Merge branch 'linus' into locking/core, to resolve conflict

Conflicts:
	arch/arm/include/asm/percpu.h

As Stephen Rothwell noted, there's a conflict between this commit
in locking/core:

  a21ee605 ("lockdep: Change hardirq{s_enabled,_context} to per-cpu variables")

and this fresh upstream commit:

  aa54ea90 ("ARM: percpu.h: fix build error")

a21ee605 is a simpler solution to the dependency problem and doesn't
further increase header hell - so this conflict resolution effectively
reverts aa54ea90 and uses the a21ee605 solution.

Signed-off-by: Ingo Molnar <mingo@kernel.org>