linux/include/asm-h8300/delay.h
Adrian Bunk 219576e127 [PATCH] include/asm-h8300/: "extern inline" -> "static inline"
"extern inline" generates a warning with -Wmissing-prototypes and I'm
currently working on getting the kernel cleaned up for adding this to the
CFLAGS since it will help us to avoid a nasty class of runtime errors.

If there are places that really need a forced inline, __always_inline would be
the correct solution.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:45 -08:00

38 lines
904 B
C

#ifndef _H8300_DELAY_H
#define _H8300_DELAY_H
#include <asm/param.h>
/*
* Copyright (C) 2002 Yoshinori Sato <ysato@sourceforge.jp>
*
* Delay routines, using a pre-computed "loops_per_second" value.
*/
static inline void __delay(unsigned long loops)
{
__asm__ __volatile__ ("1:\n\t"
"dec.l #1,%0\n\t"
"bne 1b"
:"=r" (loops):"0"(loops));
}
/*
* Use only for very small delays ( < 1 msec). Should probably use a
* lookup table, really, as the multiplications take much too long with
* short delays. This is a "reasonable" implementation, though (and the
* first constant multiplications gets optimized away if the delay is
* a constant)
*/
extern unsigned long loops_per_jiffy;
static inline void udelay(unsigned long usecs)
{
usecs *= 4295; /* 2**32 / 1000000 */
usecs /= (loops_per_jiffy*HZ);
if (usecs)
__delay(usecs);
}
#endif /* _H8300_DELAY_H */