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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 69E11C05027 for ; Mon, 6 Feb 2023 05:17:13 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 993B76B0072; Mon, 6 Feb 2023 00:17:12 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 944366B0073; Mon, 6 Feb 2023 00:17:12 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 832656B0074; Mon, 6 Feb 2023 00:17:12 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 7451C6B0072 for ; Mon, 6 Feb 2023 00:17:12 -0500 (EST) Received: from smtpin20.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 46743120AC4 for ; Mon, 6 Feb 2023 05:17:12 +0000 (UTC) X-FDA: 80435708304.20.414A7A3 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by imf25.hostedemail.com (Postfix) with ESMTP id 5603BA0016 for ; Mon, 6 Feb 2023 05:17:10 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=linuxfoundation.org header.s=korg header.b=ggd0HV9G; spf=pass (imf25.hostedemail.com: domain of gregkh@linuxfoundation.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org; dmarc=pass (policy=none) header.from=linuxfoundation.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1675660630; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=G68imVtcMy9OhOWRJ4PPHGBn9lxTWxQthTvbLw+MN2c=; b=6qcIEW6aTxULCf1/+j4dkI4RgNSlF1ZXIGYd30Goz0C6cnwpWo8FhesGYbVg9B7gO1gA4s gBnkDhBMOn7PYurBFKNkFVG+dVjtQ6ABoac5EhnV6pDYhHVsfvxhI6vRqtHVOQ0AaTBPup 62FTf8GNZO0W9F4y+Qj5QmeZ3YpHBO0= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=linuxfoundation.org header.s=korg header.b=ggd0HV9G; spf=pass (imf25.hostedemail.com: domain of gregkh@linuxfoundation.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org; dmarc=pass (policy=none) header.from=linuxfoundation.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1675660630; a=rsa-sha256; cv=none; b=y5U63c3ubal+CfzfXw5cuWf6mOhzt/DhogFn3Tw0bBzqc7dkgL76nGwcXNShqpekP+4mL4 O17eR7HPin4J++/vKoXu4myp9Pq/o83/uhSso3DO7JTRtHfFE6ecJ6jc9DbmxE/WfhHM9h c5y8vBBtxg+kzbEQ0/cTK9+uQJcvUqk= Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 793CEB80D19; Mon, 6 Feb 2023 05:17:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7EF63C433D2; Mon, 6 Feb 2023 05:17:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1675660627; bh=IOaVM/sUdZ4EOC4ES3KNjUSwD0PavkGrsos3VJBn+uw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ggd0HV9GyaNAjGCVVShKOLR6wV2owadaL1D+vgTGWu5ebIby/+Z+bP0svkY6aqQhD OQQP2kvQUvnQg8y/R2dTqeyuY0zlLcoUgLq94SBTrNL6nxCDJwcWu3u+Xt2wELzE8a vRxfELVHJCjLKSLwLBjnauPdJuCoaiiD/B6Uo2Mw= Date: Mon, 6 Feb 2023 06:17:03 +0100 From: Greg Kroah-Hartman To: Hillf Danton Cc: Alan Stern , Tetsuo Handa , "Rafael J. Wysocki" , linux-mm@kvack.org, LKML , USB list , Linus Torvalds Subject: Re: Converting dev->mutex into dev->spinlock ? Message-ID: References: <28a82f50-39d5-a45f-7c7a-57a66cec0741@I-love.SAKURA.ne.jp> <917e1e3b-094f-e594-c1a2-8b97fb5195fd@I-love.SAKURA.ne.jp> <20230206025629.1786-1-hdanton@sina.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230206025629.1786-1-hdanton@sina.com> X-Rspam-User: X-Rspamd-Server: rspam03 X-Stat-Signature: 5cm4k8q38z9n4zdyrmshgamkr693xuqa X-Rspamd-Queue-Id: 5603BA0016 X-HE-Tag: 1675660630-404597 X-HE-Meta: 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 3SFYGgMm BQDAYPKZ2rQ7NMca1bscBnWdCFkNA32TZqvx1zEv9tp18PDaL5H8MN3cXwwUjCuUWU4h6GvkIkCvKeD+fXC+NqOefyGXTqCm3KLWg1gqTPkwDKb3RQWie3voRm8JL9gdbHZknRKwSXkxYGduyo85BDaP9dafXlN8pXr9CdsuLY/xwZOQYqxCLBWeIITmhfkeS3BykcxL457Xo8JzmGXBIWnC+LsyxTwA7XMBBDk7sYKkRahL3RxDvhymn33ph5kwC50Fypmmzv9Ho2voGRKcZ0UuOLNs+lbF+XQJhb8Lt1/ROodqIbg3PEJ2Vdmde9IdNdcXcjS2azHEmc60WWfLimAjKc4U7byQJ+ZrzV8nw2CU/XdlEeiVgi4+xL9aRZ5gUKNBxY2IlhhSDsvtEe7bx/RhJMFHaszHBe3Th 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 Mon, Feb 06, 2023 at 10:56:29AM +0800, Hillf Danton wrote: > On Sun, 5 Feb 2023 11:46:06 -0500 Alan Stern > > > > And by the way, by disabling lockdep validation I am declaraing that > > enabling it would cause an overwhelming number of false positives, > > Could you share 5 false positives you see upstream to help understand how > it is useless? Please see this other email in this thread: https://lore.kernel.org/r/Y98FLlr7jkiFlV0k@rowland.harvard.edu