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Message-Id: <20200529025824.32296-34-willy@infradead.org>
Date: Thu, 28 May 2020 19:58:18 -0700
From: Matthew Wilcox <willy@...radead.org>
To: linux-fsdevel@...r.kernel.org
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [PATCH v5 33/39] mm: Support tail pages in wait_for_stable_page
From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
page->mapping is undefined for tail pages, so operate exclusively on
the head page.
Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
mm/page-writeback.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 7326b54ab728..e2da7d7e93b8 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2841,6 +2841,7 @@ EXPORT_SYMBOL_GPL(wait_on_page_writeback);
*/
void wait_for_stable_page(struct page *page)
{
+ page = compound_head(page);
if (bdi_cap_stable_pages_required(inode_to_bdi(page->mapping->host)))
wait_on_page_writeback(page);
}
--
2.26.2
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