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Add assertion for refcount overflow.

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Submitted by:	Andrey Zonov <andrey zonov.org>
Reviewed by:	kib
This commit is contained in:
Gleb Smirnoff 2012-07-27 09:16:48 +00:00
parent 48cbf1ba5b
commit be6ab406bd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=238828
1 changed files with 2 additions and 0 deletions
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sys/sys/refcount.h
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@ -32,6 +32,7 @@
#ifndef __SYS_REFCOUNT_H__
#define __SYS_REFCOUNT_H__
#include <sys/limits.h>
#include <machine/atomic.h>
#ifdef _KERNEL
@ -51,6 +52,7 @@ static __inline void
refcount_acquire(volatile u_int *count)
{
KASSERT(*count < UINT_MAX, ("refcount %p overflowed", count));
atomic_add_acq_int(count, 1);
}