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) {