linux-kernel - Re: [PATCH] ARM: head-common.S: Clear lr before jumping to start

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Message-ID: <CAMuHMdX7Z0D2unRqC9z04f0MVsxLuVxouvquyYBHKavnycfh=w@mail.gmail.com>
Date:   Sun, 15 Oct 2017 10:04:16 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
Cc:     Nicolas Pitre <nicolas.pitre@...aro.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Arnd Bergmann <arnd@...db.de>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Tony Lindgren <tony@...mide.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Chris Brandt <Chris.Brandt@...esas.com>,
        "linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] ARM: head-common.S: Clear lr before jumping to start_kernel()

On Sat, Oct 14, 2017 at 4:14 PM, Russell King - ARM Linux
<linux@...linux.org.uk> wrote:
> On Thu, Oct 12, 2017 at 11:25:50AM -0400, Nicolas Pitre wrote:
>> On Thu, 12 Oct 2017, Russell King - ARM Linux wrote:
>>
>> > On Tue, Oct 10, 2017 at 01:33:25PM -0700, Tony Lindgren wrote:
>> > > * Geert Uytterhoeven <geert@...ux-m68k.org> [171003 11:32]:
>> > > > On Tue, Oct 3, 2017 at 8:15 PM, Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>> > > > > On Tue, Oct 3, 2017 at 8:11 PM, Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>> > > > >> On Tue, Oct 3, 2017 at 5:37 PM, Nicolas Pitre <nicolas.pitre@...aro.org> wrote:
>> > > > >>> On Tue, 3 Oct 2017, Geert Uytterhoeven wrote:
>> > > > >>> Please send it to RMK's patch system.
>> > > > >>
>> > > > >> Done (I hope so ;-)
>> > > > >
>> > > > > Failed. Retrying.
>> > > >
>> > > > Yiha ;-)
>> > > >
>> > > > http://www.armlinux.org.uk/developer/patches/viewpatch.php?id=8702/1
>> > >
>> > > This also fixes the spamming I started seeing with next-20171009:
>> > >
>> > > Tested-by: Tony Lindgren <tony@...mide.com>
>> >
>> > It's all nice and good that people are testing this patch, but I can't
>> > apply it to -rc1, nor my "misc" branch.  It appears that this is due
>> > to patches going through other trees.
>> >
>> > Sorry, I can't take this patch.
>>
>> It should go into your devel-testing branch as this must be applied on
>> top of my xip_zdata branch that you merged there.
>
> Thanks, it would've been good to have known that ahead of time.
>
> It's why the patch system has the KernelVersion: tag:
>
>  6. Kernel version.
>     On a separate line, add a tag "KernelVersion: " followed by the kernel
>     version that the patch was generated against. This should be formatted
>     as "KernelVersion: 2.6.0-rmk1"
>
> This is because that information is relevant for knowing where it should
> be applied, and to which branch.  Having it be something else means I
> have to guess, and that can result in the patch being discarded in this
> manner if I don't find where it's supposed to be applied.

That's why we have the standard Fixes tag, which was included
Fixes: 9520b1a1b5f7a348 ("ARM: head-common.S: speed up startup code")

It's trivial for the repo maintainer to know which branch the fix to apply to,
given the Fixes tag.
It's non-trivial to know the branch for the patch submitter, who is forced to
use a non-standard patch submission system.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds