4 #define MILLION 1000000
6 /* Undefined on purpose */
7 extern void __bad_udelay(void);
9 extern void __udelay(unsigned long usecs);
10 extern void __delay(unsigned long loops);
12 #define udelay(n) ((__builtin_constant_p(n) && (n) > 20000) ? \
13 __bad_udelay() : __udelay(n))
15 /* It appears that ndelay is not used at all for UML, and has never been
17 extern void __unimplemented_ndelay(void);
18 #define ndelay(n) __unimplemented_ndelay()