# Re: \[PATCH v3 5/6\] fbdev: Move framebuffer I/O helpers into \<asm/fb.h\>

- From: Sam Ravnborg \<hidden\>
- Date: 2023-05-03 19:03:40 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2023/05/2186861
- Thread: https://ratatoskr.run/linux-arch/2023/05/2185709/t.md

```text
Hi Thomas,

> > But I am missing something somewhere as I cannot see how this builds.
> > asm-generic now provide the fb_read/fb_write helpers.
> > But for example sparc has an architecture specifc fb.h so it will not
> > use the asm-generic variant. So I wonder how sparc get hold of the
> > asm-generic fb.h file?
> 
> All architecture's <asm/fb.h> files include <asm-generic/fb.h>, so that they
> all get the interfaces which they don't define themselves. For Sparc, this
> is at [1].
> 
> Best regards
> Thomas
> 
> 
> [1]
> https://cgit.freedesktop.org/drm/drm-tip/tree/arch/sparc/include/asm/fb.h#n19
> 
> > 
> > Maybe it is obvious, but I miss it.

OK, it was obvious and I missed it.
I looked at the mainline kernel, and not the drm-tip variant.
Sorry for the noise.

	Sam
```