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sysctl: don't modify oid_running for static nodes

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It is necessary to prevent nodes from being destroyed while used, but static
ones cannot be destroyed.
This commit is contained in:
Mateusz Guzik 2014-12-28 19:24:01 +00:00
parent 874d48dc8f
commit 84267cacf4
1 changed files with 7 additions and 4 deletions
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11
sys/kern/kern_sysctl.c
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@ -174,7 +174,8 @@ sysctl_root_handler_locked(struct sysctl_oid *oid, void *arg1, intptr_t arg2,
int error;
bool xlocked;
atomic_add_int(&oid->oid_running, 1);
if (oid->oid_kind & CTLFLAG_DYN)
atomic_add_int(&oid->oid_running, 1);
xlocked = sysctl_unlock();
if (!(oid->oid_kind & CTLFLAG_MPSAFE))
@ -184,9 +185,11 @@ sysctl_root_handler_locked(struct sysctl_oid *oid, void *arg1, intptr_t arg2,
mtx_unlock(&Giant);
sysctl_lock(xlocked);
if (atomic_fetchadd_int(&oid->oid_running, -1) == 1 &&
(oid->oid_kind & CTLFLAG_DYING) != 0)
wakeup(&oid->oid_running);
if (oid->oid_kind & CTLFLAG_DYN) {
if (atomic_fetchadd_int(&oid->oid_running, -1) == 1 &&
(oid->oid_kind & CTLFLAG_DYING) != 0)
wakeup(&oid->oid_running);
}
return (error);
}