Why trying to debug some locking code of my own I enabled
SIMPLELOCK_DEBUG, only to find out that I was getting lots of
`simple_unlock: lock not held' in lockmgr -> acquire -> apause.
Looking closer at `apause' it seems rather clear that it can cause
this. I proposed simple change is below.
Comments?
/assar
--- kern_lock.c.orig Mon Nov 8 03:55:26 1999
+++ kern_lock.c Mon Nov 8 04:24:13 1999
@@ -116,9 +119,11 @@
simple_lock(&lkp->lk_interlock);
if ((lkp->lk_flags & flags) == 0)
return 0;
+ simple_unlock(&lkp->lk_interlock);
break;
}
}
+ simple_lock(&lkp->lk_interlock);
}
return 1;
}
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