DTRACE_PROC2
DTRACE_PROC2(signal__clear, int, 0, ksiginfo_t *, infop);
DTRACE_PROC2(signal__clear, int, 0, ksiginfo_t *, &info);
DTRACE_PROC2(signal__send, kthread_t *, t, int, sig);
DTRACE_PROC2(signal__send, kthread_t *, tt, int, sig);
DTRACE_PROC2(signal__clear, int, ret, ksiginfo_t *, infop);
DTRACE_PROC2(fault, int, fault, ksiginfo_t *, &siginfo);
DTRACE_PROC2(fault, int, fault, ksiginfo_t *, sip);