From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40485) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YTZQX-00049o-Vx for qemu-devel@nongnu.org; Thu, 05 Mar 2015 12:19:20 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YTZQR-0007cV-GM for qemu-devel@nongnu.org; Thu, 05 Mar 2015 12:19:13 -0500 Received: from mx1.redhat.com ([209.132.183.28]:45661) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YTZQR-0007bz-7Z for qemu-devel@nongnu.org; Thu, 05 Mar 2015 12:19:07 -0500 From: Andrea Arcangeli Date: Thu, 5 Mar 2015 18:18:04 +0100 Message-Id: <1425575884-2574-22-git-send-email-aarcange@redhat.com> In-Reply-To: <1425575884-2574-1-git-send-email-aarcange@redhat.com> References: <1425575884-2574-1-git-send-email-aarcange@redhat.com> Subject: [Qemu-devel] [PATCH 21/21] userfaultfd: add userfaultfd_wp mm helpers List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-api@vger.kernel.org, Android Kernel Team Cc: Robert Love , Dave Hansen , Jan Kara , Neil Brown , Stefan Hajnoczi , Andrew Jones , Sanidhya Kashyap , KOSAKI Motohiro , Michel Lespinasse , Taras Glek , zhang.zhanghailiang@huawei.com, Pavel Emelyanov , Hugh Dickins , Mel Gorman , Sasha Levin , "Dr. David Alan Gilbert" , "Huangpeng (Peter)" , Andres Lagar-Cavilla , Christopher Covington , Anthony Liguori , Paolo Bonzini , "Kirill A. Shutemov" , Keith Packard , Wenchao Xia , Juan Quintela , Andy Lutomirski , Minchan Kim , Dmitry Adamushko , Johannes Weiner , Mike Hommey , Andrew Morton , Linus Torvalds , Peter Feiner These helpers will be used to know if to call handle_userfault() during wrprotect faults in order to deliver the wrprotect faults to userland. Signed-off-by: Andrea Arcangeli --- include/linux/userfaultfd_k.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h index 3c39a4f..81f0d11 100644 --- a/include/linux/userfaultfd_k.h +++ b/include/linux/userfaultfd_k.h @@ -65,6 +65,11 @@ static inline bool userfaultfd_missing(struct vm_area_struct *vma) return vma->vm_flags & VM_UFFD_MISSING; } +static inline bool userfaultfd_wp(struct vm_area_struct *vma) +{ + return vma->vm_flags & VM_UFFD_WP; +} + static inline bool userfaultfd_armed(struct vm_area_struct *vma) { return vma->vm_flags & (VM_UFFD_MISSING | VM_UFFD_WP); @@ -92,6 +97,11 @@ static inline bool userfaultfd_missing(struct vm_area_struct *vma) return false; } +static inline bool userfaultfd_wp(struct vm_area_struct *vma) +{ + return false; +} + static inline bool userfaultfd_armed(struct vm_area_struct *vma) { return false;