arch/um/include/asm/delay.h

   1 #ifndef __UM_DELAY_H
   2 #define __UM_DELAY_H
   3
   4 #define MILLION 1000000
   5
   6 /* Undefined on purpose */
   7 extern void __bad_udelay(void);
   8
   9 extern void __udelay(unsigned long usecs);
  10 extern void __delay(unsigned long loops);
  11
  12 #define udelay(n) ((__builtin_constant_p(n) && (n) > 20000) ? \
  13         __bad_udelay() : __udelay(n))
  14
  15 /* It appears that ndelay is not used at all for UML, and has never been
  16  * implemented. */
  17 extern void __unimplemented_ndelay(void);
  18 #define ndelay(n) __unimplemented_ndelay()
  19
  20 #endif