linux-kernel - Re: linux-next: build failure after merge of the final tree (staging related)

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Date:	Wed, 15 Jun 2011 08:47:06 -0700
From:	Greg KH <greg@...ah.com>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>, brudley@...adcom.com,
	henryp@...adcom.com, rvossen@...adcom.com,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Linus <torvalds@...ux-foundation.org>,
	sparclinux@...r.kernel.org, Linux-Arch <linux-arch@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the final tree (staging
 related)

On Wed, Jun 15, 2011 at 02:05:29PM +0200, Geert Uytterhoeven wrote:
> On Fri, Jun 10, 2011 at 08:05, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> > On Thu, 9 Jun 2011 12:22:43 -0700 Greg KH <greg@...ah.com> wrote:
> >> On Thu, Jun 09, 2011 at 11:41:27AM -0700, Greg KH wrote:
> >> > > Also in several other files in drivers/staging/brcm80211/
> >> > >
> >> > > Also:
> >> > >
> >> > > drivers/staging/comedi/drivers.c: In function 'comedi_buf_alloc':
> >> > > drivers/staging/comedi/drivers.c:505:37: error: 'PAGE_KERNEL_NOCACHE' undeclared (first use in this function)
> 
> I have my doubts
> 
> #ifdef PAGE_KERNEL_NOCACHE
>                             vmap(pages, n_pages, VM_MAP, PAGE_KERNEL_NOCACHE);
> #else
>                             vmap(pages, n_pages, VM_MAP, PAGE_KERNEL);
> #endif
> 
> is the right "fix" for this...
> 
> BTW, PAGE_KERNEL_NOCACHE is defined on frv, m32r, mn10300, sh, and x86 only.
> 
> Strangely, both sparc and tile have
> 
> /*
>  * Some hardware wants to get fixmapped without caching.
>  */
> #define set_fixmap_nocache(idx, phys) \
>                 __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
> 
> in their <asm/fixmap.h>, without having PAGE_KERNEL_NOCACHE...

So, what should the correct fix here be?

confused,

greg k-h
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