iomap: Fix unsharing of an extent >2GB on a 32-bit machine

Widen the type used for counting the number of bytes unshared.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 89e21961d1adf9f7c6d4fe730e6a822b74c5b206..17ed7bb92c6c747ab40e9fe7288688699187bab4 100644 (file)
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -909,7 +909,7 @@ iomap_unshare_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
                struct iomap *iomap, struct iomap *srcmap)
 {
        long status = 0;
-       ssize_t written = 0;
+       loff_t written = 0;
 
        /* don't bother with blocks that are not shared to start with */
        if (!(iomap->flags & IOMAP_F_SHARED))