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Re: pgd_init() Patch

To: Jun Sun <jsun@mvista.com>
Subject: Re: pgd_init() Patch
From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Mon, 28 Jan 2002 21:26:24 +0100 (MET)
Cc: Phil Thompson <phil@river-bank.demon.co.uk>, Linux/MIPS Development <linux-mips@oss.sgi.com>
In-reply-to: <3C55AEEA.EC76C0D4@mvista.com>
Sender: owner-linux-mips@oss.sgi.com
On Mon, 28 Jan 2002, Jun Sun wrote:
> Geert Uytterhoeven wrote:
> > On Mon, 28 Jan 2002, Phil Thompson wrote:
> > > Should USER_PTRS_PER_PGD be defined as (TASK_SIZE/PGDIR_SIZE) + 1?
> > 
> > You mean ((TASK_SIZE)+1)/PGDIR_SIZE?
> > 
> 
> No.  It should be
> 
> +#define USER_PTRS_PER_PGD      ((TASK_SIZE-1)/PGDIR_SIZE + 1)
> 
> Mathmatically, 
> 
> USER_PTRS_PER_PGD=ceil(TASK_SIZE/PGDIR_SIZE)

OK, ((TASK_SIZE+PGDIR_SIZE-1)/PGDIR_SIZE) in that case :-)

Gr{oetje,eeting}s,

                                                Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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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