The HZ kernel constant is not the same on all platforms. The procps library
seems to need it's value however, it estimates it by measuring during a second.
This patch publishes the HZ value in /proc/sys/kernel/hz for the convenience
of tools that need it's value.

--- linux/include/linux/sysctl.h.sysctlhz	Sun May 27 14:12:56 2001
+++ linux/include/linux/sysctl.h	Mon Jul 16 11:12:45 2001
@@ -118,7 +118,9 @@
 	KERN_SHMPATH=48,	/* string: path to shm fs */
 	KERN_HOTPLUG=49,	/* string: path to hotplug policy agent */
 	KERN_IEEE_EMULATION_WARNINGS=50, /* int: unimplemented ieee instructions */
-	KERN_S390_USER_DEBUG_LOGGING=51  /* int: dumps of user faults */
+	KERN_S390_USER_DEBUG_LOGGING=51, /* int: dumps of user faults */
+
+	KERN_HZ=60		/* compiled in HZ value */
 };
 
 
--- linux/kernel/sysctl.c.sysctlhz	Thu Apr 12 21:20:31 2001
+++ linux/kernel/sysctl.c	Mon Jul 16 14:54:27 2001
@@ -16,6 +16,7 @@
  *  Wendling.
  * The list_for_each() macro wasn't appropriate for the sysctl loop.
  *  Removed it and replaced it with older style, 03/23/00, Bill Wendling
+ * Added hz (HZ), 07/16/01, Rolf Fokkens
  */
 
 #include <linux/config.h>
@@ -153,6 +154,8 @@
 	{0}
 };
 
+static int hz_value = HZ;
+
 static ctl_table kern_table[] = {
 	{KERN_OSTYPE, "ostype", system_utsname.sysname, 64,
 	 0444, NULL, &proc_doutsstring, &sysctl_string},
@@ -249,6 +252,8 @@
 	{KERN_S390_USER_DEBUG_LOGGING,"userprocess_debug",
 	 &sysctl_userprocess_debug,sizeof(int),0644,NULL,&proc_dointvec},
 #endif
+	{KERN_HZ, "hz", &hz_value,sizeof(int),
+	 0444, NULL, &proc_dointvec},
 	{0}
 };