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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable 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 51FBDC43387 for ; Fri, 4 Jan 2019 22:06:59 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 91FAF2087F for ; Fri, 4 Jan 2019 22:06:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 91FAF2087F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=telegraphics.com.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 43Wf5X1Qv2zDqML for ; Sat, 5 Jan 2019 09:06:56 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=telegraphics.com.au (client-ip=98.124.60.144; helo=kvm5.telegraphics.com.au; envelope-from=fthain@telegraphics.com.au; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=telegraphics.com.au Received: from kvm5.telegraphics.com.au (kvm5.telegraphics.com.au [98.124.60.144]) by lists.ozlabs.org (Postfix) with ESMTP id 43Wf3Y5rCRzDqKP for ; Sat, 5 Jan 2019 09:05:13 +1100 (AEDT) Received: from localhost (localhost.localdomain [127.0.0.1]) by kvm5.telegraphics.com.au (Postfix) with ESMTP id 3770929D56; Fri, 4 Jan 2019 17:05:09 -0500 (EST) Date: Sat, 5 Jan 2019 09:05:33 +1100 (AEDT) From: Finn Thain To: Christoph Hellwig Subject: Re: [PATCH v8 05/25] char/nvram: Adopt arch_nvram_ops In-Reply-To: <20190104175639.GA6347@infradead.org> Message-ID: References: <66ed571883695314ace53080df8f6dfb132a8b4d.1545784679.git.fthain@telegraphics.com.au> <20190103080229.GB11147@infradead.org> <20190104175639.GA6347@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Greg Kroah-Hartman , linux-m68k@lists.linux-m68k.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Arnd Bergmann Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, 4 Jan 2019, Christoph Hellwig wrote: > On Fri, Jan 04, 2019 at 09:08:13AM +1100, Finn Thain wrote: > > On Thu, 3 Jan 2019, Christoph Hellwig wrote: > > > > > > + > > > > +const struct nvram_ops arch_nvram_ops = { > > > > + .read_byte = nvram_read_byte, > > > > + .write_byte = nvram_write_byte, > > > > + .get_size = nvram_get_size, > > > > +}; > > > > +EXPORT_SYMBOL(arch_nvram_ops); > > > > > > I think something this internal should always be EXPORT_SYMBOL_GPL. > > > > > > > By "internal" do you mean "not involving interests outside of the Linux > > Foundation"? TBH, I don't know who's affected. > > Linux Foundation doesn't matter. > > But as far as I can see you export the struct from arch code > for nvram.ko to use them and no one else, which is clearly internal. > No, arch_nvram_ops is not "internal" in that sense. The struct is used whereever the nvram_* exports are presently used: $ git grep -e "EXPORT_SYMBOL.*nvram" v4.20 ... v4.20:arch/powerpc/kernel/setup_32.c:EXPORT_SYMBOL(nvram_read_byte); v4.20:arch/powerpc/kernel/setup_32.c:EXPORT_SYMBOL(nvram_write_byte); v4.20:arch/powerpc/kernel/setup_32.c:EXPORT_SYMBOL(nvram_get_size); v4.20:arch/powerpc/kernel/setup_32.c:EXPORT_SYMBOL(nvram_sync); v4.20:drivers/char/nvram.c:EXPORT_SYMBOL(__nvram_read_byte); v4.20:drivers/char/nvram.c:EXPORT_SYMBOL(nvram_read_byte); v4.20:drivers/char/nvram.c:EXPORT_SYMBOL(__nvram_write_byte); v4.20:drivers/char/nvram.c:EXPORT_SYMBOL(nvram_write_byte); v4.20:drivers/char/nvram.c:EXPORT_SYMBOL(__nvram_check_checksum); v4.20:drivers/char/nvram.c:EXPORT_SYMBOL(nvram_check_checksum); ... $ git grep -wle "nvram_read_byte|nvram_write_byte|nvram_get_size|nvram_sync|__nvram_read_byte|__nvram_write_byte|__nvram_check_checksum" arch/powerpc/include/asm/machdep.h arch/powerpc/include/asm/nvram.h arch/powerpc/kernel/setup_32.c arch/powerpc/platforms/powermac/nvram.c drivers/char/generic_nvram.c drivers/char/nvram.c drivers/platform/x86/thinkpad_acpi.c drivers/scsi/atari_scsi.c drivers/video/fbdev/controlfb.c drivers/video/fbdev/imsttfb.c drivers/video/fbdev/matrox/matroxfb_base.c drivers/video/fbdev/platinumfb.c drivers/video/fbdev/valkyriefb.c include/linux/nvram.h sound/ppc/awacs.c $ --