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Re: Aliasing in pgtable-bits.h (CONFIG_64BIT_PHYS_ADDR)

To: Hartvig Ekner <>
Subject: Re: Aliasing in pgtable-bits.h (CONFIG_64BIT_PHYS_ADDR)
From: Ralf Baechle <>
Date: Tue, 8 Apr 2003 23:47:35 +0200
Cc: Linux MIPS mailing list <>
In-reply-to: <>; from on Tue, Apr 08, 2003 at 09:06:24AM +0200
Original-recipient: rfc822;
References: <>
User-agent: Mutt/
On Tue, Apr 08, 2003 at 09:06:24AM +0200, Hartvig Ekner wrote:

> #define _PAGE_R4KBUG                (1<<0)  /* workaround for r4k bug  */
> #define _PAGE_GLOBAL                (1<<0)
> Is the aliasing between R4KBUG & GLOBAL intentional? This is the only CONFIG 
> case where it
> is done. Superficially, I can't see R4KBUG used anywhere, so maybe it doesn't 
> matter. But
> if R4KBUG truly isn't used, why not consider removing it entirely from all 
> PTE layouts?

It's there for a R4000 bug workaround waiting to be finally written by
somebody ...


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