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| author | Manfred Spraul <manfred@colorfullife.com> | 2017-07-06 20:45:59 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-09-27 14:39:24 +0200 |
| commit | 4c7f54a0f9778abde87f0a96364c99bbf89e5786 (patch) | |
| tree | 9ff85c854793d492653d8ac6803c6116177f4c74 /arch | |
| parent | 2fd62929c88f4cd0e4a8d920b509504249ff67aa (diff) | |
net/netfilter/nf_conntrack_core: Fix net_conntrack_lock()
commit 3ef0c7a730de0bae03d86c19570af764fa3c4445 upstream.
As we want to remove spin_unlock_wait() and replace it with explicit
spin_lock()/spin_unlock() calls, we can use this to simplify the
locking.
In addition:
- Reading nf_conntrack_locks_all needs ACQUIRE memory ordering.
- The new code avoids the backwards loop.
Only slightly tested, I did not manage to trigger calls to
nf_conntrack_all_lock().
V2: With improved comments, to clearly show how the barriers
pair.
Fixes: b16c29191dc8 ("netfilter: nf_conntrack: use safer way to lock all buckets")
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: netfilter-devel@vger.kernel.org
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions