Thread (7 messages) 7 messages, 4 authors, 2004-07-28

Re: Use of __pa() with CONFIG_NONLINEAR

From: Martin J. Bligh <hidden>
Date: 2004-07-28 20:16:57
Also in: lkml

On Wed, 2004-07-28 at 12:47, Martin J. Bligh wrote:
quoted
Can someone explain the necessity to create the new address space? We don't
need it with the current holes between nodes, and from my discssions with
Andy, I'm now unconvinced it's necessary.
Actually, the new address space is quite separated from what I'm
proposing here.  I'd prefer to discuss that part when we have an
implementation surrounding it.  I can explain it now if you'd like, but
it's going to be a bit harder with no code.  

The reason we need boot-time __{p,v}a() macros is really quite separate
from the new (logical) address space.  These new macros are just so we
can assume flat addressing during boot or compile-time, before any
nonlinear structures are set up.
Ah, OK ... makes more sense - thanks.

However ... what happens to functions calling __pa that are called from 
boot time and run time code?

M.

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