(2013/10/11 9:48), Tom Zanussi wrote:
> /**
> + * tracing_alloc_snapshot - allocate snapshot buffer.
> + *
> + * This only allocates the snapshot buffer if it isn't already
> + * allocated - it doesn't also take a snapshot.
> + *
> + * This is meant to be used in cases where the snapshot buffer needs
> + * to be set up for events that can't sleep but need to be able to
> + * trigger a snapshot.
> + */
> +int tracing_alloc_snapshot(void)
> +{
> + struct trace_array *tr = &global_trace;
> + int ret;
> +
> + ret = alloc_snapshot(tr);
> + WARN_ON(ret < 0);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(tracing_alloc_snapshot);
Out of curiously, why this symbol is exported to modules?
The functions which are called directly from trace_event macros
should be exported because those macros can be used in module code,
but I couldn't find this in such code, at a glance.
Thank you,
--
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu...@hitachi.com
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