Oracle offering DTrace for Linux

Posted Feb 24, 2012 0:51 UTC (Fri) by mathstuf (subscriber, #69389)
In reply to: Oracle offering DTrace for Linux by lambda
Parent article: Oracle offering DTrace for Linux

If you look at this[1] comment, it isn't a proper diff. The kernel that DTrace is based on didn't export print_context_stack at all and their patches exported it as non-GPL, whereas more recently, kernel developers exported it as GPL. A grep through the 2.6.32.57 tarball doesn't show print_context_stack being exported at all, so this seems, to me, to be taken out of context.

[1]https://lwn.net/Articles/483322/

Oracle offering DTrace for Linux

Posted Feb 24, 2012 13:49 UTC (Fri) by vonbrand (subscriber, #4458) [Link] (1 responses)

AFAIU, there are three cases here:

Not exported: For in-kernel use only; use is automatically GPLed
EXPORT_SYMBOL: For use in modules; just using it doesn't make your module GPLed
EXPORT_SYMBOL_GPL: For use in GPLed modules

If it wasn't exported, it's the first case; adding EXPORT_SYMBOL is shady.

Oracle offering DTrace for Linux

Posted Feb 24, 2012 21:14 UTC (Fri) by mathstuf (subscriber, #69389) [Link]

I would imagine if it still weren't exported today, there would be discussion of making it non-GPL enforcing export for merging. I imagine other symbols gained an EXPORT_SYMBOL after being unexported for a time. In any case, it seems a moot point since (apparently) the 0.2 version obeys the EXPORT_SYMBOL_GPL.