From patchwork Sat Jul 25 02:38:00 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 6863481 X-Patchwork-Delegate: dan.j.williams@gmail.com Return-Path: X-Original-To: patchwork-linux-nvdimm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 1D1BE9F1D4 for ; Sat, 25 Jul 2015 02:43:46 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3AF0C2056E for ; Sat, 25 Jul 2015 02:43:45 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D4171205C7 for ; Sat, 25 Jul 2015 02:43:43 +0000 (UTC) Received: from ml01.vlan14.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id C0859182A4A; Fri, 24 Jul 2015 19:43:43 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by ml01.01.org (Postfix) with ESMTP id EC758182A48 for ; Fri, 24 Jul 2015 19:43:42 -0700 (PDT) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga103.jf.intel.com with ESMTP; 24 Jul 2015 19:43:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,542,1432623600"; d="scan'208";a="612481732" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.11]) by orsmga003.jf.intel.com with ESMTP; 24 Jul 2015 19:43:43 -0700 Subject: [PATCH v2 01/25] mm, x86: Fix warning in ioremap RAM check From: Dan Williams To: tglx@linutronix.de, mingo@kernel.org, hpa@zytor.com Date: Fri, 24 Jul 2015 22:38:00 -0400 Message-ID: <20150725023800.8664.47177.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <20150725023649.8664.59145.stgit@dwillia2-desk3.amr.corp.intel.com> References: <20150725023649.8664.59145.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.17.1-8-g92dd MIME-Version: 1.0 Cc: linux-arch@vger.kernel.org, linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org, Roland Dreier , Ingo Molnar , Borislav Petkov , rmk+kernel@arm.linux.org.uk, kbuild test robot , hch@lst.de, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Spam-Status: No, score=-3.8 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Toshi Kani __ioremap_caller() calls __ioremap_check_ram() through walk_system_ram_range() to check if a target range is in RAM. __ioremap_check_ram() has WARN_ONCE() in a wrong place where it warns when the given range is not RAM. This misplaced warning is not exposed since walk_system_ram_range() only calls __ioremap_check_ram() for RAM ranges. Move the WARN_ONCE() to __ioremap_caller(), and update the message to include the address range. Signed-off-by: Toshi Kani Cc: Roland Dreier Cc: Luis R. Rodriguez Cc: Thomas Gleixner Cc: H. Peter Anvin Cc: Ingo Molnar Cc: Borislav Petkov [djbw: fix format specifier warnings] Reported-by: kbuild test robot Signed-off-by: Dan Williams --- arch/x86/mm/ioremap.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index cc5ccc415cc0..c13f7fdca142 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -63,8 +63,6 @@ static int __ioremap_check_ram(unsigned long start_pfn, unsigned long nr_pages, !PageReserved(pfn_to_page(start_pfn + i))) return 1; - WARN_ONCE(1, "ioremap on RAM pfn 0x%lx\n", start_pfn); - return 0; } @@ -131,8 +129,11 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr, pfn = phys_addr >> PAGE_SHIFT; last_pfn = last_addr >> PAGE_SHIFT; if (walk_system_ram_range(pfn, last_pfn - pfn + 1, NULL, - __ioremap_check_ram) == 1) + __ioremap_check_ram) == 1) { + WARN_ONCE(1, "ioremap on RAM at %pa - %pa\n", + &phys_addr, &last_addr); return NULL; + } } /* * Mappings have to be page-aligned