linux-kernel - Re: [patch 3/4] mempolicy: add MPOL_F_STATIC

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Message-ID: <alpine.DEB.1.00.0802151229150.25583@chino.kir.corp.google.com>
Date:	Fri, 15 Feb 2008 12:32:25 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Paul Jackson <pj@....com>
cc:	akpm@...ux-foundation.org, clameter@....com,
	Lee.Schermerhorn@...com, ak@...e.de, linux-kernel@...r.kernel.org
Subject: Re: [patch 3/4] mempolicy: add MPOL_F_STATIC_NODES flag

On Fri, 15 Feb 2008, David Rientjes wrote:

> It would be possible to do all of this in both sys_set_mempolicy() and 
> sys_mbind() by masking off the set of possible modes and checking the 
> result for being >= MPOL_MAX:
> 
> 	if ((mode & MPOL_MODE_FLAGS) >= MPOL_MAX)
> 		return -EINVAL;

Actually, in sys_setmempolicy() or sys_mbind() where mode is an int:

	unsigned short flags;

	flags = mode & MPOL_MODE_FLAGS;
	mode &= ~MPOL_MODE_FLAGS;
	if (mode < 0 || mode >= MPOL_MAX)
		return -EINVAL;
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