30ab2b034f
Several architectures are using a common delay.h implementation that appears to have originated with the x86 architecture. This common implementation is a bit fuller than the current asm-generic version and has some compile-time checks that should be interesting for all architectures. This patch takes the common delay.h version and replaces the rather trivial asm-generic version with it. As no architecture was actually using asm-generic/delay.h, this change is rather innocuous; it will, however, allow us to switch at least four architectures over to using the asm-generic version. Signed-off-by: Jonas Bonn <jonas@southpole.se> Acked-by: Arnd Bergmann <arnd@arndb.de>
24 lines
740 B
C
24 lines
740 B
C
#ifndef __ASM_GENERIC_DELAY_H
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#define __ASM_GENERIC_DELAY_H
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/* Undefined functions to get compile-time errors */
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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 nsecs);
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extern void __const_udelay(unsigned long xloops);
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extern void __delay(unsigned long loops);
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/* 0x10c7 is 2**32 / 1000000 (rounded up) */
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#define udelay(n) (__builtin_constant_p(n) ? \
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((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \
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__udelay(n))
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/* 0x5 is 2**32 / 1000000000 (rounded up) */
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#define ndelay(n) (__builtin_constant_p(n) ? \
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((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \
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__ndelay(n))
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#endif /* __ASM_GENERIC_DELAY_H */
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