[lttng-dev] [PATCH 01/11] mm: export vmalloc_sync_all symbol to GPL modules

[Christoph Hellwig]

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