Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755213Ab3JCT2G (ORCPT ); Thu, 3 Oct 2013 15:28:06 -0400 Received: from mail-vb0-f42.google.com ([209.85.212.42]:49556 "EHLO mail-vb0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754789Ab3JCT2E (ORCPT ); Thu, 3 Oct 2013 15:28:04 -0400 MIME-Version: 1.0 In-Reply-To: <20131003142721.GB2781@console-pimps.org> References: <1380385403-31904-1-git-send-email-roy.franz@linaro.org> <1380385403-31904-3-git-send-email-roy.franz@linaro.org> <20131003095224.GX21381@console-pimps.org> <1380807804.17503.9.camel@deneb.redhat.com> <20131003142721.GB2781@console-pimps.org> Date: Thu, 3 Oct 2013 12:28:03 -0700 Message-ID: Subject: Re: [PATCH 2/6] Add shared update_fdt() function for ARM/ARM64 From: Roy Franz To: Matt Fleming Cc: Mark Salter , Linux Kernel Mailing List , linux-efi@vger.kernel.org, "linux-arm-kernel@lists.infradead.org" , matt.fleming@intel.com, Russell King - ARM Linux , Leif Lindholm , Grant Likely , Dave Martin Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2323 Lines: 57 On Thu, Oct 3, 2013 at 7:27 AM, Matt Fleming wrote: > On Thu, 03 Oct, at 09:43:24AM, Mark Salter wrote: >> On Thu, 2013-10-03 at 10:52 +0100, Matt Fleming wrote: >> > > +#if defined(CONFIG_ARM) || defined(CONFIG_ARM64) >> > > +static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt, >> > > + void *fdt, int new_fdt_size, char *cmdline_ptr, >> > > + u64 initrd_addr, u64 initrd_size, >> > > + efi_memory_desc_t *memory_map, >> > > + unsigned long map_size, unsigned long desc_size, >> > > + u32 desc_ver) >> > >> > Hmm... does this function really belong in efi-stub-helper.c? That file >> > should be for architecture independent functionality only. >> > >> >> It isn't really arm-specific although arm is the only user right now. >> We're using the FDT to pass EFI boot info that is passed in the boot >> params block on x86. So potentially other architectures could use the >> same code. > > It's not EFI-specific either, apart from the fdt property names. > >> How about making it someting like: >> >> #ifdef ARCH_NEEDS_EFI_FDT >> static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt, >> ... >> #endif >> >> so the architecture can decide whether to include it or not. > > Is one implementation of this function going to fit all architectures? > Can we be sure of that ahead of time? > > I'd prefer this to be kept in arch/ for now, and possibly moved into > efi-stub-helper.c at a later date if indeed it turns out to be generally > useful. > > -- > Matt Fleming, Intel Open Source Technology Center Hi Matt, This function is shared between ARM and ARM64, which are separate architectures so to keep this in arch code would require it to be duplicated for ARM/ARM64. Would moving this function to a new "efi-stub-fdt.c" file be satisfactory? This file would just be used the ARM and ARM64, so this would remove the need for the top-level #ifdefs. Thanks, Roy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/