From fe01748ca6d6ad25d31eaa61d155f5ecf80907cc Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Fri, 17 Nov 2023 16:14:45 +0000 Subject: [PATCH] memory-failure: use a folio in me_huge_page() [ Upstream commit b6fd410c32f1a66a52a42d6aae1ab7b011b74547 ] This function was already explicitly calling compound_head(); unfortunately the compiler can't know that and elide the redundant calls to compound_head() buried in page_mapping(), unlock_page(), etc. Switch to using a folio, which does let us elide these calls. Link: https://lkml.kernel.org/r/20231117161447.2461643-5-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Cc: Naoya Horiguchi Signed-off-by: Andrew Morton Stable-dep-of: 8cf360b9d6a8 ("mm/memory-failure: fix handling of dissolved but not taken off from buddy pages") Signed-off-by: Sasha Levin --- mm/memory-failure.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 5378edad9df8..9c27ec0a27a3 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1193,25 +1193,25 @@ static int me_swapcache_clean(struct page_state *ps, struct page *p) */ static int me_huge_page(struct page_state *ps, struct page *p) { + struct folio *folio = page_folio(p); int res; - struct page *hpage = compound_head(p); struct address_space *mapping; bool extra_pins = false; - mapping = page_mapping(hpage); + mapping = folio_mapping(folio); if (mapping) { - res = truncate_error_page(hpage, page_to_pfn(p), mapping); + res = truncate_error_page(&folio->page, page_to_pfn(p), mapping); /* The page is kept in page cache. */ extra_pins = true; - unlock_page(hpage); + folio_unlock(folio); } else { - unlock_page(hpage); + folio_unlock(folio); /* * migration entry prevents later access on error hugepage, * so we can free and dissolve it into buddy to save healthy * subpages. */ - put_page(hpage); + folio_put(folio); if (__page_handle_poison(p) >= 0) { page_ref_inc(p); res = MF_RECOVERED;