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xfrm: Fix xfrm_policy_gc_lock handling. 

From: Alexey Dobriyan <adobriyan@gmail.com>

Based upon a lockdep trace by Simon Arlott.

xfrm_policy_kill() can be called from both BH and
non-BH contexts, so we have to grab xfrm_policy_gc_lock
with BH disabling.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexey Dobriyan 2008-11-03 19:11:29 -08:00 committed by David S. Miller
parent 19ecb6ba80
commit bbb770e7ab
1 changed files with 2 additions and 2 deletions
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4
net/xfrm/xfrm_policy.c
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@ -315,9 +315,9 @@ static void xfrm_policy_kill(struct xfrm_policy *policy)
return;
}
spin_lock(&xfrm_policy_gc_lock);
spin_lock_bh(&xfrm_policy_gc_lock);
hlist_add_head(&policy->bydst, &xfrm_policy_gc_list);
spin_unlock(&xfrm_policy_gc_lock);
spin_unlock_bh(&xfrm_policy_gc_lock);
schedule_work(&xfrm_policy_gc_work);
}