include/asm-i386/delay.h

   1 #ifndef _I386_DELAY_H
   2 #define _I386_DELAY_H
   3
   4 /*
   5  * Copyright (C) 1993 Linus Torvalds
   6  *
   7  * Delay routines calling functions in arch/i386/lib/delay.c
   8  */
   9
  10 extern void __udelay(unsigned long usecs);
  11 extern void __const_udelay(unsigned long usecs);
  12 extern void __delay(unsigned long loops);
  13
  14 #define udelay(n) (__builtin_constant_p(n) ? \
  15         __const_udelay((n) * 0x10c6ul) : \
  16         __udelay(n))
  17
  18 #endif /* defined(_I386_DELAY_H) */