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authorSachin Sant <sachinp@in.ibm.com>2010-11-26 02:41:17 +0000
committerDavid S. Miller <davem@davemloft.net>2010-11-28 18:13:16 -0800
commitf3aa3136d9c15ff693198eb34701a74bb0b6b969 (patch)
tree47f26d5a3ee93d8139e6f4b6b336399dbd585d9b /drivers/s390/net/qeth_l3_main.c
parent5e9559689735f760f3a1fb9b2aafeb4d8efbf8f5 (diff)
qeth lcs: convert mc rwlock to RCU
Commit 1d7138de878d1d4210727c1200193e69596f93b3 igmp: RCU conversion of in_dev->mc_list converted rwlock to RCU. Update the s390 network drivers(qeth & lcs) code to adapt to this change. V2 : Changes based on suggestions given by Eric Dumazet Signed-off-by: Sachin Sant <sachinp@in.ibm.com> Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net/qeth_l3_main.c')
-rw-r--r--drivers/s390/net/qeth_l3_main.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 74d1401a5d5..65291db324f 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -1796,7 +1796,8 @@ static void qeth_l3_add_mc(struct qeth_card *card, struct in_device *in4_dev)
char buf[MAX_ADDR_LEN];
QETH_CARD_TEXT(card, 4, "addmc");
- for (im4 = in4_dev->mc_list; im4; im4 = im4->next) {
+ for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL;
+ im4 = rcu_dereference(im4->next_rcu)) {
qeth_l3_get_mac_for_ipm(im4->multiaddr, buf, in4_dev->dev);
ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
if (!ipm)
@@ -1828,9 +1829,9 @@ static void qeth_l3_add_vlan_mc(struct qeth_card *card)
in_dev = in_dev_get(netdev);
if (!in_dev)
continue;
- read_lock(&in_dev->mc_list_lock);
+ rcu_read_lock();
qeth_l3_add_mc(card, in_dev);
- read_unlock(&in_dev->mc_list_lock);
+ rcu_read_unlock();
in_dev_put(in_dev);
}
}
@@ -1843,10 +1844,10 @@ static void qeth_l3_add_multicast_ipv4(struct qeth_card *card)
in4_dev = in_dev_get(card->dev);
if (in4_dev == NULL)
return;
- read_lock(&in4_dev->mc_list_lock);
+ rcu_read_lock();
qeth_l3_add_mc(card, in4_dev);
qeth_l3_add_vlan_mc(card);
- read_unlock(&in4_dev->mc_list_lock);
+ rcu_read_unlock();
in_dev_put(in4_dev);
}