patch-2.4.0-test4 linux/include/asm-mips/param.h

• Lines: 76
• Date: Wed Jul 12 15:15:10 2000
• Orig file: v2.4.0-test3/linux/include/asm-mips/param.h
• Orig date: Mon Jul 10 16:47:26 2000

diff -u --recursive --new-file v2.4.0-test3/linux/include/asm-mips/param.h linux/include/asm-mips/param.h
@@ -1,37 +1,56 @@
-#ifndef __ASM_MIPS_PARAM_H
-#define __ASM_MIPS_PARAM_H
+#ifndef _ASM_PARAM_H
+#define _ASM_PARAM_H
 
 #ifndef HZ
 
+#ifdef __KERNEL__
+
+/* Safeguard against user stupidity  */
+#ifdef _SYS_PARAM_H
+#error Do not include <asm/param.h> with __KERNEL__ defined!
+#endif
+
 #include <linux/config.h>
 
 #ifdef CONFIG_DECSTATION
    /*
-    * log2(HZ), change this here if you want another
-    * HZ value. This is also used in dec_time_init.
-    * Minimum is 1, Maximum is 15.
+    * log2(HZ), change this here if you want another HZ value. This is also
+    * used in dec_time_init.  Minimum is 1, Maximum is 15.
     */
 #  define LOG_2_HZ 7
 #  define HZ (1 << LOG_2_HZ)
    /*
     * Ye olde division-by-multiplication trick.
-    *
     * This works only if 100 / HZ <= 1
     */
 #  define QUOTIENT ((1UL << (32 - LOG_2_HZ)) * 100)
-#  define HZ_TO_STD(a)                            \
+#  define hz_to_std(a)                            \
    ({ unsigned int __res;			  \
-      unsigned long lo;				  \
+      unsigned long __lo;			  \
         __asm__("multu\t%2,%3\n\t"		  \
-		:"=h" (__res), "=l" (lo)	  \
+		:"=h" (__res), "=l" (__lo)	  \
 		:"r" (a),"r" (QUOTIENT));         \
         (__typeof__(a)) __res;})
-#else
+
+#else /* Not a DECstation  */
+
+/* This is the internal value of HZ, that is the rate at which the jiffies
+   counter is increasing.  This value is independent from the external value
+   and can be changed in order to suit the hardware and application
+   requirements.  */
 #  define HZ 100
-#  define HZ_TO_STD(a) (a)
-#endif
+#  define hz_to_std(a) (a)
 
-#endif
+#endif /* Not a DECstation */
+
+#else /* defined(__KERNEL__)  */
+
+/* This is the external value of HZ as seen by user programs.  Don't change
+   unless you know what you're doing - changing breaks binary compatibility.  */
+#define HZ 100
+
+#endif /* defined(__KERNEL__)  */
+#endif /* defined(HZ)  */
 
 #define EXEC_PAGESIZE	4096
 
@@ -45,4 +64,4 @@
 
 #define MAXHOSTNAMELEN	64	/* max length of hostname */
 
-#endif /* __ASM_MIPS_PARAM_H */
+#endif /* _ASM_PARAM_H */