linux-kernel - Re: [PATCH] MIPS: ralink: remove ralink

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Date:   Thu, 22 Mar 2018 12:34:06 +1100
From:   NeilBrown <neil@...wn.name>
To:     James Hogan <jhogan@...nel.org>
Cc:     John Crispin <john@...ozen.org>,
        Ralf Baechle <ralf@...ux-mips.org>, linux-mips@...ux-mips.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] MIPS: ralink: remove ralink_halt()

On Wed, Mar 21 2018, James Hogan wrote:

> On Tue, Mar 20, 2018 at 07:29:51PM +1100, NeilBrown wrote:
>> 
>> ralink_halt() does nothing that machine_halt()
>> doesn't already do, so it adds no value.
>> 
>> It actually causes incorrect behaviour due to the
>> "unreachable()" at the end.  This tell the compiler that the
>> end of the function will never be reached, which isn't true.
>> The compiler responds by not adding a 'return' instruction,
>> so control simply moves on to whatever bytes come afterwards
>> in memory.  In my tested, that was the ralink_restart()
>> function.  This means that an attempt to 'halt' the machine
>> would actually cause a reboot.
>> 
>> So remove ralink_halt() so that a 'halt' really does halt.
>> 
>> Signed-off-by: NeilBrown <neil@...wn.name>
>
> Thanks, I've cosmetically tweaked the commit message (mainly reflow to
> 72 characters) and added:
>
> Fixes: c06e836ada59 ("MIPS: ralink: adds reset code")
> Cc: <stable@...r.kernel.org> # 3.9+
>
> and applied for 4.16.
>
> BTW, I'm intrigued to know if there's a particular reason you don't
> author / sign-off as "Neil Brown"? Its supposed to be real names, though
> "NeilBrown" is hardly difficult to figure out so I don't actually
> object.

I started using NeilBrown way back when I was an undergrad student and
it stuck.  When you grow up as a Brown, you know your name isn't going
to make you unique. e.g. I'm not an author of "Red Hat Linux System
Administration Unleashed" (he has a space in his name!!).  So I chose a
different way to make my name distinctive.
Yes, it isn't technically compliant - you are the second person to
comment in the nearly twenty years I've been working on Linux :-)

Thanks,
NeilBrown

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