linux-kernel - Re: [PATCH] mm: provide a fallback for PAGE_KERNEL

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Message-ID: <CAMuHMdUpc6=j62E7Xrcid6tKU5FRUZsiSVK7J=KD09epQ=9xfA@mail.gmail.com>
Date:   Wed, 2 May 2018 12:08:57 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     "Luis R. Rodriguez" <mcgrof@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Greg KH <gregkh@...uxfoundation.org>,
        Linux-Arch <linux-arch@...r.kernel.org>,
        Linux FS Devel <linux-fsdevel@...r.kernel.org>,
        Linux MM <linux-mm@...ck.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>
Subject: Re: [PATCH] mm: provide a fallback for PAGE_KERNEL_RO for architectures

Hi Luis,

On Sat, Apr 28, 2018 at 2:15 AM, Luis R. Rodriguez <mcgrof@...nel.org> wrote:
> Some architectures do not define PAGE_KERNEL_RO, best we can do
> for them is to provide a fallback onto PAGE_KERNEL. Remove the
> hack from the firmware loader and move it onto the asm-generic
> header, and document while at it the affected architectures
> which do not have a PAGE_KERNEL_RO:
>
>   o alpha
>   o ia64
>   o m68k
>   o mips
>   o sparc64
>   o sparc
>
> Blessed-by: 0-day
> Signed-off-by: Luis R. Rodriguez <mcgrof@...nel.org>

I believe the "best we can do" is to add the missing definitions for the
architectures where the hardware does support it?

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