[PATCH 4/5] buffer: Cast block to loff_t before shifting it

["Matthew Wilcox (Oracle)" <willy@infradead.org>]

While sector_t is always defined as a u64 today, that hasn't always been
the case and it might not always be the same size as loff_t in the future.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 fs/buffer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/buffer.c b/fs/buffer.c
index c83bb89b2e24..2f08af3c47a2 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2008,7 +2008,7 @@ static int
 iomap_to_bh(struct inode *inode, sector_t block, struct buffer_head *bh,
 		const struct iomap *iomap)
 {
-	loff_t offset = block << inode->i_blkbits;
+	loff_t offset = (loff_t)block << inode->i_blkbits;
 
 	bh->b_bdev = iomap->bdev;
 
-- 
2.42.0