this_cpu_ksoftirqd
if (this_cpu_ksoftirqd() == p) {
else if ((pc & SOFTIRQ_OFFSET) && curr != this_cpu_ksoftirqd())
if (refcount_read(&sk->sk_wmem_alloc) >= SKB_TRUESIZE(1) && this_cpu_ksoftirqd() == current)