Re: [PATCH] powerpc: Fix build error for vga16fb

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Hi Pranith,

On Mon, Aug 18, 2014 at 11:13 PM, Pranith Kumar <bobby.prani@xxxxxxxxx> wrote:
> Fix a build error caused by
>
> drivers/built-in.o: In function `vga16fb_probe':
> drivers/video/fbdev/vga16fb.c:1326: undefined reference to `vgacon_remap_base'
> drivers/video/fbdev/vga16fb.c:1326: undefined reference to `vgacon_remap_base'
> make: *** [vmlinux] Error 1
>
> This is occuring as vgacon_remap_base is exported only when
> CONFIG_VGA_CONSOLE=y. Fix the error by making FB_VBA16 depend on
> CONFIG_VGA_CONSOLE.
>
> Signed-off-by: Pranith Kumar <bobby.prani@xxxxxxxxx>
> Reported-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
> CC: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> ---
>  drivers/video/fbdev/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
> index e911b9c..09df564 100644
> --- a/drivers/video/fbdev/Kconfig
> +++ b/drivers/video/fbdev/Kconfig
> @@ -547,7 +547,7 @@ config FB_IMSTT
>
>  config FB_VGA16
>         tristate "VGA 16-color graphics support"
> -       depends on FB && (X86 || PPC)
> +       depends on FB && (X86 || PPC) && CONFIG_VGA_CONSOLE

The dependency on CONFIG_VGA_CONSOLE only exists on PPC, not on x86.
So this is not correct.

Digging a bit deeper: There's no code left in arch/powerpc that actually
sets vgacon_remap_base, so it's not gonna work anyway.
It seems vga16 support on PPC died with the removal of arch/ppc/.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

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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