sys/intr: remove questionable interrupt report

The "???" interrupt doesn't appear useful any more, so remove it.

Differential Revision: https://reviews.freebsd.org/D37869

Author: ehem

sys/powerpc/powerpc/intr_machdep.c

@@ -166,7 +166,7 @@ intr_init_sources(void *arg __unused)
 
 	powerpc_intrs = mallocarray(num_io_irqs, sizeof(*powerpc_intrs),
 	    M_INTR, M_WAITOK | M_ZERO);
-	nintrcnt = 1 + mp_ncpus * 2;
+	nintrcnt = mp_ncpus * 2;
 #ifdef COUNT_IPIS
 	if (mp_ncpus > 1)
 		nintrcnt += 8 * mp_ncpus;
@@ -175,9 +175,6 @@ intr_init_sources(void *arg __unused)
 	    M_ZERO);
 	intrnames = mallocarray(nintrcnt, INTRNAME_LEN, M_INTR, M_WAITOK |
 	    M_ZERO);
-
-	intrcnt_setname("???", 0);
-	intrcnt_index = 1;
 }
 /*
  * This needs to happen before SI_SUB_CPU

sys/x86/x86/intr_machdep.c

@@ -171,12 +171,11 @@ intr_init_sources(void *arg)
 #endif
 
 	/*
-	 * - 1 ??? dummy counter.
 	 * - 1 counter for each CPU for lapic timer.
 	 * - 1 counter for each CPU for hypervisor drivers.
 	 * - 8 counters for each CPU for IPI counters for SMP.
 	 */
-	nintrcnt = 1 + mp_ncpus * 2;
+	nintrcnt = mp_ncpus * 2;
 #ifdef COUNT_IPIS
 	if (mp_ncpus > 1)
 		nintrcnt += 8 * mp_ncpus;
@@ -186,9 +185,6 @@ intr_init_sources(void *arg)
 	intrnames = mallocarray(nintrcnt, INTRNAME_LEN, M_INTR, M_WAITOK |
 	    M_ZERO);
 
-	intrcnt_setname("???", 0);
-	intrcnt_index = 1;
-
 	/*
 	 * NB: intrpic_lock is not held here to avoid LORs due to
 	 * malloc() in intr_register_source().  However, we are still