void perf_swevent_put_recursion_context(int rctx)
{
	struct swevent_htable *swhash = this_cpu_ptr(&swevent_htable);

	put_recursion_context(swhash->recursion, rctx);
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.