From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755338AbbIAKWw (ORCPT ); Tue, 1 Sep 2015 06:22:52 -0400 Received: from mga09.intel.com ([134.134.136.24]:38745 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755272AbbIAKWu (ORCPT ); Tue, 1 Sep 2015 06:22:50 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,448,1437462000"; d="scan'208";a="795350302" From: "Kirill A. Shutemov" To: Andrew Morton , Matthew Wilcox Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@ml01.01.org, "Kirill A. Shutemov" , Yigal Korman , Boaz Harrosh , Jan Kara , Dave Chinner Subject: [PATCH] mm, dax: VMA with vm_ops->pfn_mkwrite wants to be write-notified Date: Tue, 1 Sep 2015 13:22:41 +0300 Message-Id: <1441102961-68041-1-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.5.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For VM_PFNMAP and VM_MIXEDMAP we use vm_ops->pfn_mkwrite instead of vm_ops->page_mkwrite to notify abort write access. This means we want vma->vm_page_prot to be write-protected if the VMA provides this vm_ops. Signed-off-by: Kirill A. Shutemov Cc: Yigal Korman Cc: Boaz Harrosh Cc: Matthew Wilcox Cc: Jan Kara Cc: Dave Chinner --- mm/mmap.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/mmap.c b/mm/mmap.c index df6d5f07035b..3f78bceefe5a 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1498,7 +1498,8 @@ int vma_wants_writenotify(struct vm_area_struct *vma) return 0; /* The backer wishes to know when pages are first written to? */ - if (vma->vm_ops && vma->vm_ops->page_mkwrite) + if (vma->vm_ops && + (vma->vm_ops->page_mkwrite || vma->vm_ops->pfn_mkwrite)) return 1; /* The open routine did something to the protections that pgprot_modify -- 2.5.0