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diff --git a/sys/contrib/altq/altq/altq_rmclass_debug.h b/sys/contrib/altq/altq/altq_rmclass_debug.h
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+/* $KAME: altq_rmclass_debug.h,v 1.3 2002/11/29 04:36:24 kjc Exp $ */
+
+/*
+ * Copyright (c) Sun Microsystems, Inc. 1998 All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the SMCC Technology
+ * Development Group at Sun Microsystems, Inc.
+ *
+ * 4. The name of the Sun Microsystems, Inc nor may not be used to endorse or
+ * promote products derived from this software without specific prior
+ * written permission.
+ *
+ * SUN MICROSYSTEMS DOES NOT CLAIM MERCHANTABILITY OF THIS SOFTWARE OR THE
+ * SUITABILITY OF THIS SOFTWARE FOR ANY PARTICULAR PURPOSE. The software is
+ * provided "as is" without express or implied warranty of any kind.
+ *
+ * These notices must be retained in any copies of any part of this software.
+ */
+
+#ifndef _ALTQ_ALTQ_RMCLASS_DEBUG_H_
+#define _ALTQ_ALTQ_RMCLASS_DEBUG_H_
+
+/* #pragma ident "@(#)rm_class_debug.h 1.7 98/05/04 SMI" */
+
+/*
+ * Cbq debugging macros
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef CBQ_TRACE
+#ifndef NCBQTRACE
+#define NCBQTRACE (16 * 1024)
+#endif
+
+/*
+ * To view the trace output, using adb, type:
+ * adb -k /dev/ksyms /dev/mem <cr>, then type
+ * cbqtrace_count/D to get the count, then type
+ * cbqtrace_buffer,0tcount/Dp4C" "Xn
+ * This will dump the trace buffer from 0 to count.
+ */
+/*
+ * in ALTQ, "call cbqtrace_dump(N)" from DDB to display 20 events
+ * from Nth event in the circular buffer.
+ */
+
+struct cbqtrace {
+ int count;
+ int function; /* address of function */
+ int trace_action; /* descriptive 4 characters */
+ int object; /* object operated on */
+};
+
+extern struct cbqtrace cbqtrace_buffer[];
+extern struct cbqtrace *cbqtrace_ptr;
+extern int cbqtrace_count;
+
+#define CBQTRACEINIT() { \
+ if (cbqtrace_ptr == NULL) \
+ cbqtrace_ptr = cbqtrace_buffer; \
+ else { \
+ cbqtrace_ptr = cbqtrace_buffer; \
+ bzero((void *)cbqtrace_ptr, sizeof(cbqtrace_buffer)); \
+ cbqtrace_count = 0; \
+ } \
+}
+
+#define LOCK_TRACE() splimp()
+#define UNLOCK_TRACE(x) splx(x)
+
+#define CBQTRACE(func, act, obj) { \
+ int __s = LOCK_TRACE(); \
+ int *_p = &cbqtrace_ptr->count; \
+ *_p++ = ++cbqtrace_count; \
+ *_p++ = (int)(func); \
+ *_p++ = (int)(act); \
+ *_p++ = (int)(obj); \
+ if ((struct cbqtrace *)(void *)_p >= &cbqtrace_buffer[NCBQTRACE])\
+ cbqtrace_ptr = cbqtrace_buffer; \
+ else \
+ cbqtrace_ptr = (struct cbqtrace *)(void *)_p; \
+ UNLOCK_TRACE(__s); \
+ }
+#else
+
+/* If no tracing, define no-ops */
+#define CBQTRACEINIT()
+#define CBQTRACE(a, b, c)
+
+#endif /* !CBQ_TRACE */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ALTQ_ALTQ_RMCLASS_DEBUG_H_ */