| From | Matthew Wilcox <> | Subject | [PATCH v4 30/36] mm: Support tail pages in wait_for_stable_page | Date | Fri, 15 May 2020 06:16:50 -0700 |
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From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
page->mapping is undefined for tail pages, so operate exclusively on the head page.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.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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