linux-kernel - Re: [PATCH v2 07/15] MIPS: IP27: clean out sn/nmi.h

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Message-ID: <20221108164139.GA3277@alpha.franken.de>
Date:   Tue, 8 Nov 2022 17:41:39 +0100
From:   Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To:     наб <nabijaczleweli@...ijaczleweli.xyz>
Cc:     Jonathan Corbet <corbet@....net>,
        Federico Vaga <federico.vaga@...a.pv.it>,
        Alex Shi <alexs@...nel.org>,
        Yanteng Si <siyanteng@...ngson.cn>,
        Hu Haowen <src.res@...il.cn>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-doc-tw-discuss@...ts.sourceforge.net,
        linux-mips@...r.kernel.org
Subject: Re: [PATCH v2 07/15] MIPS: IP27: clean out sn/nmi.h

On Tue, Nov 08, 2022 at 04:38:20PM +0100, наб wrote:
> On Fri, Nov 04, 2022 at 03:50:02PM +0100, Thomas Bogendoerfer wrote:
> > On Wed, Nov 02, 2022 at 12:05:30AM +0100, Ahelenia Ziemiańska wrote:
> > > The only user is arch/mips/sgi-ip27/ip27-nmi.c; this file was imported
> > > wholesale in 2.3.99pre9-1, and received only whitespace updates since
> > > then.
> > > 
> > > NMI_MAGIC isn't a magic number; it's unclear if it's actually used by
> > > the firmware in some capacity or if it's a holdover from copying the SGI
> > > code, but in the former case it's API and in the latter it's dead cruft.
> > 
> > it's used by firmware and Linux code to register the NMI exception
> > handler.
> Great, I'll put that in the message.
> 
> > Please leave arch/mips/include/asm/sn/nmi.h untouched as
> > it's documents firmware NMI handler usage (even when we don't use it, yet).
> "Yet".
> This file appeared in 2.3.99pre9-1, and hasn't changed since.
> I removed hard-coded assembly struct offsets, which we'll never use,
> because we /haven't/ used them, and this part is implemented in C.
> This file's my age, and these parts have been dead for just as long.
> 
> Yet.

it might be never used, but what's the problem with them ? Those
files came from IRIX and "document" the firmware interface. And me
as the MIPS maintainer wants to keep it there.

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]