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Fix delay() so that gcc4 does not optimize it into a noop. Lifted from the

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newsmips implementation by tsutsui@
This commit is contained in:
sekiya 2006-09-01 05:43:23 +00:00
parent 356f83eb40
commit bf3f4189a1
1 changed files with 7 additions and 9 deletions
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16
sys/arch/sgimips/sgimips/machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: machdep.c,v 1.96 2006/04/09 01:18:14 tsutsui Exp $ */
/* $NetBSD: machdep.c,v 1.97 2006/09/01 05:43:23 sekiya Exp $ */
/*
* Copyright (c) 2000 Soren S. Jorvang
@ -34,7 +34,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.96 2006/04/09 01:18:14 tsutsui Exp $");
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.97 2006/09/01 05:43:23 sekiya Exp $");
#include "opt_ddb.h"
#include "opt_kgdb.h"
@ -754,15 +754,13 @@ microtime(struct timeval *tvp)
splx(s);
}
inline void
delay(unsigned long n)
void delay(unsigned long n)
{
u_long i;
long divisor = curcpu()->ci_divisor_delay;
register int __N = curcpu()->ci_divisor_delay * n;
while (n-- > 0)
for (i = divisor; i > 0; i--)
;
do {
__asm("addiu %0,%1,-1" : "=r" (__N) : "0" (__N));
} while (__N > 0);
}
/*