linux-kernel - Re: [PATCH] remove PAGE_SIZE from headers

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Message-Id: <200707142140.l6ELefgh028149@harpo.it.uu.se>
Date:	Sat, 14 Jul 2007 23:40:41 +0200 (MEST)
From:	Mikael Pettersson <mikpe@...uu.se>
To:	hpa@...or.com, olaf@...fle.de
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] remove PAGE_SIZE from headers_install

On Sat, 14 Jul 2007 14:12:57 -0700, H. Peter Anvin wrote:
> Olaf Hering wrote:
> > Declare PAGE_SIZE as getpagesize() for userspace.
> > PAGE_SIZE is used in resource.h and shm.h
> 
> I would think it would be better to not define it at all.  Several
> architectures already don't have PAGE_SIZE visible to userspace in any way.

Furthermore, the kernel should /not/ export a would-be kernel
interface by defining it in terms of a non-kernel interface.
getpagesize() belongs to libc, and might not exist at all or
have that form.

Linux is not Solaris. There can be many different libcs in a system.

/Mikael
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