From 3e19e6f3eeea26490a84cdd18c7220e640f4837e Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 17 Oct 2019 13:12:17 -0700 Subject: [PATCH] iomap: warn on inline maps in iomap_writepage_map And inline mapping should never mark the page dirty and thus never end up in writepages. Add a check for that condition and warn if it happens. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- fs/iomap/buffered-io.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 41e1828a0bb3..901c1a799238 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -1415,6 +1415,8 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc, error = wpc->ops->map_blocks(wpc, inode, file_offset); if (error) break; + if (WARN_ON_ONCE(wpc->iomap.type == IOMAP_INLINE)) + continue; if (wpc->iomap.type == IOMAP_HOLE) continue; iomap_add_to_ioend(inode, file_offset, page, iop, wpc, wbc,