linux-kernel - Re: [PATCH 1/4] core, x86: Add user return notifiers

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Message-ID: <4AB3CDEC.5050902@zytor.com>
Date:	Fri, 18 Sep 2009 11:14:04 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Avi Kivity <avi@...hat.com>
CC:	Ingo Molnar <mingo@...e.hu>, Marcelo Tosatti <mtosatti@...hat.com>,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] core, x86: Add user return notifiers

On 09/16/2009 05:45 AM, Avi Kivity wrote:
> Add a general per-cpu notifier that is called whenever the kernel is
> about to return to userspace.  The notifier uses a thread_info flag
> and existing checks, so there is no impact on user return or context
> switch fast paths.
> 
> Signed-off-by: Avi Kivity <avi@...hat.com>

The concept of this patch looks entirely sane, as does the code,
*except* for:

+#include <linux/user-return-notifier.h>

... missing header file, and ...

+obj-$(CONFIG_USER_RETURN_NOTIFIER) += user-return-notifier.o

... missing source file.

Could you fix the patch, please?

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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