arch/um/include/asm/delay.h at v3.2-rc2

tjh.dev / kernel

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

kernel / arch / um / include / asm / delay.h

at v3.2-rc2 18 lines 463 B view raw

wrap content

 1#ifndef __UM_DELAY_H
 2#define __UM_DELAY_H
 3
 4/* Undefined on purpose */
 5extern void __bad_udelay(void);
 6extern void __bad_ndelay(void);
 7
 8extern void __udelay(unsigned long usecs);
 9extern void __ndelay(unsigned long usecs);
10extern void __delay(unsigned long loops);
11
12#define udelay(n) ((__builtin_constant_p(n) && (n) > 20000) ? \
13	__bad_udelay() : __udelay(n))
14
15#define ndelay(n) ((__builtin_constant_p(n) && (n) > 20000) ? \
16	__bad_ndelay() : __ndelay(n))
17
18#endif