Author: glebius
Date: Fri Jul 27 09:16:48 2012
New Revision: 238828
URL: http://svn.freebsd.org/changeset/base/238828
Log:
Add assertion for refcount overflow.
Submitted by: Andrey Zonov <andrey zonov.org>
Reviewed by: kib
Modified:
head/sys/sys/refcount.h
Modified: head/sys/sys/refcount.h
==============================================================================
--- head/sys/sys/refcount.h Fri Jul 27 08:28:44 2012 (r238827)
+++ head/sys/sys/refcount.h Fri Jul 27 09:16:48 2012 (r238828)
@@ -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);
}
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