linux-kernel - Re: [tip:sched/core] sched: Turn lock_task

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Date:	Wed, 15 Feb 2012 14:52:48 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	mingo@...hat.com, hpa@...or.com, anton.vorontsov@...aro.org,
	arve@...roid.com, linux-kernel@...r.kernel.org, san@...gle.com,
	ebiederm@...ssion.com, gregkh@...uxfoundation.org,
	paulmck@...ux.vnet.ibm.com, ccross@...roid.com,
	kosaki.motohiro@...il.com, oleg@...hat.com, tglx@...utronix.de,
	mingo@...e.hu
Cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:sched/core] sched: Turn lock_task_sighand() into a static
 inline

On Sat, 2012-02-11 at 15:10 -0800, tip-bot for Anton Vorontsov wrote:
> +static inline struct sighand_struct *lock_task_sighand(struct task_struct *tsk,
> +                                                      unsigned long *flags)
> +{
> +       struct sighand_struct *ret;
> +
> +       ret = __lock_task_sighand(tsk, flags);
> +       (void)__cond_lock(&tsk->sighand->siglock, ret);
> +       return ret;
> +} 

FWIW, I still really utterly detest __cond_lock(). Ideally someone would
teach sparse the conditional based on return thing and we could do the
function level annotation.
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