Date: Thu, 19 May 2005 13:47:11 +0100 (BST)
From: "Maciej W. Rozycki" <macro@linux-mips.org>
To: Arjan van de Ven <arjan@infradead.org>
Cc: linux-os@analogic.com, Adrian Bunk <bunk@stusta.de>,
       Kyle Moffett <mrmacman_g4@mac.com>, "Gilbert, John" <JGG@dolby.com>,
       linux-kernel@vger.kernel.org
Subject: Re: Illegal use of reserved word in system.h
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On Thu, 19 May 2005, Arjan van de Ven wrote:

> > First off, I think we need a system-call that will return some of
> > the information that now comes from headers. PAGE_SIZE comes to
> > mind. You need this for mmap() but there doesn't seem to be any
> > way to get it. getpagesize() 'C' library just returns something
> > it's swiped from kernel headers when the library was compiled.
> > There are other things like the following that sometimes need
> 
> for getpagesize() I can see the point

 If that is the case, then that's a bug in that C library, which should be 
reported and fixed.  When starting a program, i.e. as a result of 
execve(), Linux passes the current page size in use in the auxiliary 
vector.  That value should be retrieved and used by a C library for 
platforms that support various page sizes and returned by library calls 
like getconf().  For example glibc gets it right.

  Maciej
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