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Pull perf/kprobes updates from Thomas Gleixner: "Make kretprobes lockless to avoid the rp->lock performance and potential lock ordering issues" * tag 'perf-kprobes-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: locking/atomics: Regenerate the atomics-check SHA1's kprobes: Replace rp->free_instance with freelist freelist: Implement lockless freelist asm-generic/atomic: Add try_cmpxchg() fallbacks kprobes: Remove kretprobe hash llist: Add nonatomic __llist_add() and __llist_dell_all()