next_parent      3176 kernel/events/core.c 	struct perf_event_context *parent, *next_parent;
next_parent      3193 kernel/events/core.c 	next_parent = rcu_dereference(next_ctx->parent_ctx);
next_parent      3196 kernel/events/core.c 	if (!parent && !next_parent)
next_parent      3199 kernel/events/core.c 	if (next_parent == ctx || next_ctx == parent || next_parent == parent) {