From patchwork Tue Feb 19 20:04:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jerome Glisse X-Patchwork-Id: 10820721 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C06FD14E1 for ; Tue, 19 Feb 2019 20:05:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B28F12CAAF for ; Tue, 19 Feb 2019 20:05:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A39EB2CBC0; Tue, 19 Feb 2019 20:05:10 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4002F2CAAF for ; Tue, 19 Feb 2019 20:05:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729887AbfBSUEu (ORCPT ); Tue, 19 Feb 2019 15:04:50 -0500 Received: from mx1.redhat.com ([209.132.183.28]:49070 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729891AbfBSUEt (ORCPT ); Tue, 19 Feb 2019 15:04:49 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 6A42A369A0; Tue, 19 Feb 2019 20:04:48 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-122-134.rdu2.redhat.com [10.10.122.134]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5ABE86013D; Tue, 19 Feb 2019 20:04:45 +0000 (UTC) From: jglisse@redhat.com To: linux-mm@kvack.org, Andrew Morton Cc: linux-kernel@vger.kernel.org, =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , =?utf-8?q?Christian_?= =?utf-8?q?K=C3=B6nig?= , Joonas Lahtinen , Jani Nikula , Rodrigo Vivi , Jan Kara , Andrea Arcangeli , Peter Xu , Felix Kuehling , Jason Gunthorpe , Ross Zwisler , Dan Williams , Paolo Bonzini , =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= , Michal Hocko , Ralph Campbell , John Hubbard , kvm@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-fsdevel@vger.kernel.org, Arnd Bergmann Subject: [PATCH v5 1/9] mm/mmu_notifier: helper to test if a range invalidation is blockable Date: Tue, 19 Feb 2019 15:04:22 -0500 Message-Id: <20190219200430.11130-2-jglisse@redhat.com> In-Reply-To: <20190219200430.11130-1-jglisse@redhat.com> References: <20190219200430.11130-1-jglisse@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Tue, 19 Feb 2019 20:04:48 +0000 (UTC) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jérôme Glisse Simple helpers to test if range invalidation is blockable. Latter patches use cocinnelle to convert all direct dereference of range-> blockable to use this function instead so that we can convert the blockable field to an unsigned for more flags. Signed-off-by: Jérôme Glisse Cc: Christian König Cc: Joonas Lahtinen Cc: Jani Nikula Cc: Rodrigo Vivi Cc: Jan Kara Cc: Andrea Arcangeli Cc: Peter Xu Cc: Felix Kuehling Cc: Jason Gunthorpe Cc: Andrew Morton Cc: Ross Zwisler Cc: Dan Williams Cc: Paolo Bonzini Cc: Radim Krčmář Cc: Michal Hocko Cc: Christian Koenig Cc: Ralph Campbell Cc: John Hubbard Cc: kvm@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Cc: linux-rdma@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org Cc: Arnd Bergmann Reviewed-by: Ralph Campbell --- include/linux/mmu_notifier.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h index 4050ec1c3b45..e630def131ce 100644 --- a/include/linux/mmu_notifier.h +++ b/include/linux/mmu_notifier.h @@ -226,6 +226,12 @@ extern void __mmu_notifier_invalidate_range_end(struct mmu_notifier_range *r, extern void __mmu_notifier_invalidate_range(struct mm_struct *mm, unsigned long start, unsigned long end); +static inline bool +mmu_notifier_range_blockable(const struct mmu_notifier_range *range) +{ + return range->blockable; +} + static inline void mmu_notifier_release(struct mm_struct *mm) { if (mm_has_notifiers(mm)) @@ -455,6 +461,11 @@ static inline void _mmu_notifier_range_init(struct mmu_notifier_range *range, #define mmu_notifier_range_init(range, mm, start, end) \ _mmu_notifier_range_init(range, start, end) +static inline bool +mmu_notifier_range_blockable(const struct mmu_notifier_range *range) +{ + return true; +} static inline int mm_has_notifiers(struct mm_struct *mm) {