dotraplinkage void do_coprocessor_error(struct pt_regs *regs, long error_code)
{
	RCU_LOCKDEP_WARN(!rcu_is_watching(), "entry code didn't wake RCU");
	math_error(regs, error_code, X86_TRAP_MF);
}

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.