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[13/14] iomap: Handle tail pages in iomap_page_mkwrite

Message ID 20201014030357.21898-14-willy@infradead.org (mailing list archive)
State New
Headers show
Series Transparent Huge Page support for XFS | expand

Commit Message

Matthew Wilcox (Oracle) Oct. 14, 2020, 3:03 a.m. UTC
iomap_page_mkwrite() can be called with a tail page.  If we are,
operate on the head page, since we're treating the entire thing as a
single unit and the whole page is dirtied at the same time.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
 fs/iomap/buffered-io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 38b6b75e7639..c2540c85f629 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -1098,7 +1098,7 @@  iomap_page_mkwrite_actor(struct inode *inode, loff_t pos, loff_t length,
 vm_fault_t iomap_page_mkwrite(struct vm_fault *vmf, const struct iomap_ops *ops)
-	struct page *page = vmf->page;
+	struct page *page = thp_head(vmf->page);
 	struct inode *inode = file_inode(vmf->vma->vm_file);
 	unsigned long length;
 	loff_t offset;