From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/linux/delay.h | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 include/linux/delay.h (limited to 'include/linux/delay.h') diff --git a/include/linux/delay.h b/include/linux/delay.h new file mode 100644 index 000000000000..acb74865b973 --- /dev/null +++ b/include/linux/delay.h @@ -0,0 +1,50 @@ +#ifndef _LINUX_DELAY_H +#define _LINUX_DELAY_H + +/* + * Copyright (C) 1993 Linus Torvalds + * + * Delay routines, using a pre-computed "loops_per_jiffy" value. + */ + +extern unsigned long loops_per_jiffy; + +#include + +/* + * Using udelay() for intervals greater than a few milliseconds can + * risk overflow for high loops_per_jiffy (high bogomips) machines. The + * mdelay() provides a wrapper to prevent this. For delays greater + * than MAX_UDELAY_MS milliseconds, the wrapper is used. Architecture + * specific values can be defined in asm-???/delay.h as an override. + * The 2nd mdelay() definition ensures GCC will optimize away the + * while loop for the common cases where n <= MAX_UDELAY_MS -- Paul G. + */ + +#ifndef MAX_UDELAY_MS +#define MAX_UDELAY_MS 5 +#endif + +#ifdef notdef +#define mdelay(n) (\ + {unsigned long __ms=(n); while (__ms--) udelay(1000);}) +#else +#define mdelay(n) (\ + (__builtin_constant_p(n) && (n)<=MAX_UDELAY_MS) ? udelay((n)*1000) : \ + ({unsigned long __ms=(n); while (__ms--) udelay(1000);})) +#endif + +#ifndef ndelay +#define ndelay(x) udelay(((x)+999)/1000) +#endif + +void calibrate_delay(void); +void msleep(unsigned int msecs); +unsigned long msleep_interruptible(unsigned int msecs); + +static inline void ssleep(unsigned int seconds) +{ + msleep(seconds * 1000); +} + +#endif /* defined(_LINUX_DELAY_H) */ -- cgit v1.2.3