linux-kernel - Re: should there still be arch-specific 4KSTACKS support?

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Message-ID: <CAMuHMdXqieWY5C_C9ituryRwPSNDU__XL8X=g6EXF3-RH1DDdw@mail.gmail.com>
Date:	Sat, 23 Jun 2012 20:51:38 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	"Robert P. J. Day" <rpjday@...shcourse.ca>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux-Arch <linux-arch@...r.kernel.org>
Subject: Re: should there still be arch-specific 4KSTACKS support?

Broadening the audience...

On Sat, Jun 23, 2012 at 5:47 PM, Robert P. J. Day <rpjday@...shcourse.ca> wrote:
>  via some convoluted logic, i ended up doing the following search:
>
> $ grep -r 4KSTACKS *
> arch/sh/configs/r7785rp_defconfig:CONFIG_4KSTACKS=y
> arch/sh/Kconfig.debug:config 4KSTACKS
> arch/sh/include/asm/thread_info.h:#if defined(CONFIG_4KSTACKS)
> arch/mn10300/include/asm/thread_info.h:#ifdef CONFIG_4KSTACKS
> arch/m68k/Kconfig.machine:config 4KSTACKS
> arch/m68k/configs/m5208evb_defconfig:# CONFIG_4KSTACKS is not set
> arch/m68k/configs/m5275evb_defconfig:# CONFIG_4KSTACKS is not set
> arch/m68k/configs/m5475evb_defconfig:# CONFIG_4KSTACKS is not set
> arch/m68k/include/asm/thread_info.h:#ifdef CONFIG_4KSTACKS
> arch/c6x/include/asm/thread_info.h:#ifdef CONFIG_4KSTACKS
> drivers/lguest/interrupts_and_traps.c:   * Depending on the CONFIG_4KSTACKS option, the Guest can have one or
> kernel/lockdep.c:        * hardirq contexts (such as on 4KSTACKS), so only
> $
>
>  so even though 4KSTACKS support was officially removed in June of
> 2010:
>
> $ git show dcfa7262
>
> there's still traces of it, some of it obviously harmless, leftover
> cruft, but it would appear that both sh and m68k still provide a
> 4KSTACKS config option.
>
>  how much of that can be tossed as useless?

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
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