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authorAmol Grover <frextrite@gmail.com>2020-03-12 11:04:20 +0530
committerDavid S. Miller <davem@davemloft.net>2020-03-11 22:55:25 -0700
commitf9fc28a8de2fb367f1ab76f0cf176ca545db3d6f (patch)
tree030a3793ef5e3c6e2bdb97143640e17aef73827f /net
parenteecba79e694eda24ba698fe1bdf0466d2f797b42 (diff)
downloadlinux-f9fc28a8de2fb367f1ab76f0cf176ca545db3d6f.tar.bz2
net: caif: Add lockdep expression to RCU traversal primitive
caifdevs->list is traversed using list_for_each_entry_rcu() outside an RCU read-side critical section but under the protection of rtnl_mutex. Hence, add the corresponding lockdep expression to silence the following false-positive warning: [ 10.868467] ============================= [ 10.869082] WARNING: suspicious RCU usage [ 10.869817] 5.6.0-rc1-00177-g06ec0a154aae4 #1 Not tainted [ 10.870804] ----------------------------- [ 10.871557] net/caif/caif_dev.c:115 RCU-list traversed in non-reader section!! Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Amol Grover <frextrite@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/caif/caif_dev.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/caif/caif_dev.c b/net/caif/caif_dev.c
index 03c7cdd8e4cb..195d2d67be8a 100644
--- a/net/caif/caif_dev.c
+++ b/net/caif/caif_dev.c
@@ -112,7 +112,8 @@ static struct caif_device_entry *caif_get(struct net_device *dev)
caif_device_list(dev_net(dev));
struct caif_device_entry *caifd;
- list_for_each_entry_rcu(caifd, &caifdevs->list, list) {
+ list_for_each_entry_rcu(caifd, &caifdevs->list, list,
+ lockdep_rtnl_is_held()) {
if (caifd->netdev == dev)
return caifd;
}