linux-kernel - Re: [Linux-fbdev-devel] [PATCH 10/10] [HEADS UP] fbdev: Move arch-specific bits to their respective subdirectories

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Message-ID: <Pine.LNX.4.64.0705171140230.20754@anakin>
Date:	Thu, 17 May 2007 11:43:34 +0200 (CEST)
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Linux Fbdev development list 
	<linux-fbdev-devel@...ts.sourceforge.net>
Cc:	Andrew Morton <akpm@...l.org>,
	Linux Kernel Development <linux-kernel@...r.kernel.org>,
	Linux/m68k <linux-m68k@...r.kernel.org>,
	uClinux list <uclinux-dev@...inux.org>
Subject: Re: [Linux-fbdev-devel] [PATCH 10/10] [HEADS UP] fbdev: Move
 arch-specific bits to their respective subdirectories

On Thu, 16 May 2007, Antonino A. Daplas wrote:
> diff --git a/include/asm-m68k/fb.h b/include/asm-m68k/fb.h
> new file mode 100644
> index 0000000..7d4a28f
> --- /dev/null
> +++ b/include/asm-m68k/fb.h
> @@ -0,0 +1,28 @@
> +#ifndef _ASM_FB_H_
> +#define _ASM_FB_H_
> +
> +#include <linux/fs.h>
> +#include <asm/page.h>
> +#include <asm/setup.h>
> +
> +#ifdef CONFIG_SUN3
> +static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma)
> +{
> +	pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
> +}
> +#elif defined(CONFIG_MMU)
   ^^^^^^^^^^^^^^^^^^^^^^^^^
This can be a plain `#else', as m68knommu hasn't been merged with m68k
(yet :-)

> +static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma)
> +	if (CPU_IS_020_OR_030)
> +		pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
> +	if (CPU_IS_040_OR_060) {
> +		pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
> +		/* Use no-cache mode, serialized */
> +		pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
> +	}
> +}
> +#else
   ^^^^^
So this branch can go away

> +#warning What do we have to do here??
> +#define fb_pgprotect(...) do {} while (0)
> +#endif /* CONFIG_SUN3 */
> +
> +#endif /* _ASM_FB_H_ */
> diff --git a/include/asm-m68knommu/fb.h b/include/asm-m68knommu/fb.h
> new file mode 100644
> index 0000000..dc9d1be
> --- /dev/null
> +++ b/include/asm-m68knommu/fb.h
> @@ -0,0 +1,7 @@
> +#ifndef _ASM_FB_H_
> +#define _ASM_FB_H_
> +
> +#warning What do we have to do here??
> +#define fb_pgprotect(...) do {} while (0)
> +
> +#endif /* _ASM_FB_H_ */

If the m68knommu case in fb_mmap() was empty before, it should be empty here
too, so I guess the warning can go away.

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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