From patchwork Wed Jun 8 15:02:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12874122 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7214AC43334 for ; Wed, 8 Jun 2022 15:13:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243832AbiFHPNQ (ORCPT ); Wed, 8 Jun 2022 11:13:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56660 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242464AbiFHPLt (ORCPT ); Wed, 8 Jun 2022 11:11:49 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 992814A0037; Wed, 8 Jun 2022 08:03:26 -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=L/W62gIhDvny0+evT6hKu8mfiF8YLXl9JHSXNMT2CL8=; b=E/cR7+jnh4MZjUekK6MX3paPTV rpyCm/XiDAOZDdkAxiR6ENBOGDspVwZofRubYVUCyfBG/q0G2P76APSKvJQYDoJJHnpbIZIfvndzv b2tINK8pbPtEv8uVgJlVmXLf0Zb7aTLK/Av4cH/ZFWlwIwtyIRzsKjAlUgHGt/pj4W+imiRHLVDU6 HWs4rwESaohScBPmkWkya7wcDDvYQG1mSEtqOj+cki1hdMlVwH8fFsV0sNL2uKq8yjL+T8WmSb+iF zAP5EwizELetbeBerNs7aFo2HX55u2FQyB9sVWH9wzoFE+fXlWb8vKSJpwwQJNZs4KPFu+kaJl/nK iSwBCYeA==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1nyxCu-00CjFS-Ds; Wed, 08 Jun 2022 15:02:52 +0000 From: "Matthew Wilcox (Oracle)" To: linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-aio@kvack.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-mm@kvack.org, linux-xfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-ntfs-dev@lists.sourceforge.net, ocfs2-devel@oss.oracle.com, linux-mtd@lists.infradead.org, virtualization@lists.linux-foundation.org, Christoph Hellwig Subject: [PATCH v2 07/19] mm/migrate: Convert expected_page_refs() to folio_expected_refs() Date: Wed, 8 Jun 2022 16:02:37 +0100 Message-Id: <20220608150249.3033815-8-willy@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220608150249.3033815-1-willy@infradead.org> References: <20220608150249.3033815-1-willy@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Now that both callers have a folio, convert this function to take a folio & rename it. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig --- mm/migrate.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/mm/migrate.c b/mm/migrate.c index 2975f0c4d7cf..2e2f41572066 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -336,13 +336,18 @@ void pmd_migration_entry_wait(struct mm_struct *mm, pmd_t *pmd) } #endif -static int expected_page_refs(struct address_space *mapping, struct page *page) +static int folio_expected_refs(struct address_space *mapping, + struct folio *folio) { - int expected_count = 1; + int refs = 1; + if (!mapping) + return refs; - if (mapping) - expected_count += compound_nr(page) + page_has_private(page); - return expected_count; + refs += folio_nr_pages(folio); + if (folio_get_private(folio)) + refs++; + + return refs; } /* @@ -359,7 +364,7 @@ int folio_migrate_mapping(struct address_space *mapping, XA_STATE(xas, &mapping->i_pages, folio_index(folio)); struct zone *oldzone, *newzone; int dirty; - int expected_count = expected_page_refs(mapping, &folio->page) + extra_count; + int expected_count = folio_expected_refs(mapping, folio) + extra_count; long nr = folio_nr_pages(folio); if (!mapping) { @@ -669,7 +674,7 @@ static int __buffer_migrate_folio(struct address_space *mapping, return migrate_page(mapping, &dst->page, &src->page, mode); /* Check whether page does not have extra refs before we do more work */ - expected_count = expected_page_refs(mapping, &src->page); + expected_count = folio_expected_refs(mapping, src); if (folio_ref_count(src) != expected_count) return -EAGAIN;