linux-kernel - Re: blackfin compile error

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Date:	Sat, 9 Feb 2008 02:53:40 +0800
From:	"Bryan Wu" <cooloney.lkml@...il.com>
To:	"Mike Frysinger" <vapier.adi@...il.com>
Cc:	"Robin Getz" <rgetz@...ckfin.uclinux.org>,
	"Matt Mackall" <mpm@...enic.com>, "Adrian Bunk" <bunk@...nel.org>,
	bryan.wu@...log.com,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"David Howells" <dhowells@...hat.com>
Subject: Re: blackfin compile error

On Feb 8, 2008 1:25 PM, Mike Frysinger <vapier.adi@...il.com> wrote:
>
> On Feb 6, 2008 2:12 PM, Robin Getz <rgetz@...ckfin.uclinux.org> wrote:
> > On Wed 6 Feb 2008 11:23, Matt Mackall pondered:
> > > On Wed, 2008-02-06 at 17:18 +0200, Adrian Bunk wrote:
> > > > Commit 698dd4ba6b12e34e1e432c944c01478c0b2cd773 broke blackfin:
> > > >
> > > > <--  snip  -->
> > > >
> > > > ...
> > > >   CC      mm/vmscan.o
> > > > In file included from
> > > > /home/bunk/linux/kernel-2.6/git/linux-2.6/mm/vmscan.c:44:
> > > > /home/bunk/linux/kernel-2.6/git/linux-2.6/include/linux/swapops.h: In function 'is_swap_pte':
> > > > /home/bunk/linux/kernel-2.6/git/linux-2.6/include/linux/swapops.h:48: error: implicit declaration of function 'pte_none'
> > > > /home/bunk/linux/kernel-2.6/git/linux-2.6/include/linux/swapops.h:48: error: implicit declaration of function 'pte_present'
> > > > make[2]: *** [mm/vmscan.o] Error 1
> > >
> > > This suggests that no one's tried to compile -mm on Blackfin since
> > > before September, I think.
> >
> > Or any other nommu arch's either, since looking at the include files, FRV
> > (when configured as noMMU) and m68knommu does not include it either...
> >
> > > Is there somewhere more appropriate to move it? I can't find one.
> > > Failing that, we can wrap it in CONFIG_MMU, I suppose.
> >
> > Or just add to the the following:
> >
> > ./include/asm-blackfin
> > ./include/asm-frv/ (only when configured as !MMU)
> > ./include/asm-h8300
> > ./include/asm-m68knommu
> > ./include/asm-v850
> >
> > Others seem to have it in include/asm-xxxxx/pgtable.h as #define, inline
> > function, or extern.
>
> looks like only MMU code currently uses the function, but to keep
> things nice, we may want something like:
> static inline int is_swap_pte(pte_t pte)
> {
> #ifdef CONFIG_MMU
>     return !pte_none(pte) && !pte_present(pte) && !pte_file(pte);
> #else
>     return 0;
> #endif
> }
>
> the header is also lacking an #include <asm/pgtable.h> at the top ...
> -mike
>

Did you submit a patch to mainline? It should be merged to fix this
compiling error.

Thanks a lot
-Bryan
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