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authorStephen Hemminger <shemminger@vyatta.com>2011-08-01 20:19:00 +0400
committerDavid S. Miller <davem@davemloft.net>2011-08-02 15:29:23 +0400
commita9b3cd7f323b2e57593e7215362a7b02fc933e3a (patch)
treeeba1741956aef3015d5b1a07253bf93c4c1bc7df /net/caif/cfmuxl.c
parent76f793e3a47139d340185cbc1a314740c09b13d3 (diff)
downloadlinux-a9b3cd7f323b2e57593e7215362a7b02fc933e3a.tar.xz
rcu: convert uses of rcu_assign_pointer(x, NULL) to RCU_INIT_POINTER
When assigning a NULL value to an RCU protected pointer, no barrier is needed. The rcu_assign_pointer, used to handle that but will soon change to not handle the special case. Convert all rcu_assign_pointer of NULL value. //smpl @@ expression P; @@ - rcu_assign_pointer(P, NULL) + RCU_INIT_POINTER(P, NULL) // </smpl> Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/caif/cfmuxl.c')
-rw-r--r--net/caif/cfmuxl.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/caif/cfmuxl.c b/net/caif/cfmuxl.c
index c23979e79dfa..b36f24a4c8e7 100644
--- a/net/caif/cfmuxl.c
+++ b/net/caif/cfmuxl.c
@@ -108,7 +108,7 @@ struct cflayer *cfmuxl_remove_dnlayer(struct cflayer *layr, u8 phyid)
int idx = phyid % DN_CACHE_SIZE;
spin_lock_bh(&muxl->transmit_lock);
- rcu_assign_pointer(muxl->dn_cache[idx], NULL);
+ RCU_INIT_POINTER(muxl->dn_cache[idx], NULL);
dn = get_from_id(&muxl->frml_list, phyid);
if (dn == NULL)
goto out;
@@ -164,7 +164,7 @@ struct cflayer *cfmuxl_remove_uplayer(struct cflayer *layr, u8 id)
if (up == NULL)
goto out;
- rcu_assign_pointer(muxl->up_cache[idx], NULL);
+ RCU_INIT_POINTER(muxl->up_cache[idx], NULL);
list_del_rcu(&up->node);
out:
spin_unlock_bh(&muxl->receive_lock);
@@ -261,7 +261,7 @@ static void cfmuxl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
idx = layer->id % UP_CACHE_SIZE;
spin_lock_bh(&muxl->receive_lock);
- rcu_assign_pointer(muxl->up_cache[idx], NULL);
+ RCU_INIT_POINTER(muxl->up_cache[idx], NULL);
list_del_rcu(&layer->node);
spin_unlock_bh(&muxl->receive_lock);
}