Index: share/man/man9/ktr.9
===================================================================
--- share/man/man9/ktr.9
+++ share/man/man9/ktr.9
@@ -39,6 +39,8 @@
 .Vt "extern int ktr_verbose" ;
 .Vt "extern struct ktr_entry ktr_buf[]" ;
 .Ft void
+.Fn CTR "u_int mask" "char *format" "..."
+.Ft void
 .Fn CTR0 "u_int mask" "char *format"
 .Ft void
 .Fn CTR1 "u_int mask" "char *format" "arg1"
@@ -64,6 +66,8 @@
 .Xr ktrdump 8 .
 .Pp
 Events are created and logged in the kernel via the
+.Dv CTR
+and
 .Dv CTR Ns Ar x
 macros.
 The first parameter is a mask of event types
@@ -81,7 +85,7 @@
 style format string used to build the text of the event log message.
 Following the
 .Fa format
-string are zero to five arguments referenced by
+string are zero to six arguments referenced by
 .Fa format .
 Each event is logged with a file name and source line number of the
 originating CTR call, and a timestamp in addition to the log message.
@@ -91,7 +95,9 @@
 Do not use pointers to the objects with limited lifetime, for instance,
 strings, because the pointer may become invalid when buffer is printed.
 .Pp
-Note that the different macros differ only in the number of arguments each
+The
+.Dv CTR Ns Ar x
+macros differ only in the number of arguments each
 one takes, as indicated by its name.
 .Pp
 The
@@ -143,6 +149,11 @@
 .Bsx 3.0
 and was imported into
 .Fx 5.0 .
+.Pp
+The
+.Fn CTR
+macro accepting a variable number of arguments first appeared in
+.Fx 14.0 .
 .Sh BUGS
 Currently there is one global buffer shared among all CPUs.
 It might be profitable at some point in time to use per-CPU buffers instead
Index: sys/sys/ktr.h
===================================================================
--- sys/sys/ktr.h
+++ sys/sys/ktr.h
@@ -107,6 +107,13 @@
 #define	TR5(d, p1, p2, p3, p4, p5)	CTR5(KTR_GEN, d, p1, p2, p3, p4, p5)
 #define	TR6(d, p1, p2, p3, p4, p5, p6)	CTR6(KTR_GEN, d, p1, p2, p3, p4, p5, p6)
 
+#define	_KTR_MACRO(m, format, _1, _2, _3, _4, _5, _6, NAME, ...)	\
+	NAME
+#define	CTR(...)							\
+	_KTR_MACRO(__VA_ARGS__, CTR6, CTR5, CTR4, CTR3, CTR2, CTR1,	\
+	    CTR0)(__VA_ARGS__)
+#define	TR(...)				CTR(KTR_GEN, __VA_ARGS__)
+
 /*
  * The event macros implement KTR graphic plotting facilities provided
  * by src/tools/sched/schedgraph.py.  Three generic types of events are