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060e352236
This patch cleans up the delay implementations a bit, makes the loops unoptimizable, and exports __udelay and __const_udelay. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: <viro@parcelfarce.linux.theplanet.co.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
42 lines
711 B
C
42 lines
711 B
C
/*
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* Copyright 2003 PathScale, Inc.
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* Copied from arch/x86_64
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*
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* Licensed under the GPL
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <asm/processor.h>
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#include <asm/param.h>
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void __delay(unsigned long loops)
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{
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unsigned long i;
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for(i = 0; i < loops; i++)
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cpu_relax();
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}
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void __udelay(unsigned long usecs)
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{
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unsigned long i, n;
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n = (loops_per_jiffy * HZ * usecs) / MILLION;
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for(i=0;i<n;i++)
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cpu_relax();
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}
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EXPORT_SYMBOL(__udelay);
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void __const_udelay(unsigned long usecs)
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{
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unsigned long i, n;
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n = (loops_per_jiffy * HZ * usecs) / MILLION;
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for(i=0;i<n;i++)
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cpu_relax();
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}
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EXPORT_SYMBOL(__const_udelay);
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