On Thu, Apr 09, 2020 at 03:35:40PM -0400, Mathieu Desnoyers wrote: > The macro include/linux/mmzone.h:get_pageblock_migratetype() uses > the symbol get_pfnblock_flags_mask, which is not exported. That macro is > used within the kmem and page_ref trace events to trace the migrate type > of the target page. > > Exporting this symbol to GPL modules allows GPL kernel tracers to be > implemented as modules. Which might make some sense if we had such intree modules (and then even some as we could have higher level functions). Without that is obviously is a no-go.
