linux-kernel - Re: mm: convert vma->vm

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Message-ID: <20110413072935.GK7806@n2100.arm.linux.org.uk>
Date:	Wed, 13 Apr 2011 08:29:35 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Alexey Dobriyan <adobriyan@...il.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>, Hugh Dickins <hughd@...gle.com>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Paul Mundt <lethal@...ux-sh.org>
Subject: Re: mm: convert vma->vm_flags to 64bit

On Wed, Apr 13, 2011 at 05:00:49PM +1000, Benjamin Herrenschmidt wrote:
> On Wed, 2011-04-13 at 09:44 +0300, Alexey Dobriyan wrote:
> > > Yes, I take Hugh's version because vm_flags_t is ugly to me. And
> > arch 
> > > dependent variable size is problematic.
> > 
> > Who said it should have arch-dependent size? 
> 
> Right, it shouldn't. My original patch did that to avoid thinking about
> archs that manipulated it from asm such as ARM but that wasn't the right
> thing to do. But that doesn't invalidate having a type.

No, we don't manipulate it.  We only test for VM_EXEC in it in asm.
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