From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx> Assert that we're not seeing large pages in functions that read/write inline data, rather than zeroing out the tail. Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> --- 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 709be90a1997..e489b8769fcb 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -221,6 +221,7 @@ 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); @@ -732,6 +733,7 @@ iomap_write_end_inline(struct inode *inode, struct page *page, void *addr; 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); -- 2.26.2
