Power management fixes for v4.7-rc7 - Fix a recent performance regression on Power systems (powernv and pseries) introduced by a core cpuidle commit that decreased the precision of the last_residency conversion from nano- to microseconds, which should not matter in theory, but turned out to play not-so-well with the special "snooze" idle state on Power (Shreyas B Prabhu). - Fix a crash during resume from hibernation on x86-64 caused by possible corruption of the kernel text part of page tables in the last phase of image restoration exposed by a security-related change during the 4.3 development cycle (Rafael Wysocki).