config update
hrtimer: Introduce effective timer slack
mm: pmd_read_atomic: fix 32bit PAE pmd walk vs pmd_populate SMP race
raid5: delayed stripe fix
Optimized ARM RWSEM algorithm - Thanks to faux123

Conflicts:
	kernel/arch/arm/include/asm/rwsem.h
fs: switch do_fsync() to fget_light()
timekeeping: utilize the suspend-nonstop clocksource to count suspend
workqueue: cond_resched() after processing each work item
jbd2: optimize jbd2_journal_force_commit
ext4: speed up truncate/unlink by not using bforget() unless needed
af_unix: speedup /proc/net/unix
redo some commits, for better stability