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

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Message-Id: <20110413160455.D72E.A69D9226@jp.fujitsu.com>
Date:	Wed, 13 Apr 2011 16:04:54 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	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>,
	Russell King <linux@....linux.org.uk>
Subject: Re: mm: convert vma->vm_flags to 64bit

> On Wed, Apr 13, 2011 at 09:13:03AM +0900, KOSAKI Motohiro wrote:
> > > On Tue, 2011-04-12 at 14:06 +0300, Alexey Dobriyan wrote:
> > > > On Tue, Apr 12, 2011 at 10:12 AM, KOSAKI Motohiro
> > > > <kosaki.motohiro@...fujitsu.com> wrote:
> > > > > After next year? All developers don't have to ignore compiler warnings!
> > > > 
> > > > At least add vm_flags_t which is sparse-checked, just like we do with gfp_t.
> > > > 
> > > > VM_SAO is ppc64 only, so it could be moved into high part,
> > > > freeing 1 bit?
> > > 
> > > My original series did use a type, I don't know what that was dropped,
> > > it made conversion easier imho.
> > 
> > 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?

Ben's patch had arch-dependent size.



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