IPv6: convert mc_lock to spinlock

Only used for writing, so convert to spinlock

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
index e9d69d198495..545d8b059bef 100644
--- a/include/net/if_inet6.h
+++ b/include/net/if_inet6.h
@@ -157,7 +157,7 @@ struct inet6_dev {
 
         struct ifmcaddr6        *mc_list;
         struct ifmcaddr6        *mc_tomb;
-        rwlock_t                mc_lock;
+        spinlock_t              mc_lock;
         unsigned char           mc_qrv;
         unsigned char           mc_gq_running;
         unsigned char           mc_ifc_count;