From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 66F46C433DF for ; Thu, 21 May 2020 07:35:43 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 291CB205CB for ; Thu, 21 May 2020 07:35:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 291CB205CB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.cz Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id B12A38001B; Thu, 21 May 2020 03:35:42 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id AC2EC80007; Thu, 21 May 2020 03:35:42 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9D92E8001B; Thu, 21 May 2020 03:35:42 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0179.hostedemail.com [216.40.44.179]) by kanga.kvack.org (Postfix) with ESMTP id 8829980007 for ; Thu, 21 May 2020 03:35:42 -0400 (EDT) Received: from smtpin26.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id B25074DCA for ; Thu, 21 May 2020 07:35:40 +0000 (UTC) X-FDA: 76839916440.26.tail74_4ea21ed543c41 X-HE-Tag: tail74_4ea21ed543c41 X-Filterd-Recvd-Size: 1968 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by imf31.hostedemail.com (Postfix) with ESMTP for ; Thu, 21 May 2020 07:35:40 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id E0F3FACE3; Thu, 21 May 2020 07:35:39 +0000 (UTC) Subject: Re: [PATCH v6 09/12] mmap locking API: add mmap_assert_locked() and mmap_assert_write_locked() To: Michel Lespinasse , Andrew Morton , linux-mm Cc: LKML , Peter Zijlstra , Laurent Dufour , Matthew Wilcox , Liam Howlett , Jerome Glisse , Davidlohr Bueso , David Rientjes , Hugh Dickins , Ying Han , Jason Gunthorpe , Daniel Jordan , John Hubbard References: <20200520052908.204642-1-walken@google.com> <20200520052908.204642-10-walken@google.com> From: Vlastimil Babka Message-ID: Date: Thu, 21 May 2020 09:35:35 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: <20200520052908.204642-10-walken@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 5/20/20 7:29 AM, Michel Lespinasse wrote: > Add new APIs to assert that mmap_sem is held. > > Using this instead of rwsem_is_locked and lockdep_assert_held[_write] > makes the assertions more tolerant of future changes to the lock type. > > Signed-off-by: Michel Lespinasse Reviewed-by: Vlastimil Babka