Index: alpha/alpha/conf.c
===================================================================
RCS file: /cvs/src/sys/arch/alpha/alpha/conf.c,v
retrieving revision 1.87
diff -u -p -r1.87 conf.c
--- alpha/alpha/conf.c	24 Jan 2020 14:11:01 -0000	1.87
+++ alpha/alpha/conf.c	6 Jul 2020 04:21:20 -0000
@@ -107,6 +107,7 @@ cdev_decl(fd);
 #include "cy.h"
 cdev_decl(cy);
 #include "ksyms.h"
+#include "kstat.h"
 
 /* USB Devices */
 #include "usb.h"
@@ -181,7 +182,7 @@ struct cdevsw	cdevsw[] =
 	cdev_usbdev_init(NUGEN,ugen),	/* 48: USB generic driver */
 	cdev_tty_init(NUCOM, ucom),	/* 49: USB tty */
 	cdev_notdef(),			/* 50 */
-	cdev_notdef(),			/* 51 */
+	cdev_kstat_init(NKSTAT,kstat),	/* 51: kernel statistics */
 #ifdef USER_PCICONF
 	cdev_pci_init(NPCI,pci),	/* 52: PCI user */
 #else
Index: amd64/amd64/conf.c
===================================================================
RCS file: /cvs/src/sys/arch/amd64/amd64/conf.c,v
retrieving revision 1.70
diff -u -p -r1.70 conf.c
--- amd64/amd64/conf.c	25 May 2020 06:37:52 -0000	1.70
+++ amd64/amd64/conf.c	6 Jul 2020 04:21:20 -0000
@@ -142,6 +142,7 @@ cdev_decl(cy);
 #include "pctr.h"
 #include "bktr.h"
 #include "ksyms.h"
+#include "kstat.h"
 #include "usb.h"
 #include "uhid.h"
 #include "fido.h"
@@ -238,7 +239,7 @@ struct cdevsw	cdevsw[] =
 	cdev_notdef(),			/* 48 */
 	cdev_bktr_init(NBKTR,bktr),     /* 49: Bt848 video capture device */
 	cdev_ksyms_init(NKSYMS,ksyms),	/* 50: Kernel symbols device */
-	cdev_notdef(),			/* 51 */
+	cdev_kstat_init(NKSTAT,kstat),	/* 51: Kernel statistics */
 	cdev_midi_init(NMIDI,midi),	/* 52: MIDI I/O */
 	cdev_notdef(),			/* 53 was: sequencer I/O */
 	cdev_notdef(),			/* 54 was: RAIDframe disk driver */
Index: arm/arm/conf.c
===================================================================
RCS file: /cvs/src/sys/arch/arm/arm/conf.c,v
retrieving revision 1.54
diff -u -p -r1.54 conf.c
--- arm/arm/conf.c	23 Jan 2020 02:40:21 -0000	1.54
+++ arm/arm/conf.c	6 Jul 2020 04:21:20 -0000
@@ -73,6 +73,7 @@
 #include "pty.h"
 #include "tun.h"
 #include "ksyms.h"
+#include "kstat.h"
 
 /*
  * APM interface
@@ -321,7 +322,7 @@ struct cdevsw cdevsw[] = {
 	cdev_notdef(),				/* 48: reserved */
 	cdev_notdef(),				/* 49: reserved */
 	cdev_notdef(),				/* 50: reserved */
-	cdev_notdef(),				/* 51: reserved */
+	cdev_kstat_init(NKSTAT,kstat),		/* 51: kernel statistics */
  	cdev_bio_init(NBIO,bio),		/* 52: ioctl tunnel */
 	cdev_notdef(),				/* 53: reserved */
 	cdev_notdef(),				/* 54 was FOOTBRIDGE console */
Index: arm64/arm64/conf.c
===================================================================
RCS file: /cvs/src/sys/arch/arm64/arm64/conf.c,v
retrieving revision 1.14
diff -u -p -r1.14 conf.c
--- arm64/arm64/conf.c	25 May 2020 06:37:52 -0000	1.14
+++ arm64/arm64/conf.c	6 Jul 2020 04:21:20 -0000
@@ -113,6 +113,7 @@ cdev_decl(spkr);
 #include "midi.h"
 #include "bktr.h"
 #include "ksyms.h"
+#include "kstat.h"
 #include "usb.h"
 #include "uhid.h"
 #include "fido.h"
@@ -198,7 +199,7 @@ struct cdevsw	cdevsw[] =
 	cdev_notdef(),			/* 48 */
 	cdev_bktr_init(NBKTR,bktr),     /* 49: Bt848 video capture device */
 	cdev_ksyms_init(NKSYMS,ksyms),	/* 50: Kernel symbols device */
-	cdev_notdef(),			/* 51 */
+	cdev_kstat_init(NKSTAT,kstat),	/* 51: kernel statistics */
 	cdev_midi_init(NMIDI,midi),	/* 52: MIDI I/O */
 	cdev_notdef(),			/* 53 was: sequencer I/O */
 	cdev_notdef(),			/* 54 was: RAIDframe disk driver */
Index: hppa/hppa/conf.c
===================================================================
RCS file: /cvs/src/sys/arch/hppa/hppa/conf.c,v
retrieving revision 1.69
diff -u -p -r1.69 conf.c
--- hppa/hppa/conf.c	24 Jan 2020 14:11:01 -0000	1.69
+++ hppa/hppa/conf.c	6 Jul 2020 04:21:20 -0000
@@ -91,6 +91,7 @@ int	nblkdev = nitems(bdevsw);
 #include "tun.h"
 
