diff -urN 2i/Makefile wt3/Makefile
--- 2i/Makefile	Thu Mar 28 22:24:25 2002
+++ wt3/Makefile	Thu Mar 28 22:25:31 2002
@@ -185,6 +185,7 @@
 DRIVERS-$(CONFIG_BLUEZ) += drivers/bluetooth/bluetooth.o
 DRIVERS-$(CONFIG_HOTPLUG_PCI) += drivers/hotplug/vmlinux-obj.o
 DRIVERS-$(CONFIG_ISDN_BOOL) += drivers/isdn/vmlinux-obj.o
+DRIVERS-$(CONFIG_KPERFCTR) += drivers/perfctr/kperfctr.o
 
 DRIVERS := $(DRIVERS-y)
 
--- ./fs/proc/base.c-orig	Sun Apr 28 01:29:14 2002
+++ ./fs/proc/base.c	Sun Apr 28 01:31:11 2002
@@ -25,6 +25,7 @@
 #include <linux/string.h>
 #include <linux/seq_file.h>
 #include <linux/namespace.h>
+#include <linux/perfctr.h>
 
 /*
  * For hysterical raisins we keep the same inumbers as in the old procfs.
@@ -540,6 +541,7 @@
 	PROC_PID_MAPS,
 	PROC_PID_CPU,
 	PROC_PID_MOUNTS,
+	PROC_PID_PERFCTR,
 	PROC_PID_FD_DIR = 0x8000,	/* 0x8000-0xffff */
 };
 
@@ -559,6 +561,9 @@
   E(PROC_PID_CWD,	"cwd",		S_IFLNK|S_IRWXUGO),
   E(PROC_PID_ROOT,	"root",		S_IFLNK|S_IRWXUGO),
   E(PROC_PID_EXE,	"exe",		S_IFLNK|S_IRWXUGO),
+#ifdef CONFIG_PERFCTR_VIRTUAL
+  E(PROC_PID_PERFCTR, "perfctr",	PERFCTR_PROC_PID_MODE),
+#endif
   E(PROC_PID_MOUNTS,	"mounts",	S_IFREG|S_IRUGO),
   {0,0,NULL,0}
 };