From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Kirill A. Shutemov" 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> Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, "Kirill A. Shutemov" , Yigal Korman , Boaz Harrosh , Jan Kara , Dave Chinner To: Andrew Morton , Matthew Wilcox Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-fsdevel.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