[PATCH 04/15] iomap: warn on inline maps iomap_writepage_map

Christoph Hellwig
2019-07-01T21:55:21Z

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 <hch@lst.de>
---
fs/iomap.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/fs/iomap.c b/fs/iomap.c
index 0a86aaee961f..ea5b8e7c8903 100644
--- a/fs/iomap.c
+++ b/fs/iomap.c
@@ -2541,6 +2541,8 @@ 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,
--
2.20.1