status of drivers/misc/sgi-gru?

[Christoph Hellwig]

Hi dear ex-SGI folks,

do you know if the GRU driver is still maintained and in use?

Both Bharath and Jason have been posting changes to it that need
review, and I've just been discussing even more extensive mmu_notifier
changes with Jason that will require some very careful review.  If the
driver is still need I'd really like to hear your feedback.