[PATCH v3 7/9] vfs: Remove copy_file_range mountpoint checks

[Anna Schumaker <Anna.Schumaker@netapp.com>]

I still want to do an in-kernel copy even if the files are on different
mountpoints, and NFS has a "server to server" copy that expects two
files on different mountpoints.  Let's have individual filesystems
implement this check instead.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Reviewed-by: David Sterba <dsterba@suse.com>
---
 fs/read_write.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/fs/read_write.c b/fs/read_write.c
index 6f74f1f..ee9fa37 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1366,11 +1366,6 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,
 	    pos_in + len > i_size_read(inode_in))
 		return -EINVAL;
 
-	/* this could be relaxed once a method supports cross-fs copies */
-	if (inode_in->i_sb != inode_out->i_sb ||
-	    file_in->f_path.mnt != file_out->f_path.mnt)
-		return -EXDEV;
-
 	if (len == 0)
 		return 0;
 
-- 
2.5.3