runq: Fix printing status word bits

'rqsw_t' is 'unsigned long', strictly longer than integers on 64-bit
platforms.

While here, factor out the print format for a status word.

Fixes:          d2ac231616 ("Make the run queue parameters machine dependent...")
MFC after:      1 month
Event:          Kitchener-Waterloo Hackathon 202506
Sponsored by:   The FreeBSD Foundation

sys/kern/kern_switch.c

@@ -326,7 +326,9 @@ runq_sw_set_not_empty_op(int idx, int sw_idx, rqsw_t sw_bit, rqsw_t *swp)
 	rqsw_t old_sw __unused = *swp;
 
 	*swp |= sw_bit;
-	CTR4(KTR_RUNQ, "runq_sw_set_not_empty: idx=%d sw_idx=%d bits=%#x->%#x",
+	CTR4(KTR_RUNQ,
+	    "runq_sw_set_not_empty: idx=%d sw_idx=%d "
+	    "bits=" RQSW_PRI "->" RQSW_PRI,
 	    idx, sw_idx, old_sw, *swp);
 	return (0);
 }
@@ -349,7 +351,9 @@ runq_sw_set_empty_op(int idx, int sw_idx, rqsw_t sw_bit, rqsw_t *swp)
 	rqsw_t old_sw __unused = *swp;
 
 	*swp &= ~sw_bit;
-	CTR4(KTR_RUNQ, "runq_sw_set_empty: idx=%d sw_idx=%d bits=%#x->%#x",
+	CTR4(KTR_RUNQ,
+	    "runq_sw_set_empty: idx=%d sw_idx=%d "
+	    "bits=" RQSW_PRI "->" RQSW_PRI,
 	    idx, sw_idx, old_sw, *swp);
 	return (0);
 }
@@ -525,7 +529,8 @@ runq_findq(struct runq *const rq, const int lvl_min, const int lvl_max,
 		goto return_idx;
 	return (-1);
 return_idx:
-	CTR4(KTR_RUNQ, "runq_findq: bits=%#x->%#x i=%d idx=%d",
+	CTR4(KTR_RUNQ,
+	    "runq_findq: bits=" RQSW_PRI "->" RQSW_PRI " i=%d idx=%d",
 	    (*rqsw)[i], w, i, idx);
 	return (idx);
 }

sys/sys/runq.h

@@ -60,6 +60,7 @@ struct thread;
 
 typedef unsigned long	rqsw_t;		/* runq's status words type. */
 #define	RQSW_BPW	(sizeof(rqsw_t) * NBBY) /* Bits per runq word. */
+#define RQSW_PRI	"%#lx"		/* printf() directive. */
 
 /* Number of status words to cover RQ_NQS queues. */
 #define	RQSW_NB			(howmany(RQ_NQS, RQSW_BPW))