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[23.128.96.18]) by mx.google.com with ESMTP id a14si12851084ejc.200.2021.03.02.13.26.05; Tue, 02 Mar 2021 13:26:28 -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; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=H77eztOw; 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 S1382510AbhCBJ0v (ORCPT + 99 others); Tue, 2 Mar 2021 04:26:51 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:48243 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1378917AbhCBJG0 (ORCPT ); Tue, 2 Mar 2021 04:06:26 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614675898; h=from:from: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:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=zKR5m0U4Kyxf0YAKbBROA6h6lzGB5mUnbgoPuKmwmCE=; b=H77eztOwAPapHBfK9Nup6cmGWflYz0Xl9h+EFPdKh5ZP6Atls9kNgUbDXTRRL575somxfD yY6rYlEwhqR54ETGZF9AP9qKD0tfFhsAyUpOv5Y1zocVUE6sBBeGtNQOJilBp8m84W62Tm eKqwxo6zQHOQtJilPNEAhi2/Er1qD2k= 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-194-DqEAEwDGNXOLgLHqx4u4gA-1; Tue, 02 Mar 2021 04:04:54 -0500 X-MC-Unique: DqEAEwDGNXOLgLHqx4u4gA-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 2A22750743; Tue, 2 Mar 2021 09:04:52 +0000 (UTC) Received: from [10.36.114.189] (ovpn-114-189.ams2.redhat.com [10.36.114.189]) by smtp.corp.redhat.com (Postfix) with ESMTP id CF1D457; Tue, 2 Mar 2021 09:04:48 +0000 (UTC) Subject: Re: [PATCH v1] microblaze: tag highmem_setup() with __meminit To: Oscar Salvador Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, kernel test robot , Andrew Morton , Michal Simek , Mike Rapoport , Thomas Gleixner , Arvind Sankar , Ira Weiny , Randy Dunlap , Anshuman Khandual References: <20210301114749.47914-1-david@redhat.com> <20210301221846.GA4744@localhost.localdomain> From: David Hildenbrand Organization: Red Hat GmbH Message-ID: Date: Tue, 2 Mar 2021 10:04:47 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.0 MIME-Version: 1.0 In-Reply-To: <20210301221846.GA4744@localhost.localdomain> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01.03.21 23:18, Oscar Salvador wrote: > On Mon, Mar 01, 2021 at 12:47:49PM +0100, David Hildenbrand wrote: >> With commit a0cd7a7c4bc0 ("mm: simplify free_highmem_page() and >> free_reserved_page()") the kernel test robot complains about a warning: >> >> WARNING: modpost: vmlinux.o(.text.unlikely+0x23ac): Section mismatch in >> reference from the function highmem_setup() to the function >> .meminit.text:memblock_is_reserved() >> >> This has been broken ever since microblaze added highmem support, >> because memblock_is_reserved() was already tagged with "__init" back then - >> most probably the function always got inlined, so we never stumbled over >> it. > > It might be good to point out that we need __meminit instead of __init > because microblaze platform does not define CONFIG_ARCH_KEEP_MEMBLOCK, > and __init_memblock fallsback to that. > > (I had to go and look as I was puzzled :-) ) > > Reviewed-by: Oscar Salvador Thanks! Whoever feels like picking this up (@Andrew?) can you add "We need __meminit because __init_memblock defaults to that without CONFIG_ARCH_KEEP_MEMBLOCK" and __init_memblock is not used outside memblock code. -- Thanks, David / dhildenb