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

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Date:	Sat, 19 Sep 2009 09:40:58 +0300
From:	Avi Kivity <avi@...hat.com>
To:	"H. Peter Anvin" <hpa@...or.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 09/18/2009 09:14 PM, H. Peter Anvin wrote:
> 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?
>
>    

Doh.  Sent out fixed patch.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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