From patchwork Thu Jul 15 03:35:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12378591 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3C4EFC07E96 for ; Thu, 15 Jul 2021 04:19:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 18AC261360 for ; Thu, 15 Jul 2021 04:19:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235472AbhGOEWk (ORCPT ); Thu, 15 Jul 2021 00:22:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54688 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233862AbhGOEWk (ORCPT ); Thu, 15 Jul 2021 00:22:40 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8D1EEC06175F; Wed, 14 Jul 2021 21:19:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=TCeIycJ0VBmfdDjFJis4rziunkk2jYfcqWr47jM0A6w=; b=hX+LWden5mfIQEpU4c1BH7LtcA TwaU/4kB/cftZXp3G4h+JkzAY0mtabv/0MVUUEDj5zz4wis+cAGecPoIsmA7ETm/a4dc6FSBeiwgC 86Pk1sr18zn5gSbTKZLro0He5niwpR/PKwe5E01clCTD32MQywfOoqGJP2fe5XscnbXVssn7P1g4G 518vzLvh8/z9HtxRpauIzXpPtMT0pyyU17MKOfnRf6ABtAD6BNgrxdteQsRDWU+Lpw1mlPRvJjXWx 0ZKDReH4lZplNBdwPHFqm76SmM7KSP2pzSIEJiMK1OVBEQVvjkElPJIhOJIgHkQgBtiJ6L1R8kIkg wIZtk6QA==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1m3spO-002wkP-1W; Thu, 15 Jul 2021 04:18:44 +0000 From: "Matthew Wilcox (Oracle)" To: linux-kernel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v14 052/138] mm: Add folio_raw_mapping() Date: Thu, 15 Jul 2021 04:35:38 +0100 Message-Id: <20210715033704.692967-53-willy@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210715033704.692967-1-willy@infradead.org> References: <20210715033704.692967-1-willy@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Convert __page_rmapping to folio_raw_mapping and move it to mm/internal.h. It's only a couple of instructions (load and mask), so it's definitely going to be cheaper to inline it than call it. Leave page_rmapping out of line. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: David Howells Acked-by: Vlastimil Babka --- mm/internal.h | 7 +++++++ mm/util.c | 20 ++++---------------- 2 files changed, 11 insertions(+), 16 deletions(-) diff --git a/mm/internal.h b/mm/internal.h index 1a8851b73031..fa31a7f0ed79 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -34,6 +34,13 @@ void page_writeback_init(void); +static inline void *folio_raw_mapping(struct folio *folio) +{ + unsigned long mapping = (unsigned long)folio->mapping; + + return (void *)(mapping & ~PAGE_MAPPING_FLAGS); +} + vm_fault_t do_swap_page(struct vm_fault *vmf); void folio_rotate_reclaimable(struct folio *folio); diff --git a/mm/util.c b/mm/util.c index e8c12350b3eb..d0aa1d9c811e 100644 --- a/mm/util.c +++ b/mm/util.c @@ -635,21 +635,10 @@ void kvfree_sensitive(const void *addr, size_t len) } EXPORT_SYMBOL(kvfree_sensitive); -static inline void *__page_rmapping(struct page *page) -{ - unsigned long mapping; - - mapping = (unsigned long)page->mapping; - mapping &= ~PAGE_MAPPING_FLAGS; - - return (void *)mapping; -} - /* Neutral page->mapping pointer to address_space or anon_vma or other */ void *page_rmapping(struct page *page) { - page = compound_head(page); - return __page_rmapping(page); + return folio_raw_mapping(page_folio(page)); } /** @@ -680,13 +669,12 @@ EXPORT_SYMBOL(folio_mapped); struct anon_vma *page_anon_vma(struct page *page) { - unsigned long mapping; + struct folio *folio = page_folio(page); + unsigned long mapping = (unsigned long)folio->mapping; - page = compound_head(page); - mapping = (unsigned long)page->mapping; if ((mapping & PAGE_MAPPING_FLAGS) != PAGE_MAPPING_ANON) return NULL; - return __page_rmapping(page); + return (void *)(mapping - PAGE_MAPPING_ANON); } /**