diff options
| author |   Taehee Yoo <ap420073@gmail.com> | 2021-03-25 16:16:55 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-03-26 15:14:56 -0700 |
| commit | 88e2ca3080947fe22eb520c1f8231e79a105d011 (patch) | |
| tree | 546cc57e9db1e1f5c09b951694a4213d1d725515 /drivers/s390 | |
| parent | mld: convert ip6_sf_list to RCU (diff) | |
| download | linux-dev-88e2ca3080947fe22eb520c1f8231e79a105d011.tar.xz linux-dev-88e2ca3080947fe22eb520c1f8231e79a105d011.zip | |
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/s390')
| -rw-r--r-- | drivers/s390/net/qeth_l3_main.c | 6 |
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; |