[PATCH 10/11] vfs: allow generic_copy_file_range to copy across devices

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From: Dave Chinner <dchinner@xxxxxxxxxx>

do_splice_direct() can copy across superblocks without problems.
Remove the same superblock restriction on this fallback code.

Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
---
 fs/read_write.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/fs/read_write.c b/fs/read_write.c
index 4e0666de0d69..b0f231b10836 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1565,10 +1565,6 @@ ssize_t generic_copy_file_range(struct file *file_in, loff_t pos_in,
 			    struct file *file_out, loff_t pos_out,
 			    size_t len, unsigned int flags)
 {
-	/* Temporary, do_splice_direct supports cross-sb copies */
-	if (file_inode(file_in)->i_sb != file_inode(file_out)->i_sb)
-		return -EXDEV;
-
 	return do_splice_direct(file_in, &pos_in, file_out, &pos_out,
 			len > MAX_RW_COUNT ? MAX_RW_COUNT : len, 0);
 }
-- 
2.19.1




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