No need to implement it for read-only mappings.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
fs/iomap.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
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;
}
--
2.1.4
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