linux-kernel - Re: [PATCH 1/3] context_tracking: remove duplicate enabled check

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Message-ID: <563DC692.5030502@redhat.com>
Date:	Sat, 7 Nov 2015 10:38:26 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	kvm list <kvm@...r.kernel.org>,
	Andy Lutomirski <luto@...nel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Rik van Riel <riel@...hat.com>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>
Subject: Re: [PATCH 1/3] context_tracking: remove duplicate enabled check



On 28/10/2015 06:19, Andy Lutomirski wrote:
> On Tue, Oct 27, 2015 at 6:39 PM, Paolo Bonzini <pbonzini@...hat.com> wrote:
>> All calls to context_tracking_enter and context_tracking_exit
>> are already checking context_tracking_is_enabled, except the
>> context_tracking_user_enter and context_tracking_user_exit
>> functions left in for the benefit of assembly calls.
>>
>> Pull the check up to those functions, by making them simple
>> wrappers around the user_enter and user_exit inline functions.
> 
> This makes my brain hurt.  Assuming that this survives a boot with
> CONFIG_CONTEXT_TRACKING_FORCE=y and CONFIG_PROVE_LOCKING=y (with the
> implied CONFIG_PROVE_RCU), then:
> 
> Acked-by: Andy Lutomirski <luto@...nel.org>

Tested now.

Paolo
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