 #include "ksyms.h"
+#include "kstat.h"
 
 #include "lpt.h"
 cdev_decl(lpt);
@@ -178,7 +179,7 @@ struct cdevsw   cdevsw[] =
 	cdev_notdef(),			/* 48: */
 	cdev_notdef(),			/* 49: */
 	cdev_notdef(),			/* 50: */
-	cdev_notdef(),			/* 51: */
+	cdev_ksyms_init(NKSTAT,kstat),	/* 51: kernel statistics */
 	cdev_notdef(),			/* 52: */
 	cdev_notdef(),			/* 53: */
 	cdev_vscsi_init(NVSCSI,vscsi),	/* 54: vscsi */
Index: i386/i386/conf.c
===================================================================
RCS file: /cvs/src/sys/arch/i386/i386/conf.c,v
retrieving revision 1.169
diff -u -p -r1.169 conf.c
--- i386/i386/conf.c	25 May 2020 06:37:53 -0000	1.169
+++ i386/i386/conf.c	6 Jul 2020 04:21:20 -0000
@@ -136,6 +136,7 @@ cdev_decl(cy);
 #include "bios.h"
 #include "bktr.h"
 #include "ksyms.h"
+#include "kstat.h"
 #include "usb.h"
 #include "uhid.h"
 #include "fido.h"
@@ -231,7 +232,7 @@ struct cdevsw	cdevsw[] =
 	cdev_ocis_init(NBIOS,bios),	/* 48: onboard BIOS PROM */
 	cdev_bktr_init(NBKTR,bktr),     /* 49: Bt848 video capture device */
 	cdev_ksyms_init(NKSYMS,ksyms),	/* 50: Kernel symbols device */
-	cdev_notdef(),			/* 51 */
+	cdev_kstat_init(NKSTAT,kstat),	/* 51: kernel statistics */
 	cdev_midi_init(NMIDI,midi),	/* 52: MIDI I/O */
 	cdev_notdef(),			/* 53 was: sequencer I/O */
 	cdev_notdef(),			/* 54 was: RAIDframe disk driver */
Index: landisk/landisk/conf.c
===================================================================
RCS file: /cvs/src/sys/arch/landisk/landisk/conf.c,v
retrieving revision 1.41
diff -u -p -r1.41 conf.c
--- landisk/landisk/conf.c	23 Jan 2020 02:40:21 -0000	1.41
+++ landisk/landisk/conf.c	6 Jul 2020 04:21:20 -0000
@@ -73,6 +73,7 @@
 #include "pty.h"
 #include "tun.h"
 #include "ksyms.h"
+#include "kstat.h"
 
