linux-kernel - Re: [RFC PATCH v3 3/4] trace: Introduce trace log output function for STM

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Message-ID: <20150717164816.69015630@gandalf.local.home>
Date:	Fri, 17 Jul 2015 16:48:16 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Chunyan Zhang <zhang.chunyan@...aro.org>
Cc:	mingo@...hat.com, mathieu.poirier@...aro.org,
	serge.broslavsky@...aro.org, broonie@...nel.org,
	alexander.shishkin@...ux.intel.com, zhang.lyra@...il.com,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v3 3/4] trace: Introduce trace log output function
 for STM

On Tue,  7 Jul 2015 18:10:42 +0800
Chunyan Zhang <zhang.chunyan@...aro.org> wrote:

> +static int alloc_stm_trace_buffer(void)
> +{
> +	struct trace_buffer_stm *buffer;
> +
> +	buffer = kzalloc(sizeof(struct trace_buffer_stm), GFP_KERNEL);
> +	if (!buffer)
> +		return -ENOMEM;
> +
> +	buffer->used_len = 0;
> +	buffer->size = ARRAY_SIZE(buffer->buffer);
> +
> +	trace_event_stm_buffer = buffer;
> +
> +	return 0;
> +}
> +
> +static __init int trace_stm_init_buffers(void)
> +{
> +	if (alloc_stm_trace_buffer())
> +		return -ENOMEM;
> +
> +	if (alloc_stm_tmp_seq())

This needs to free trace_event_stm_buffer.

-- Steve

> +		return -ENOMEM;
> +
> +	stm_buffers_allocated = 1;
> +
> +	return 0;
> +}
> +fs_initcall(trace_stm_init_buffers);

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