linux-kernel - Re: [patch] do_no

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Message-Id: <20060920084638.900c9a69.rdunlap@xenotime.net>
Date:	Wed, 20 Sep 2006 08:46:38 -0700
From:	"Randy.Dunlap" <rdunlap@...otime.net>
To:	Jes Sorensen <jes@....com>
Cc:	Linus Torvalds <torvalds@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	bjorn_helgaas@...com, Nick Piggin <nickpiggin@...oo.com.au>,
	Andrew Morton <akpm@...l.org>, Robin Holt <holt@....com>,
	Dean Nelson <dcn@....com>, Hugh Dickins <hugh@...itas.com>
Subject: Re: [patch] do_no_pfn()

On 20 Sep 2006 03:25:25 -0400 Jes Sorensen wrote:

>  include/linux/mm.h |    7 +++++
>  mm/memory.c        |   62 ++++++++++++++++++++++++++++++++++++++++++++++++-----
>  2 files changed, 64 insertions(+), 5 deletions(-)
> 
> Index: linux-2.6/include/linux/mm.h
> ===================================================================
> --- linux-2.6.orig/include/linux/mm.h
> +++ linux-2.6/include/linux/mm.h

> @@ -625,6 +626,12 @@ static inline int page_mapped(struct pag
>  #define NOPAGE_OOM	((struct page *) (-1))
>  
>  /*
> + * Error return values for the *_nopfn functions
> + */
> +#define NOPFN_SIGBUS	((unsigned long) -1)
> +#define NOPFN_OOM	((unsigned long) -2)

Is there any difference in the above and

#define NOPFN_SIGBUS		-1UL
#define NOPFN_OOM		-2UL

?
---
~Randy
-
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