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authorTaehee Yoo <ap420073@gmail.com>2021-03-25 16:16:55 +0000
committerDavid S. Miller <davem@davemloft.net>2021-03-26 15:14:56 -0700
commit88e2ca3080947fe22eb520c1f8231e79a105d011 (patch)
tree546cc57e9db1e1f5c09b951694a4213d1d725515 /drivers
parent4b200e398953c237c86d32bf26d4cb2a96556a6f (diff)
mld: convert ifmcaddr6 to RCU
The ifmcaddr6 has been protected by inet6_dev->lock(rwlock) so that the critical section is atomic context. In order to switch this context, changing locking is needed. The ifmcaddr6 actually already protected by RTNL So if it's converted to use RCU, its control path context can be switched to sleepable. Suggested-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/s390/net/qeth_l3_main.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 35b42275a06c..d308ff744a29 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -1098,8 +1098,9 @@ walk_ipv6:
tmp.disp_flag = QETH_DISP_ADDR_ADD;
tmp.is_multicast = 1;
- read_lock_bh(&in6_dev->lock);
- for (im6 = in6_dev->mc_list; im6 != NULL; im6 = im6->next) {
+ for (im6 = rtnl_dereference(in6_dev->mc_list);
+ im6;
+ im6 = rtnl_dereference(im6->next)) {
tmp.u.a6.addr = im6->mca_addr;
ipm = qeth_l3_find_addr_by_ip(card, &tmp);
@@ -1117,7 +1118,6 @@ walk_ipv6:
qeth_l3_ipaddr_hash(ipm));
}
- read_unlock_bh(&in6_dev->lock);
out:
return 0;