Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966968AbdIZHVU (ORCPT ); Tue, 26 Sep 2017 03:21:20 -0400 Received: from mga11.intel.com ([192.55.52.93]:47356 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936044AbdIZHVT (ORCPT ); Tue, 26 Sep 2017 03:21:19 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.42,440,1500966000"; d="scan'208";a="153369547" From: changbin.du@intel.com To: akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Changbin Du Subject: [PATCH] mm: update comments for struct page.mapping Date: Tue, 26 Sep 2017 15:14:17 +0800 Message-Id: <1506410057-22316-1-git-send-email-changbin.du@intel.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 875 Lines: 27 From: Changbin Du The struct page.mapping can NULL or points to one object of type address_space, anon_vma or KSM private structure. Signed-off-by: Changbin Du --- include/linux/mm_types.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 46f4ecf5..8dd6cb3 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -47,8 +47,8 @@ struct page { * inode address_space, or NULL. * If page mapped as anonymous * memory, low bit is set, and - * it points to anon_vma object: - * see PAGE_MAPPING_ANON below. + * it points to anon_vma object + * or KSM private structure. */ void *s_mem; /* slab first object */ atomic_t compound_mapcount; /* first tail page */ -- 2.7.4