Patch "net: bridge: fdb: convert is_sticky to bitops" has been added to the 5.4-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    net: bridge: fdb: convert is_sticky to bitops

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:
     net-bridge-fdb-convert-is_sticky-to-bitops.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 1e8321becdece1d0d2f06e07e6ce55be7adf180f
Author: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
Date:   Tue Oct 29 13:45:55 2019 +0200

    net: bridge: fdb: convert is_sticky to bitops
    
    [ Upstream commit e0458d9a733ba71a2821d0c3fc0745baac697db0 ]
    
    Straight-forward convert of the is_sticky field to bitops.
    
    Signed-off-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
    Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
    Stable-dep-of: bee2ef946d31 ("net: bridge: br_fdb_external_learn_add(): always set EXT_LEARN")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index 1c890e2d694b..3645c1172b50 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -509,7 +509,6 @@ static struct net_bridge_fdb_entry *fdb_create(struct net_bridge *br,
 		fdb->added_by_user = 0;
 		fdb->added_by_external_learn = 0;
 		fdb->offloaded = 0;
-		fdb->is_sticky = 0;
 		fdb->updated = fdb->used = jiffies;
 		if (rhashtable_lookup_insert_fast(&br->fdb_hash_tbl,
 						  &fdb->rhnode,
@@ -590,7 +589,8 @@ void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 			unsigned long now = jiffies;
 
 			/* fastpath: update of existing entry */
-			if (unlikely(source != fdb->dst && !fdb->is_sticky)) {
+			if (unlikely(source != fdb->dst &&
+				     !test_bit(BR_FDB_STICKY, &fdb->flags))) {
 				fdb->dst = source;
 				fdb_modified = true;
 				/* Take over HW learned entry */
@@ -662,7 +662,7 @@ static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br,
 		ndm->ndm_flags |= NTF_OFFLOADED;
 	if (fdb->added_by_external_learn)
 		ndm->ndm_flags |= NTF_EXT_LEARNED;
-	if (fdb->is_sticky)
+	if (test_bit(BR_FDB_STICKY, &fdb->flags))
 		ndm->ndm_flags |= NTF_STICKY;
 
 	if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->key.addr))
@@ -809,7 +809,7 @@ static int fdb_add_entry(struct net_bridge *br, struct net_bridge_port *source,
 			 const u8 *addr, u16 state, u16 flags, u16 vid,
 			 u8 ndm_flags)
 {
-	u8 is_sticky = !!(ndm_flags & NTF_STICKY);
+	bool is_sticky = !!(ndm_flags & NTF_STICKY);
 	struct net_bridge_fdb_entry *fdb;
 	bool modified = false;
 
@@ -866,8 +866,8 @@ static int fdb_add_entry(struct net_bridge *br, struct net_bridge_port *source,
 		modified = true;
 	}
 
-	if (is_sticky != fdb->is_sticky) {
-		fdb->is_sticky = is_sticky;
+	if (is_sticky != test_bit(BR_FDB_STICKY, &fdb->flags)) {
+		change_bit(BR_FDB_STICKY, &fdb->flags);
 		modified = true;
 	}
 
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 7b46323584be..b495778911a2 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -176,6 +176,7 @@ struct net_bridge_vlan_group {
 enum {
 	BR_FDB_LOCAL,
 	BR_FDB_STATIC,
+	BR_FDB_STICKY,
 };
 
 struct net_bridge_fdb_key {
@@ -190,8 +191,7 @@ struct net_bridge_fdb_entry {
 	struct net_bridge_fdb_key	key;
 	struct hlist_node		fdb_node;
 	unsigned long			flags;
-	unsigned char			is_sticky:1,
-					added_by_user:1,
+	unsigned char			added_by_user:1,
 					added_by_external_learn:1,
 					offloaded:1;