linux-kernel - Re: [PATCH v2 01/19] fbdev: Prepare generic architecture helpers

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Date:   Thu, 06 Apr 2023 16:37:36 +0200
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Thomas Zimmermann" <tzimmermann@...e.de>,
        "Daniel Vetter" <daniel.vetter@...ll.ch>,
        "Helge Deller" <deller@....de>,
        "Javier Martinez Canillas" <javierm@...hat.com>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>
Cc:     Linux-Arch <linux-arch@...r.kernel.org>,
        linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-snps-arc@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-ia64@...r.kernel.org,
        loongarch@...ts.linux.dev, linux-m68k@...ts.linux-m68k.org,
        linux-mips@...r.kernel.org, linux-parisc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-sh@...r.kernel.org,
        sparclinux@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH v2 01/19] fbdev: Prepare generic architecture helpers

On Thu, Apr 6, 2023, at 16:30, Thomas Zimmermann wrote:
> Generic implementations of fb_pgprotect() and fb_is_primary_device()
> have been in the source code for a long time. Prepare the header file
> to make use of them.
>
> Improve the code by using an inline function for fb_pgprotect()
> and by removing include statements. The default mode set by
> fb_pgprotect() is now writecombine, which is what most platforms
> want.
>
> Symbols are protected by preprocessor guards. Architectures that
> provide a symbol need to define a preprocessor token of the same
> name and value. Otherwise the header file will provide a generic
> implementation. This pattern has been taken from <asm/io.h>.
>
> v2:
> 	*  use writecombine mappings by default (Arnd)
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@...e.de>

Acked-by: Arnd Bergmann <arnd@...db.de>