[PATCH 0/2] kuser helpers documentation cleanup and 64-bit cmpxchg

[Nicolas Pitre]

This series cleans up the kuser documentation, then it adds 64-bit
cmpxchg support as needed by some user space applications.

[PATCH 1/2] ARM: kuser: move interface documentation out of the source code
[PATCH 2/2] ARM: add a kuser_cmpxchg64 user space helper