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=-9.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 31917C56201 for ; Thu, 29 Oct 2020 16:27:45 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9A50020838 for ; Thu, 29 Oct 2020 16:27:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Bl79rhyD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9A50020838 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 24AD86B0071; Thu, 29 Oct 2020 12:27:44 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 1D3516B0073; Thu, 29 Oct 2020 12:27:44 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 076886B0074; Thu, 29 Oct 2020 12:27:44 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0043.hostedemail.com [216.40.44.43]) by kanga.kvack.org (Postfix) with ESMTP id CDD7A6B0071 for ; Thu, 29 Oct 2020 12:27:43 -0400 (EDT) Received: from smtpin05.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 728B2180AD806 for ; Thu, 29 Oct 2020 16:27:43 +0000 (UTC) X-FDA: 77425494006.05.angle48_010ab792728e Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin05.hostedemail.com (Postfix) with ESMTP id 586A318026121 for ; Thu, 29 Oct 2020 16:27:43 +0000 (UTC) X-HE-Tag: angle48_010ab792728e X-Filterd-Recvd-Size: 3714 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) by imf08.hostedemail.com (Postfix) with ESMTP for ; Thu, 29 Oct 2020 16:27:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1603988860; 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=Bl79rhyDykTJtBQGezr/eb3nchFCBo0Vo6l+of9XeRLx9yp7EBhBimJ3DxfFuQDpLkHTvl tZsk5pigsG5zZMvo2lDadbxiErNbw2WtrHQcLHiCFF2tJZJNGwUf5Wqu5kRol+pCPeS/es ckR2wYBE0r42FWuklXspRtmg29kY/N4= 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 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Content-Transfer-Encoding: quoted-printable 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: 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); =20 ret =3D 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); =20 /* Ensure all vmalloc mappings are flushed in case they also * hit that section of memory --=20 2.26.2