From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Warren Subject: Re: [PATCH v2 4/6] ARM: tegra: rework fuse.c Date: Mon, 06 Jan 2014 13:50:42 -0700 Message-ID: <52CB1722.70306@wwwdotorg.org> References: <1387891931-9854-1-git-send-email-pdeschrijver@nvidia.com> <1387891931-9854-5-git-send-email-pdeschrijver@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1387891931-9854-5-git-send-email-pdeschrijver-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Peter De Schrijver Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Russell King , Thierry Reding , Herbert Xu , Prashant Gaikwad , Alexandre Courbot , Olof Johansson , Danny Huang List-Id: linux-tegra@vger.kernel.org On 12/24/2013 06:32 AM, Peter De Schrijver wrote: > Reduce fuse.c to the minimum functionality required for the early bootstages. > > Also export tegra_read_straps() for use by the fuse driver. Since the fuse driver is tristate, it could be a module. Doesn't it literally need to be EXPORT_SYMBOL'd, not simply not static? I'm rather worried that this series isn't bisectable, since this patch removes a bunch of code that's replaced by code in the fuse driver which can't be built/linked at this point in the series. I'm also worried about initialization ordering, since a lot of the fuse code could be a module... > diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c > -/* Tegra20 only */ > #define FUSE_UID_LOW 0x108 > #define FUSE_UID_HIGH 0x10c Why remove that comment but leave the two defines it applies to? > #define TEGRA20_FUSE_SPARE_BIT 0x200 That define, and tegra_spare_fuse() which uses it, are no longer used after patch 5/6, but aren't removed in patch 5/6. Perhaps it'd be better to squash or re-order the two patches, so this dead code can be removed? > -int tegra_sku_id; > -int tegra_cpu_process_id; > -int tegra_core_process_id; > int tegra_chip_id; > -int tegra_cpu_speedo_id; /* only exist in Tegra30 and later */ > -int tegra_soc_speedo_id; > enum tegra_revision tegra_revision; It's a bit odd to remove most of this, but leave a few parts hanging around. Wouldn't it be better to the drivers/misc/fuse code to export this, so that /all/ the fuse logic was there, rather than part of it being left over in arch/arm/? We'll need to fix that up anyway when we start using these globals on ARMv8, so may as well get it right now. Also, I rather think that the new drivers/misc/fuse code shouldn't be a module or driver, so that we can guarantee it's always there to provide the globals and that they are initialized early enough...