From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f45.google.com (mail-pa0-f45.google.com [209.85.220.45]) by kanga.kvack.org (Postfix) with ESMTP id 54DA36B0039 for ; Fri, 12 Sep 2014 17:14:33 -0400 (EDT) Received: by mail-pa0-f45.google.com with SMTP id rd3so2126284pab.4 for ; Fri, 12 Sep 2014 14:14:33 -0700 (PDT) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org. [140.211.169.12]) by mx.google.com with ESMTPS id ya2si10182159pbb.87.2014.09.12.14.14.31 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 12 Sep 2014 14:14:31 -0700 (PDT) Date: Fri, 12 Sep 2014 14:14:29 -0700 From: Andrew Morton Subject: Re: [PATCH] mm: export symbol dependencies of is_zero_pfn() Message-Id: <20140912141429.17d570d1a7e1cb99ec73f0f7@linux-foundation.org> In-Reply-To: <1410553043-575-1-git-send-email-ard.biesheuvel@linaro.org> References: <1410553043-575-1-git-send-email-ard.biesheuvel@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Ard Biesheuvel Cc: kvm@vger.kernel.org, pbonzini@redhat.com, christoffer.dall@linaro.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@linux-mips.org, ralf@linux-mips.org, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com On Fri, 12 Sep 2014 22:17:23 +0200 Ard Biesheuvel wrote: > In order to make the static inline function is_zero_pfn() callable by > modules, export its symbol dependencies 'zero_pfn' and (for s390 and > mips) 'zero_page_mask'. So hexagon and score get the export if/when needed. > We need this for KVM, as CONFIG_KVM is a tristate for all supported > architectures except ARM and arm64, and testing a pfn whether it refers > to the zero page is required to correctly distinguish the zero page > from other special RAM ranges that may also have the PG_reserved bit > set, but need to be treated as MMIO memory. > > Signed-off-by: Ard Biesheuvel > --- > arch/mips/mm/init.c | 1 + > arch/s390/mm/init.c | 1 + > mm/memory.c | 2 ++ Looks OK to me. Please include the patch in whichever tree is is that needs it, and merge it up via that tree. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org