Received: by 2002:a05:6a10:1a4d:0:0:0:0 with SMTP id nk13csp150552pxb; Mon, 31 Jan 2022 17:55:59 -0800 (PST) X-Google-Smtp-Source: ABdhPJz0Q67mEwaLE7wBBmnFSlakky5iTUA0X6FGe40Bs6zS7kXqJbO3kPmb9ZxwFbMfOcA+EwpE X-Received: by 2002:a05:6402:22cc:: with SMTP id dm12mr23113129edb.310.1643680558777; Mon, 31 Jan 2022 17:55:58 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1643680558; cv=none; d=google.com; s=arc-20160816; b=QokEQ+FHp4hyyzfP3RS43qjiJZqsyGKD8yG9+GVwkw7//1AtCyMN3jIO4b6fAF/Y3k meHh0nYlP1garn11JwA1lzduolqbp35Qstyh0MKEWY9RDFR62okWXj2LDQrHRjEuhz4m 1SFyOOulxSvdv28X/F/wHCy72gEJ6aJV96IFvGNZ6c4HsA8mRcw8VJxOvJIWWti2ZruP dXMB2FTQFyHUGz9ZVFXtvujhI6LO7iHp6Sls0HStrItMJBkJWIuM3tXHDH9+suYY6kNS zZLLa/Ts0J560cjgwYUcptXAmpC9QufSekX3AZhc7nUpfQbP0u3jlGeh9fuSt2AXDIPQ pYHg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version:date :message-id:subject:references:in-reply-to:cc:to:from; bh=KJ3wYNzcL3EIkhEySMISGlORRP/u72ARQ7s7mQI6BHM=; b=irAWL/S9NDY/fxckbXmZODYhAWtbctlSVBIhiS28JKw8w1N0vDtjN8e+aoj0gQKC59 owOCKn+sY4nvG6tXlQENpyCCUrvsrcrk9NsewSxaJDS47DjRn+JgRdtc9b7XBq1Plkde vaUiTNgLv8CLislQvqH3MmjsZTy96mIJJVZOm4v9ap+daK/wUK8m5y25Qb5wgJLIUJKl Vm9LskbalePBt+R7+npVObUM0TkEQnmJg6/WIBW34JkV97acKWkaPpGL+2Ow7uGeHyWs X8MWSwEWq4CZ2flivqrZRrtoFU9sn7mLuH1PQ2UcVdM/I3n5RSSC5cu5hlW8PiHpS8sI 8mLA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id l11si8328806ejo.498.2022.01.31.17.55.34; Mon, 31 Jan 2022 17:55:58 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235573AbiA2LPO (ORCPT + 99 others); Sat, 29 Jan 2022 06:15:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38380 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233626AbiA2LPN (ORCPT ); Sat, 29 Jan 2022 06:15:13 -0500 Received: from gandalf.ozlabs.org (gandalf.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee2:21ea]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E317CC061714 for ; Sat, 29 Jan 2022 03:15:12 -0800 (PST) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4JmBZ56XGMz4xcS; Sat, 29 Jan 2022 22:15:09 +1100 (AEDT) From: Michael Ellerman To: Christophe Leroy , Paul Mackerras , Michael Ellerman , Benjamin Herrenschmidt Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Maxime Bizon In-Reply-To: References: Subject: Re: [PATCH] powerpc/fixmap: Fix VM debug warning on unmap Message-Id: <164345486523.1545234.1636640296413408216.b4-ty@ellerman.id.au> Date: Sat, 29 Jan 2022 22:14:25 +1100 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 6 Dec 2021 11:11:51 +0000, Christophe Leroy wrote: > Unmapping a fixmap entry is done by calling __set_fixmap() > with FIXMAP_PAGE_CLEAR as flags. > > Today, powerpc __set_fixmap() calls map_kernel_page(). > > map_kernel_page() is not happy when called a second time > for the same page. > > [...] Applied to powerpc/fixes. [1/1] powerpc/fixmap: Fix VM debug warning on unmap https://git.kernel.org/powerpc/c/aec982603aa8cc0a21143681feb5f60ecc69d718 cheers