Am Dienstag, den 28.07.2015, 10:02 +0200 schrieb Hans Verkuil:
> On 07/28/2015 09:55 AM, Philipp Zabel wrote:
> > If videobuf2-core is built as a module, the vb2 trace points must be
> > exported from videodev.o to avoid errors when linking videobuf2-core.
>
> I'm no tracepoint expert, so I'll just ask: if the tracepoint functionality
> is disabled in the kernel, will this still compile OK?
>
> That is, will the EXPORT_TRACEPOINT_SYMBOL_GPL() code disappear in that
> case or will it point to absent code/data?
No traces left if CONFIG_TRACEPOINTS not set. include/linux/tracepoint.h
contains:
#ifdef CONFIG_TRACEPOINTS
#define EXPORT_TRACEPOINT_SYMBOL_GPL(name) \
EXPORT_SYMBOL_GPL(__tracepoint_##name)
#else /* !CONFIG_TRACEPOINTS */
#define EXPORT_TRACEPOINT_SYMBOL_GPL(name)
#endif
regards
Philipp
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