Merge 4.14.26 into android-4.14

Merge 4.14.26 into android-4.14

Changes in 4.14.26
	bpf: fix mlock precharge on arraymaps
	bpf: fix memory leak in lpm_trie map_free callback function
	bpf: fix rcu lockdep warning for lpm_trie map_free callback
	bpf, x64: implement retpoline for tail call
	bpf, arm64: fix out of bounds access in tail call
	bpf: add schedule points in percpu arrays management
	bpf: allow xadd only on aligned memory
	bpf, ppc64: fix out of bounds access in tail call
	KVM: x86: fix backward migration with async_PF
	Linux 4.14.26

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>