X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=include%2Fasm-i386%2Fdelay.h;h=9ae5e3782ed879dbd13b64df6aacdc186c998af9;hb=9e5e3162b2d5e4466187ecd63c9eec2de33cb7bc;hp=b1c7650dc7b9e1a841552b832a0d8a2badb6e7fb;hpb=55b4d6a52195a8f277ffddf755ddaff359878f41;p=linux-2.6-omap-h63xx.git

diff --git a/include/asm-i386/delay.h b/include/asm-i386/delay.h
index b1c7650dc7b..9ae5e3782ed 100644
--- a/include/asm-i386/delay.h
+++ b/include/asm-i386/delay.h
@@ -7,6 +7,7 @@
  * Delay routines calling functions in arch/i386/lib/delay.c
  */
  
+/* Undefined functions to get compile-time errors */
 extern void __bad_udelay(void);
 extern void __bad_ndelay(void);
 
@@ -15,10 +16,12 @@ extern void __ndelay(unsigned long nsecs);
 extern void __const_udelay(unsigned long usecs);
 extern void __delay(unsigned long loops);
 
+/* 0x10c7 is 2**32 / 1000000 (rounded up) */
 #define udelay(n) (__builtin_constant_p(n) ? \
 	((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \
 	__udelay(n))
-	
+
+/* 0x5 is 2**32 / 1000000000 (rounded up) */
 #define ndelay(n) (__builtin_constant_p(n) ? \
 	((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \
 	__ndelay(n))