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Re: More than 512MB of memory

To: Rojhalat Ibrahim <>
Subject: Re: More than 512MB of memory
From: Ralf Baechle <>
Date: Wed, 9 Feb 2005 19:14:44 +0100
In-reply-to: <>
Original-recipient: rfc822;
References: <> <> <> <> <> <>
User-agent: Mutt/1.4.1i
On Wed, Feb 09, 2005 at 04:41:33PM +0100, Rojhalat Ibrahim wrote:

> Those messages actually go away when I do not
> define cpu_has_64bit_gp_regs, which is strange
> because the RM9000 definitely has 64bit gp regs.
> Any ideas?

cpu_has_64bit_gp_regs is meant to indicate "CPU has 64-bit registers and
it's actually safe to use them".  This is why it's defined as 0 for all
32-bit kernels where an interrupt would corrupt the upper 32-bits which
we don't save during any kind of exception.


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