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- #ifndef __ASM_GENERIC_DELAY_H
- #define __ASM_GENERIC_DELAY_H
- /* Undefined functions to get compile-time errors */
- extern void __bad_udelay(void);
- extern void __bad_ndelay(void);
- extern void __udelay(unsigned long usecs);
- extern void __ndelay(unsigned long nsecs);
- extern void __const_udelay(unsigned long xloops);
- extern void __delay(unsigned long loops);
- /*
- * The weird n/20000 thing suppresses a "comparison is always false due to
- * limited range of data type" warning with non-const 8-bit arguments.
- */
- /* 0x10c7 is 2**32 / 1000000 (rounded up) */
- #define udelay(n) \
- ({ \
- if (__builtin_constant_p(n)) { \
- if ((n) / 20000 >= 1) \
- __bad_udelay(); \
- else \
- __const_udelay((n) * 0x10c7ul); \
- } else { \
- __udelay(n); \
- } \
- })
- /* 0x5 is 2**32 / 1000000000 (rounded up) */
- #define ndelay(n) \
- ({ \
- if (__builtin_constant_p(n)) { \
- if ((n) / 20000 >= 1) \
- __bad_ndelay(); \
- else \
- __const_udelay((n) * 5ul); \
- } else { \
- __ndelay(n); \
- } \
- })
- #endif /* __ASM_GENERIC_DELAY_H */
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