 /*
  * Disk/Filesystem pseudo-devices
@@ -295,7 +296,7 @@ struct cdevsw cdevsw[] = {
 	cdev_notdef(),				/* 48: reserved */
 	cdev_notdef(),				/* 49: reserved */
 	cdev_notdef(),				/* 50: reserved */
-	cdev_notdef(),				/* 51: reserved */
+	cdev_kstat_init(NKSTAT,kstat),		/* 51: kernel statistics */
 	cdev_notdef(),				/* 52: reserved */
 	cdev_notdef(),				/* 53: reserved */
 	cdev_notdef(),				/* 54: reserved */
Index: loongson/loongson/conf.c
===================================================================
RCS file: /cvs/src/sys/arch/loongson/loongson/conf.c,v
retrieving revision 1.28
diff -u -p -r1.28 conf.c
--- loongson/loongson/conf.c	23 Jan 2020 02:40:21 -0000	1.28
+++ loongson/loongson/conf.c	6 Jul 2020 04:21:20 -0000
@@ -108,6 +108,7 @@ cdev_decl(wd);
 #include "audio.h"
 #include "video.h"
 #include "ksyms.h"
+#include "kstat.h"
 
 #include "wsdisplay.h"
 #include "wskbd.h"
@@ -188,7 +189,7 @@ struct cdevsw	cdevsw[] =
 	cdev_notdef(),			/* 48: */
 	cdev_bio_init(NBIO,bio),	/* 49: ioctl tunnel */
 	cdev_notdef(),			/* 50: */
-	cdev_notdef(),			/* 51: */
+	cdev_kstat_init(NKSTAT,kstat),	/* 51: kernel statistics */
 	cdev_ptm_init(NPTY,ptm),	/* 52: pseudo-tty ptm device */
 	cdev_notdef(),			/* 53: */
 	cdev_notdef(),			/* 54: */
Index: luna88k/luna88k/conf.c
===================================================================
RCS file: /cvs/src/sys/arch/luna88k/luna88k/conf.c,v
retrieving revision 1.33
diff -u -p -r1.33 conf.c
--- luna88k/luna88k/conf.c	23 Jan 2020 02:40:21 -0000	1.33
+++ luna88k/luna88k/conf.c	6 Jul 2020 04:21:20 -0000
@@ -54,6 +54,7 @@
 #include "wd.h"
 
 #include "ksyms.h"
+#include "kstat.h"
 
 #include "audio.h"
 #include "com.h"
@@ -153,7 +154,7 @@ struct cdevsw	cdevsw[] =
 	cdev_notdef(),			/* 48 */
 	cdev_bio_init(NBIO,bio),	/* 49: ioctl tunnel */
 	cdev_notdef(),			/* 50 */
-	cdev_notdef(),			/* 51 */
+	cdev_kstat_init(NKSTAT,kstat),	/* 51: kernel statistics */
 	cdev_ptm_init(NPTY,ptm),	/* 52: pseudo-tty ptm device */
 	cdev_vscsi_init(NVSCSI,vscsi),	/* 53: vscsi */
 	cdev_disk_init(1,diskmap),	/* 54: disk mapper */
Index: macppc/macppc/conf.c
===================================================================
RCS file: /cvs/src/sys/arch/macppc/macppc/conf.c,v
retrieving revision 1.71
diff -u -p -r1.71 conf.c
--- macppc/macppc/conf.c	23 Jan 2020 02:40:21 -0000	1.71
+++ macppc/macppc/conf.c	6 Jul 2020 04:21:20 -0000
@@ -94,6 +94,7 @@ cdev_decl(com);
 #include "tun.h"
 
 #include "ksyms.h"
+#include "kstat.h"
 #include "usb.h"
 #include "uhid.h"
 #include "fido.h"
@@ -181,7 +182,7 @@ struct cdevsw cdevsw[] = {
 	cdev_notdef(),			/* 48 */
 	cdev_notdef(),			/* 49 */
 	cdev_notdef(),			/* 50 */
-	cdev_notdef(),			/* 51 */
+	cdev_kstat_init(NKSTAT,kstat),	/* 51: kernel statistics */
 	cdev_midi_init(NMIDI,midi),	/* 52: MIDI I/O */
 	cdev_notdef(),			/* 53 was: sequencer I/O */
 	cdev_notdef(),			/* 54 was: RAIDframe disk driver */
Index: octeon/octeon/conf.c
===================================================================
RCS file: /cvs/src/sys/arch/octeon/octeon/conf.c,v
retrieving revision 1.24
diff -u -p -r1.24 conf.c
--- octeon/octeon/conf.c	23 Jan 2020 02:40:21 -0000	1.24
+++ octeon/octeon/conf.c	6 Jul 2020 04:21:20 -0000
@@ -121,6 +121,7 @@ cdev_decl(octcf);
 cdev_decl(amdcf);
 
 #include "ksyms.h"
+#include "kstat.h"
 
