[PATCH V4 1/6] mm: Introduce a general RCU get_user_pages_fast.

[David Miller]

From: Steve Capper <steve.capper at linaro.org>
Date: Mon, 13 Oct 2014 12:44:28 +0100

> Also, as a heads up for Sparc. I don't see any definition of
> __get_user_pages_fast. Does this mean that a futex on THP tail page
> can cause an infinite loop?

I have no idea, I didn't realize this was required to be implemented.