And use it instead of opencoding in btrfs, f2fs and in fuse (coming up).

Signed-off-by: Miklos Szeredi <redacted>
Cc: Chris Mason <clm@fb.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/btrfs/ctree.h    |  1 -
 fs/btrfs/inode.c    | 15 ---------------
 fs/btrfs/tree-log.c |  4 ++--
 fs/f2fs/node.c      |  7 ++-----
 include/linux/fs.h  |  1 +
 mm/filemap.c        |  3 ++-
 6 files changed, 7 insertions(+), 24 deletions(-)

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 4274a7bfdaed..425834193259 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h

@@ -3129,7 +3129,6 @@ int btrfs_prealloc_file_range_trans(struct inode *inode,
 				    struct btrfs_trans_handle *trans, int mode,
 				    u64 start, u64 num_bytes, u64 min_size,
 				    loff_t actual_len, u64 *alloc_hint);
-int btrfs_inode_check_errors(struct inode *inode);
 extern const struct dentry_operations btrfs_dentry_operations;
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
 void btrfs_test_inode_set_ops(struct inode *inode);

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 4421954720b8..b22841625333 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c

@@ -10489,21 +10489,6 @@ out_inode:
 
 }
 
-/* Inspired by filemap_check_errors() */
-int btrfs_inode_check_errors(struct inode *inode)
-{
-	int ret = 0;
-
-	if (test_bit(AS_ENOSPC, &inode->i_mapping->flags) &&
-	    test_and_clear_bit(AS_ENOSPC, &inode->i_mapping->flags))
-		ret = -ENOSPC;
-	if (test_bit(AS_EIO, &inode->i_mapping->flags) &&
-	    test_and_clear_bit(AS_EIO, &inode->i_mapping->flags))
-		ret = -EIO;
-
-	return ret;
-}
-
 static const struct inode_operations btrfs_dir_inode_operations = {
 	.getattr	= btrfs_getattr,
 	.lookup		= btrfs_lookup,

diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index c05f69a8ec42..3c29b9357392 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c

@@ -3944,7 +3944,7 @@ static int wait_ordered_extents(struct btrfs_trans_handle *trans,
 			 * i_mapping flags, so that the next fsync won't get
 			 * an outdated io error too.
 			 */
-			btrfs_inode_check_errors(inode);
+			filemap_check_errors(inode->i_mapping);
 			*ordered_io_error = true;
 			break;
 		}

@@ -4181,7 +4181,7 @@ static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans,
 	 * without writing to the log tree and the fsync must report the
 	 * file data write error and not commit the current transaction.
 	 */
-	ret = btrfs_inode_check_errors(inode);
+	ret = filemap_check_errors(inode->i_mapping);
 	if (ret)
 		ctx->io_err = ret;
 process: