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Subject[PATCH 10/11] iomap: Inline data shouldn't see THPs
Date
Assert that we're not seeing THPs in functions that read/write
inline data, rather than zeroing out the tail.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
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 52d371c59758..ca2aa1995519 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -210,6 +210,7 @@ iomap_read_inline_data(struct inode *inode, struct page *page,
return;

BUG_ON(page->index);
+ BUG_ON(PageCompound(page));
BUG_ON(size > PAGE_SIZE - offset_in_page(iomap->inline_data));

addr = kmap_atomic(page);
@@ -727,6 +728,7 @@ static size_t iomap_write_end_inline(struct inode *inode, struct page *page,

flush_dcache_page(page);
WARN_ON_ONCE(!PageUptodate(page));
+ BUG_ON(PageCompound(page));
BUG_ON(pos + copied > PAGE_SIZE - offset_in_page(iomap->inline_data));

addr = kmap_atomic(page);
--
2.28.0
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