mac80211: use compare_ether_addr on MAC addresses instead of memcmp

Because of the constant size and guaranteed 16 bit alignment, the inline
compare_ether_addr function is much cheaper than calling memcmp.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 8 insertions, 6 deletions

diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index dc51669e67d8..157642f780b9 100644
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -348,7 +348,7 @@ static struct mesh_path *mpath_lookup(struct mesh_table *tbl, u8 *dst,
         hlist_for_each_entry_rcu(node, n, bucket, list) {
                 mpath = node->mpath;
                 if (mpath->sdata == sdata &&
-                                memcmp(dst, mpath->dst, ETH_ALEN) == 0) {
+                                compare_ether_addr(dst, mpath->dst) == 0) {
                         if (MPATH_EXPIRED(mpath)) {
                                 spin_lock_bh(&mpath->state_lock);
                                 mpath->flags &= ~MESH_PATH_ACTIVE;
@@ -523,7 +523,7 @@ int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata)
         int err = 0;
         u32 hash_idx;
 
-        if (memcmp(dst, sdata->vif.addr, ETH_ALEN) == 0)
+        if (compare_ether_addr(dst, sdata->vif.addr) == 0)
                 /* never add ourselves as neighbours */
                 return -ENOTSUPP;
 
@@ -564,7 +564,8 @@ int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata)
         err = -EEXIST;
         hlist_for_each_entry(node, n, bucket, list) {
                 mpath = node->mpath;
-                if (mpath->sdata == sdata && memcmp(dst, mpath->dst, ETH_ALEN) == 0)
+                if (mpath->sdata == sdata &&
+                    compare_ether_addr(dst, mpath->dst) == 0)
                         goto err_exists;
         }
 
@@ -655,7 +656,7 @@ int mpp_path_add(u8 *dst, u8 *mpp, struct ieee80211_sub_if_data *sdata)
         int err = 0;
         u32 hash_idx;
 
-        if (memcmp(dst, sdata->vif.addr, ETH_ALEN) == 0)
+        if (compare_ether_addr(dst, sdata->vif.addr) == 0)
                 /* never add ourselves as neighbours */
                 return -ENOTSUPP;
 
@@ -692,7 +693,8 @@ int mpp_path_add(u8 *dst, u8 *mpp, struct ieee80211_sub_if_data *sdata)
         err = -EEXIST;
         hlist_for_each_entry(node, n, bucket, list) {
                 mpath = node->mpath;
-                if (mpath->sdata == sdata && memcmp(dst, mpath->dst, ETH_ALEN) == 0)
+                if (mpath->sdata == sdata &&
+                    compare_ether_addr(dst, mpath->dst) == 0)
                         goto err_exists;
         }
 
@@ -886,7 +888,7 @@ int mesh_path_del(u8 *addr, struct ieee80211_sub_if_data *sdata)
         hlist_for_each_entry(node, n, bucket, list) {
                 mpath = node->mpath;
                 if (mpath->sdata == sdata &&
-                    memcmp(addr, mpath->dst, ETH_ALEN) == 0) {
+                    compare_ether_addr(addr, mpath->dst) == 0) {
                         __mesh_path_del(tbl, node);
                         goto enddel;
                 }