Re: [PATCH 01/11] mm: export vmalloc_sync_all symbol to GPL modules

Greg KH
2011-12-01T22:14:24Z

On Thu, Dec 01, 2011 at 04:57:00PM -0500, Christoph Hellwig wrote:
> On Thu, Dec 01, 2011 at 04:41:13PM -0500, Mathieu Desnoyers wrote:
> > LTTng needs this symbol exported. It calls it to ensure its tracing
> > buffers and allocated data structures never trigger a page fault. This
> > is required to handle page fault handler tracing and NMI tracing
> > gracefully.
>
> We:
>
> a) don't export symbols unless they have an intree-user

lttng is now in-tree in the drivers/staging/ area. See linux-next for
details if you are curious.

> b) especially don't export something as lowlevel as this one.

Mathieu, there's nothing else you can do to get this information? Or
does lttng really want such lowlevel data?

thanks,

greg k-h