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netfilter: core: remove erroneous warn_on

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kernel test robot reported:

WARNING: CPU: 0 PID: 1244 at net/netfilter/core.c:218 __nf_hook_entries_try_shrink+0x49/0xcd
[..]

After allowing batching in nf_unregister_net_hooks its possible that an earlier
call to __nf_hook_entries_try_shrink already compacted the list.
If this happens we don't need to do anything.

Fixes: d3ad2c17b4 ("netfilter: core: batch nf_unregister_net_hooks synchronize_net calls")
Reported-by: kernel test robot <xiaolong.ye@intel.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Aaron Conole <aconole@bytheb.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2017-09-06 14:47:57 +02:00 committed by Pablo Neira Ayuso
parent 8073e960a0
commit 74585d4f84
1 changed files with 1 additions and 1 deletions
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2
net/netfilter/core.c
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@ -215,7 +215,7 @@ static void *__nf_hook_entries_try_shrink(struct nf_hook_entries __rcu **pp)
if (skip == hook_entries)
goto out_assign;
if (WARN_ON(skip == 0))
if (skip == 0)
return NULL;
hook_entries -= skip;