mirror of https://gitee.com/openkylin/linux.git
19 lines
463 B
C
19 lines
463 B
C
#ifndef __UM_DELAY_H
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#define __UM_DELAY_H
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/* Undefined on purpose */
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extern void __bad_udelay(void);
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extern void __bad_ndelay(void);
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extern void __udelay(unsigned long usecs);
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extern void __ndelay(unsigned long usecs);
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extern void __delay(unsigned long loops);
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#define udelay(n) ((__builtin_constant_p(n) && (n) > 20000) ? \
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__bad_udelay() : __udelay(n))
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#define ndelay(n) ((__builtin_constant_p(n) && (n) > 20000) ? \
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__bad_ndelay() : __ndelay(n))
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#endif
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