Add fatal_signal_pending
[linux-2.6/mini2440.git] / include / linux / delay.h
blob17ddb55430ae19c28704a3da24f230b7a2e2ff6a
1 #ifndef _LINUX_DELAY_H
2 #define _LINUX_DELAY_H
4 /*
5 * Copyright (C) 1993 Linus Torvalds
7 * Delay routines, using a pre-computed "loops_per_jiffy" value.
8 */
10 extern unsigned long loops_per_jiffy;
12 #include <asm/delay.h>
15 * Using udelay() for intervals greater than a few milliseconds can
16 * risk overflow for high loops_per_jiffy (high bogomips) machines. The
17 * mdelay() provides a wrapper to prevent this. For delays greater
18 * than MAX_UDELAY_MS milliseconds, the wrapper is used. Architecture
19 * specific values can be defined in asm-???/delay.h as an override.
20 * The 2nd mdelay() definition ensures GCC will optimize away the
21 * while loop for the common cases where n <= MAX_UDELAY_MS -- Paul G.
24 #ifndef MAX_UDELAY_MS
25 #define MAX_UDELAY_MS 5
26 #endif
28 #ifndef mdelay
29 #define mdelay(n) (\
30 (__builtin_constant_p(n) && (n)<=MAX_UDELAY_MS) ? udelay((n)*1000) : \
31 ({unsigned long __ms=(n); while (__ms--) udelay(1000);}))
32 #endif
34 #ifndef ndelay
35 #define ndelay(x) udelay(((x)+999)/1000)
36 #endif
38 void calibrate_delay(void);
39 void msleep(unsigned int msecs);
40 unsigned long msleep_interruptible(unsigned int msecs);
42 static inline void ssleep(unsigned int seconds)
44 msleep(seconds * 1000);
47 #endif /* defined(_LINUX_DELAY_H) */