diff mbox

[5/7] iomap: mark ->iomap_end as optional

Message ID 1471131781-14107-6-git-send-email-hch@lst.de (mailing list archive)
State Accepted
Headers show

Commit Message

Christoph Hellwig Aug. 13, 2016, 11:42 p.m. UTC 
No need to implement it for read-only mappings.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/iomap.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
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Patch

diff --git a/fs/iomap.c b/fs/iomap.c
index d9d1f50..0342254 100644
--- a/fs/iomap.c
+++ b/fs/iomap.c
@@ -84,8 +84,11 @@  iomap_apply(struct inode *inode, loff_t pos, loff_t length, unsigned flags,
 	 * Now the data has been copied, commit the range we've copied.  This
 	 * should not fail unless the filesystem has had a fatal error.
 	 */
-	ret = ops->iomap_end(inode, pos, length, written > 0 ? written : 0,
-			flags, &iomap);
+	if (ops->iomap_end) {
+		ret = ops->iomap_end(inode, pos, length,
+				     written > 0 ? written : 0,
+				     flags, &iomap);
+	}
 
 	return written ? written : ret;
 }