linux-kernel - Re: [PATCH v3 7/9] trace: use this_cpu

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Message-ID: <0000013ae6cfb10f-87b4a0ea-98fe-4269-a834-9ebb64fe61fa-000000@email.amazonses.com>
Date:	Fri, 9 Nov 2012 20:15:02 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Shan Wei <shanwei88@...il.com>
cc:	rostedt@...dmis.org, fweisbec@...il.com,
	Kernel-Maillist <linux-kernel@...r.kernel.org>, mingo@...hat.com
Subject: Re: [PATCH v3 7/9] trace: use this_cpu_ptr per-cpu helper

On Fri, 9 Nov 2012, Shan Wei wrote:

> -	return buffer->buffer;
> +	return (char *)this_cpu_ptr(&percpu_buffer->buffer);
>  }

Add a comment to explain the cast?

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