linux-kernel - Re: [PATCH v2 5/9] kernel: padata : use this_cpu

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Message-ID: <20121103082455.GB20868@secunet.com>
Date:	Sat, 3 Nov 2012 09:24:55 +0100
From:	Steffen Klassert <steffen.klassert@...unet.com>
To:	Shan Wei <shanwei88@...il.com>
Cc:	Kernel-Maillist <linux-kernel@...r.kernel.org>,
	linux-crypto@...r.kernel.org, cl@...ux-foundation.org
Subject: Re: [PATCH v2 5/9] kernel: padata : use this_cpu_read per-cpu helper

>  
> @@ -204,8 +204,7 @@ static struct padata_priv *padata_get_next(struct parallel_data *pd)
>  		goto out;
>  	}
>  
> -	queue = per_cpu_ptr(pd->pqueue, smp_processor_id());
> -	if (queue->cpu_index == next_queue->cpu_index) {
> +	if (this_cpu_read(pd->pqueue->cpu_index) == next_queue->cpu_index) {

This runs with bottom halves off, so we can use __this_cpu_read here.
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