 #include "wsdisplay.h"
 #include "wskbd.h"
@@ -207,7 +208,7 @@ struct cdevsw	cdevsw[] =
 	cdev_notdef(),			/* 48: */
 	cdev_bio_init(NBIO,bio),	/* 49: ioctl tunnel */
 	cdev_notdef(),			/* 50: */
-	cdev_notdef(),			/* 51: */
+	cdev_kstat_init(NKSTAT,kstat),	/* 51: kernel statistics */
 	cdev_ptm_init(NPTY,ptm),	/* 52: pseudo-tty ptm device */
 	cdev_fuse_init(NFUSE,fuse),	/* 53: fuse */
 	cdev_notdef(),			/* 54: */
Index: powerpc64/powerpc64/conf.c
===================================================================
RCS file: /cvs/src/sys/arch/powerpc64/powerpc64/conf.c,v
retrieving revision 1.7
diff -u -p -r1.7 conf.c
--- powerpc64/powerpc64/conf.c	29 Jun 2020 21:16:45 -0000	1.7
+++ powerpc64/powerpc64/conf.c	6 Jul 2020 04:21:20 -0000
@@ -68,6 +68,7 @@ cdev_decl(com);
 #include "ipmi.h"
 #include "kcov.h"
 #include "ksyms.h"
+#include "kstat.h"
 #include "lpt.h"
 cdev_decl(lpt);
 #include "midi.h"
@@ -115,7 +116,7 @@ struct cdevsw cdevsw[] =
 	cdev_random_init(1,random),	/* 12: random data source */
 	cdev_dt_init(NDT,dt),		/* 13: dynamic tracer */
 	cdev_kcov_init(NKCOV,kcov),	/* 14: kcov */
-	cdev_notdef(),			/* 15 */
+	cdev_kstat_init(NKSTAT,kstat),	/* 15: kernel statistics */
 	cdev_notdef(),			/* 16 */
 	cdev_notdef(),			/* 17 */
 	cdev_notdef(),			/* 18 */
Index: sgi/sgi/conf.c
===================================================================
RCS file: /cvs/src/sys/arch/sgi/sgi/conf.c,v
retrieving revision 1.42
diff -u -p -r1.42 conf.c
--- sgi/sgi/conf.c	23 Jan 2020 02:40:21 -0000	1.42
+++ sgi/sgi/conf.c	6 Jul 2020 04:21:20 -0000
@@ -107,6 +107,7 @@ cdev_decl(wd);
 #include "audio.h"
 #include "video.h"
 #include "ksyms.h"
+#include "kstat.h"
 
 #include "wsdisplay.h"
 #include "wskbd.h"
@@ -187,7 +188,7 @@ struct cdevsw	cdevsw[] =
 	cdev_notdef(),			/* 48: */
 	cdev_bio_init(NBIO,bio),	/* 49: ioctl tunnel */
 	cdev_notdef(),			/* 50: */
-	cdev_notdef(),			/* 51: */
+	cdev_kstat_init(NKSTAT,kstat),	/* 51: kernel statistics */
 	cdev_ptm_init(NPTY,ptm),	/* 52: pseudo-tty ptm device */
 	cdev_notdef(),			/* 53: */
 	cdev_notdef(),			/* 54: */
Index: sparc64/sparc64/conf.c
===================================================================
RCS file: /cvs/src/sys/arch/sparc64/sparc64/conf.c,v
retrieving revision 1.83
diff -u -p -r1.83 conf.c
--- sparc64/sparc64/conf.c	23 Jan 2020 02:40:22 -0000	1.83
+++ sparc64/sparc64/conf.c	6 Jul 2020 04:21:20 -0000
@@ -112,6 +112,7 @@ cdev_decl(pci);
 #include "pf.h"
 
 #include "ksyms.h"
+#include "kstat.h"
 
 #include "hotplug.h"
 #include "vscsi.h"
@@ -203,7 +204,7 @@ struct cdevsw	cdevsw[] =
 	cdev_notdef(),			/* 48 */
 	cdev_notdef(),			/* 49 */
 	cdev_notdef(),			/* 50 */
-	cdev_notdef(),			/* 51 */
+	cdev_kstat_init(NKSTAT,kstat),	/* 51: kernel statistics */ 
 #ifdef USER_PCICONF
 	cdev_pci_init(NPCI,pci),	/* 52: PCI user */
 #else