[PATCH v5 5/9] vfs: Copy shouldn't forbid ranges inside the same file

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

This is perfectly valid for BTRFS and XFS, so let's leave this up to
filesystems to check.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/read_write.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/fs/read_write.c b/fs/read_write.c
index f3d6c48..8e7cb33 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1371,10 +1371,6 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,
 	    file_in->f_path.mnt != file_out->f_path.mnt)
 		return -EXDEV;
 
-	/* forbid ranges in the same file */
-	if (inode_in == inode_out)
-		return -EINVAL;
-
 	if (len == 0)
 		return 0;
 
-- 
2.6.0