Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752949AbcC0Trv (ORCPT ); Sun, 27 Mar 2016 15:47:51 -0400 Received: from mga04.intel.com ([192.55.52.120]:41985 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752405AbcC0Trt (ORCPT ); Sun, 27 Mar 2016 15:47:49 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,402,1455004800"; d="scan'208";a="946020385" From: "Kirill A. Shutemov" To: Eric Biggers Cc: Hugh Dickins , linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Kirill A. Shutemov" Subject: [PATCH 3/4] page-flags: make page flag helpers accept struct head_page Date: Sun, 27 Mar 2016 22:47:39 +0300 Message-Id: <1459108060-69891-3-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.8.0.rc3 In-Reply-To: <1459108060-69891-1-git-send-email-kirill.shutemov@linux.intel.com> References: <20160327194649.GA9638@node.shutemov.name> <1459108060-69891-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2179 Lines: 70 This patch makes all generated page flag helpers to accept pointer to struct head_page as well as struct page. In case if pointer to struct head_page is passed, we assume that it's head page and bypass policy constrain checks. Note, to get get inteface consistent we would need to make non-generated page flag helper to accept struct head_page as well. Not-yet-signed-off-by: Kirill A. Shutemov --- scripts/mkpageflags.sh | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/scripts/mkpageflags.sh b/scripts/mkpageflags.sh index 29d46bccaea4..272aab4ad1a3 100755 --- a/scripts/mkpageflags.sh +++ b/scripts/mkpageflags.sh @@ -6,23 +6,23 @@ fatal() { } any() { - echo "(__p)" + echo "((struct page *)(__p))" } head() { - echo "compound_head(__p)" + echo "compound_head((struct page *)(__p))" } no_tail() { local enforce="${1:+VM_BUG_ON_PGFLAGS(PageTail(__p), __p);}" - echo "({$enforce compound_head(__p);})" + echo "({$enforce compound_head((struct page *)(__p));})" } no_compound() { local enforce="${1:+VM_BUG_ON_PGFLAGS(PageCompound(__p), __p);}" - echo "({$enforce __p;})" + echo "({$enforce ((struct page *)(__p));})" } generate_test() { @@ -34,7 +34,9 @@ generate_test() { cat <page.flags); \\ + else if (__builtin_types_compatible_p(typeof(*(__p)), struct page)) \\ ret = $op(PG_$lname, &$page->flags); \\ else \\ BUILD_BUG(); \\ @@ -52,7 +54,9 @@ generate_mod() { cat <page.flags); \\ + else if (__builtin_types_compatible_p(typeof(*(__p)), struct page)) \\ $op(PG_$lname, &$page->flags); \\ else \\ BUILD_BUG(); \\ -- 2.8.0.rc3