diff options
Diffstat (limited to 'arch/um/include/asm/delay.h')
-rw-r--r-- | arch/um/include/asm/delay.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/um/include/asm/delay.h b/arch/um/include/asm/delay.h new file mode 100644 index 000000000000..c71e32b6741e --- /dev/null +++ b/arch/um/include/asm/delay.h | |||
@@ -0,0 +1,20 @@ | |||
1 | #ifndef __UM_DELAY_H | ||
2 | #define __UM_DELAY_H | ||
3 | |||
4 | #define MILLION 1000000 | ||
5 | |||
6 | /* Undefined on purpose */ | ||
7 | extern void __bad_udelay(void); | ||
8 | |||
9 | extern void __udelay(unsigned long usecs); | ||
10 | extern void __delay(unsigned long loops); | ||
11 | |||
12 | #define udelay(n) ((__builtin_constant_p(n) && (n) > 20000) ? \ | ||
13 | __bad_udelay() : __udelay(n)) | ||
14 | |||
15 | /* It appears that ndelay is not used at all for UML, and has never been | ||
16 | * implemented. */ | ||
17 | extern void __unimplemented_ndelay(void); | ||
18 | #define ndelay(n) __unimplemented_ndelay() | ||
19 | |||
20 | #endif | ||