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

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Date:	Sat, 14 Jul 2007 18:59:28 -0400
From:	"Mike Frysinger" <vapier.adi@...il.com>
To:	"Olaf Hering" <olaf@...fle.de>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] remove PAGE_SIZE from headers_install

On 7/14/07, Olaf Hering <olaf@...fle.de> wrote:
> On Sat, Jul 14, 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.
>
> i386 has it, so everyone uses it.

not anymore ... it's broken too many other architectures so anything
that matters has switched off of it

> asm/user.h uses it for NBPG, which appears in gdb configure scripts.
> Maybe it doesnt trigger there because the sysconf SC_* macros match.

the sourceware tree (binutils/gdb/etc...) bend over backwards to get a
usable definition so not having NBPG available is fine ... there's one
thing left which needs fixing and i have a patch that i need to commit
for that

> other places where asm/page.h is used:
> util-linux configure scripts, strace, xorg-11, and alot more.
> Have to check if they really need it.

those three packages you quote here i know have been fixed in the
latest versions
-mike
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