linux-kernel - Re: [PATCH 13/19] x86, mpx: Add temporary variable to reduce masking

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Message-ID: <alpine.DEB.2.11.1505182306460.4225@nanos>
Date:	Mon, 18 May 2015 23:07:05 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Dave Hansen <dave@...1.net>
cc:	linux-kernel@...r.kernel.org, x86@...nel.org,
	dave.hansen@...ux.intel.com
Subject: Re: [PATCH 13/19] x86, mpx: Add temporary variable to reduce
 masking

On Fri, 8 May 2015, Dave Hansen wrote:
> When we allocate a bounds table, we call mmap(), then add a
> "valid" bit to the value before storing it in to the bounds
> directory.
> 
> If we fail along the way, we go and mask that valid bit
> _back_ out.  That seems a little silly, and this makes it
> much more clear when we have a plain address versus an
> actual table _entry_.
> 
> Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>

Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
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