_IO_OVERWRITE, /* covers already allocated extent */
+ XFS_IO_COW, /* covers copy-on-write extent */
+ XFS_IO_HOLE, /* covers region without any block allocation */
+};
+
+#define XFS_IO_TYPES \
+ { XFS_IO_INVALID, "invalid" }, \
+ { XFS_IO_DELALLOC, "delalloc" }, \
+ { XFS_IO_UNWRITTEN, "unwritten" }, \
+ { XFS_IO_OVERWRITE, "overwrite" }, \
+ { XFS_IO_COW, "CoW" }, \
+ { XFS_IO_HOLE, "hole" }
+
+/*
+ * Structure for buffered I/O completions.
+ */
+struct xfs_ioend {
+ struct list_head io_list; /* next ioend in chain */
+ unsigned int io_type; /* delalloc / unwritten */
+ struct inode *io_inode; /* file being written to */
+ size_t io_size; /* size of the extent */
+ xfs_off_t io_offset; /* offset in the file */
+ struct work_struct io_work; /* xfsdatad work queue */
+ struct xfs_trans *io_append_trans;/* xact. for size update */
+ struct bio *io_bio; /* bio being built */
+ struct bio io_inline_bio; /* MUST BE LAST! */
+};
+
+extern const struct address_space_operations xfs_address_space_operations;
+extern const struct address_space_operations xfs_dax_aops;
+
+int xfs_setfilesize(struct xfs_inode *ip, xfs_off_t offset, size_t size);
+
+extern void xfs_count_page_state(struct page *, int *, int *);
+extern struct block_device *xfs_find_bdev_for_inode(struct inode *);
+extern struct dax_device *xfs_find_daxdev_for_inode(struct inode *);
+
+#endif /* __XFS_AOPS_H__ */