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[23.128.96.18]) by mx.google.com with ESMTP id n1si2216709ejg.133.2020.10.29.09.30.10; Thu, 29 Oct 2020 09:30:35 -0700 (PDT) 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; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=fNJhb3Q0; 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; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726954AbgJ2Q1n (ORCPT + 99 others); Thu, 29 Oct 2020 12:27:43 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:26533 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726878AbgJ2Q1k (ORCPT ); Thu, 29 Oct 2020 12:27:40 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1603988859; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=w7siXqe9xLyC5jnHaj5YIsmBgb0Hn9zRskk7tPjv5dw=; b=fNJhb3Q0xJWKgoQrcxQOwyc6uEOMgPm/nH1HT6wUKPZwMN0lMrlI07v1U9Vt0J2VPuTGMB U4uMPXBzQ4g3oszWegfW8Hp0TUPCNRKpzz2FOxzcJuQThrOhz8Eaw74I2/yCn4JsnKIvT+ ka9x21ovdie8ZRhMqCGa/XG18F+7sBE= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-388-xWjC179tNFKDqVFXM7kCyQ-1; Thu, 29 Oct 2020 12:27:35 -0400 X-MC-Unique: xWjC179tNFKDqVFXM7kCyQ-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B2D6980B714; Thu, 29 Oct 2020 16:27:33 +0000 (UTC) Received: from t480s.redhat.com (ovpn-112-181.ams2.redhat.com [10.36.112.181]) by smtp.corp.redhat.com (Postfix) with ESMTP id 334855C1C4; Thu, 29 Oct 2020 16:27:31 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, David Hildenbrand , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Rashmica Gupta , Andrew Morton , Mike Rapoport , Michal Hocko , Oscar Salvador , Wei Yang Subject: [PATCH v1 2/4] powerpc/mm: print warning in arch_remove_linear_mapping() Date: Thu, 29 Oct 2020 17:27:16 +0100 Message-Id: <20201029162718.29910-3-david@redhat.com> In-Reply-To: <20201029162718.29910-1-david@redhat.com> References: <20201029162718.29910-1-david@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Let's print a warning similar to in arch_add_linear_mapping() instead of WARN_ON_ONCE() and eventually crashing the kernel. Cc: Michael Ellerman Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Rashmica Gupta Cc: Andrew Morton Cc: Mike Rapoport Cc: Michal Hocko Cc: Oscar Salvador Cc: Wei Yang Signed-off-by: David Hildenbrand --- arch/powerpc/mm/mem.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 8a86d81f8df0..685028451dd2 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -145,7 +145,9 @@ void __ref arch_remove_linear_mapping(u64 start, u64 size) flush_dcache_range_chunked(start, start + size, FLUSH_CHUNK_SIZE); ret = remove_section_mapping(start, start + size); - WARN_ON_ONCE(ret); + if (ret) + pr_warn("Unable to remove linear mapping for 0x%llx..0x%llx: %d\n", + start, start + size, ret); /* Ensure all vmalloc mappings are flushed in case they also * hit that section of memory -- 2.26.2