#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 */