linux-kernel - Re: [PATCH -V4 02/10] hugetlbfs: don't use ERR_PTR with VM

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Message-ID: <877gyhksec.fsf@linux.vnet.ibm.com>
Date:	Mon, 19 Mar 2012 12:07:47 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	linux-mm@...ck.org, mgorman@...e.de, dhillf@...il.com,
	aarcange@...hat.com, mhocko@...e.cz, akpm@...ux-foundation.org,
	hannes@...xchg.org, linux-kernel@...r.kernel.org,
	cgroups@...r.kernel.org
Subject: Re: [PATCH -V4 02/10] hugetlbfs: don't use ERR_PTR with VM_FAULT* values

On Mon, 19 Mar 2012 11:11:56 +0900, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:
> (2012/03/17 2:39), Aneesh Kumar K.V wrote:
> 
> > From: "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
> > 
> > Using VM_FAULT_* codes with ERR_PTR will require us to make sure
> > VM_FAULT_* values will not exceed MAX_ERRNO value.
> > 
> > Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
> 
> 
> Is this a bug fix ?

No. Currently the values of VM_FAULT_* codes are all below MAX_ERRNO. The
changes in the patch are done based on the suggestion from Andrew. 

http://article.gmane.org/gmane.linux.kernel.cgroups/1160

> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> 
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