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Avoid endless recursion on panic.

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Reviewed by:	jhb
This commit is contained in:
Boris Popov 2001-04-10 00:56:19 +00:00
parent d53d22496f
commit 16162e5789
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=75364
1 changed files with 6 additions and 2 deletions
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8
sys/kern/subr_witness.c
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@ -778,8 +778,10 @@ enroll(const char *description, struct lock_class *lock_class)
* This isn't quite right, as witness_cold is still 0 while we
* enroll all the locks initialized before witness_initialize().
*/
if ((lock_class->lc_flags & LC_SPINLOCK) && !witness_cold)
if ((lock_class->lc_flags & LC_SPINLOCK) && !witness_cold) {
mtx_unlock_spin(&w_mtx);
panic("spin lock %s not in order list", description);
}
if ((w = witness_get()) == NULL)
return (NULL);
w->w_name = description;
@ -790,9 +792,11 @@ enroll(const char *description, struct lock_class *lock_class)
STAILQ_INSERT_HEAD(&w_spin, w, w_typelist);
else if (lock_class->lc_flags & LC_SLEEPLOCK)
STAILQ_INSERT_HEAD(&w_sleep, w, w_typelist);
else
else {
mtx_unlock_spin(&w_mtx);
panic("lock class %s is not sleep or spin",
lock_class->lc_name);
}
mtx_unlock_spin(&w_mtx);
return (w);