This is a note to let you know that I've just added the patch titled
ipmr: convert /proc handlers to rcu_read_lock()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ipmr-convert-proc-handlers-to-rcu_read_lock.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 8d8bd83481af2a3df60c09de0be527457c0db52b
Author: Eric Dumazet <edumazet@xxxxxxxxxx>
Date: Thu Jun 23 04:34:47 2022 +0000
ipmr: convert /proc handlers to rcu_read_lock()
[ Upstream commit b96ef16d2f837870daaea51c38cd50458b95ad5c ]
We can use standard rcu_read_lock(), to get rid
of last read_lock(&mrt_lock) call points.
Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Stable-dep-of: fc9c273d6daa ("ipmr: fix tables suspicious RCU usage")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 2da6896080363..11f916646d34d 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -2916,7 +2916,7 @@ static int ipmr_rtm_dumplink(struct sk_buff *skb, struct netlink_callback *cb)
*/
static void *ipmr_vif_seq_start(struct seq_file *seq, loff_t *pos)
- __acquires(mrt_lock)
+ __acquires(RCU)
{
struct mr_vif_iter *iter = seq->private;
struct net *net = seq_file_net(seq);
@@ -2928,14 +2928,14 @@ static void *ipmr_vif_seq_start(struct seq_file *seq, loff_t *pos)
iter->mrt = mrt;
- read_lock(&mrt_lock);
+ rcu_read_lock();
return mr_vif_seq_start(seq, pos);
}
static void ipmr_vif_seq_stop(struct seq_file *seq, void *v)
- __releases(mrt_lock)
+ __releases(RCU)
{
- read_unlock(&mrt_lock);
+ rcu_read_unlock();
}
static int ipmr_vif_seq_show(struct seq_file *seq, void *v)
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 6642bc7b9870f..33c5974d467dd 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -401,7 +401,7 @@ static void ip6mr_free_table(struct mr_table *mrt)
*/
static void *ip6mr_vif_seq_start(struct seq_file *seq, loff_t *pos)
- __acquires(mrt_lock)
+ __acquires(RCU)
{
struct mr_vif_iter *iter = seq->private;
struct net *net = seq_file_net(seq);
@@ -413,14 +413,14 @@ static void *ip6mr_vif_seq_start(struct seq_file *seq, loff_t *pos)
iter->mrt = mrt;
- read_lock(&mrt_lock);
+ rcu_read_lock();
return mr_vif_seq_start(seq, pos);
}
static void ip6mr_vif_seq_stop(struct seq_file *seq, void *v)
- __releases(mrt_lock)
+ __releases(RCU)
{
- read_unlock(&mrt_lock);
+ rcu_read_unlock();
}
static int ip6mr_vif_seq_show(struct seq_file *seq, void *v)
