include/linux/delay.h

   1 #ifndef _LINUX_DELAY_H
   2 #define _LINUX_DELAY_H
   3
   4 /*
   5  * Copyright (C) 1993 Linus Torvalds
   6  *
   7  * Delay routines, using a pre-computed "loops_per_jiffy" value.
   8  */
   9
  10 <<<<<<< HEAD:include/linux/delay.h
  11 =======
  12 #include <linux/kernel.h>
  13
  14 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:include/linux/delay.h
  15 extern unsigned long loops_per_jiffy;
  16
  17 #include <asm/delay.h>
  18
  19 /*
  20  * Using udelay() for intervals greater than a few milliseconds can
  21  * risk overflow for high loops_per_jiffy (high bogomips) machines. The
  22  * mdelay() provides a wrapper to prevent this.  For delays greater
  23  * than MAX_UDELAY_MS milliseconds, the wrapper is used.  Architecture
  24  * specific values can be defined in asm-???/delay.h as an override.
  25  * The 2nd mdelay() definition ensures GCC will optimize away the
  26  * while loop for the common cases where n <= MAX_UDELAY_MS  --  Paul G.
  27  */
  28
  29 #ifndef MAX_UDELAY_MS
  30 #define MAX_UDELAY_MS   5
  31 #endif
  32
  33 #ifndef mdelay
  34 #define mdelay(n) (\
  35         (__builtin_constant_p(n) && (n)<=MAX_UDELAY_MS) ? udelay((n)*1000) : \
  36         ({unsigned long __ms=(n); while (__ms--) udelay(1000);}))
  37 #endif
  38
  39 #ifndef ndelay
  40 <<<<<<< HEAD:include/linux/delay.h
  41 #define ndelay(x)       udelay(((x)+999)/1000)
  42 =======
  43 static inline void ndelay(unsigned long x)
  44 {
  45         udelay(DIV_ROUND_UP(x, 1000));
  46 }
  47 #define ndelay(x) ndelay(x)
  48 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:include/linux/delay.h
  49 #endif
  50
  51 void calibrate_delay(void);
  52 void msleep(unsigned int msecs);
  53 unsigned long msleep_interruptible(unsigned int msecs);
  54
  55 static inline void ssleep(unsigned int seconds)
  56 {
  57         msleep(seconds * 1000);
  58 }
  59
  60 #endif /* defined(_LINUX_DELAY_H) */