mac80211: use fixed broadcast address
The netdev broadcast address cannot change from
all-ones so there's no need to use it; we can
instead hard-code it. Since we already have an
instance in tkip.c, which will be shared if it
is marked static const, doing this reduces text
size at no data/bss cost.
The real motivation for this is, of course, the
desire to get rid of almost all uses of netdevs
in mac80211 so that auditing their use becomes
easier.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 5c67e7b..d930198 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -101,10 +101,12 @@
MPATH_RANN
};
+static const u8 broadcast_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+
static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
u8 *orig_addr, __le32 orig_sn, u8 target_flags, u8 *target,
- __le32 target_sn, u8 *da, u8 hop_count, u8 ttl,__le32 lifetime,
- __le32 metric, __le32 preq_id,
+ __le32 target_sn, const u8 *da, u8 hop_count, u8 ttl,
+ __le32 lifetime, __le32 metric, __le32 preq_id,
struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
@@ -198,8 +200,8 @@
* @ra: node this frame is addressed to
*/
int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn,
- __le16 target_rcode, u8 *ra,
- struct ieee80211_sub_if_data *sdata)
+ __le16 target_rcode, const u8 *ra,
+ struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
@@ -548,7 +550,7 @@
hopcount = PREQ_IE_HOPCOUNT(preq_elem) + 1;
mesh_path_sel_frame_tx(MPATH_PREQ, flags, orig_addr,
cpu_to_le32(orig_sn), target_flags, target_addr,
- cpu_to_le32(target_sn), sdata->dev->broadcast,
+ cpu_to_le32(target_sn), broadcast_addr,
hopcount, ttl, cpu_to_le32(lifetime),
cpu_to_le32(metric), cpu_to_le32(preq_id),
sdata);
@@ -660,7 +662,7 @@
spin_unlock_bh(&mpath->state_lock);
mesh_path_error_tx(ttl, target_addr, cpu_to_le32(target_sn),
cpu_to_le16(target_rcode),
- sdata->dev->broadcast, sdata);
+ broadcast_addr, sdata);
} else
spin_unlock_bh(&mpath->state_lock);
}
@@ -709,7 +711,7 @@
if (mpath->sn < orig_sn) {
mesh_path_sel_frame_tx(MPATH_RANN, flags, orig_addr,
cpu_to_le32(orig_sn),
- 0, NULL, 0, sdata->dev->broadcast,
+ 0, NULL, 0, broadcast_addr,
hopcount, ttl, 0,
cpu_to_le32(metric + mpath->metric),
0, sdata);
@@ -890,7 +892,7 @@
spin_unlock_bh(&mpath->state_lock);
mesh_path_sel_frame_tx(MPATH_PREQ, 0, sdata->dev->dev_addr,
cpu_to_le32(ifmsh->sn), target_flags, mpath->dst,
- cpu_to_le32(mpath->sn), sdata->dev->broadcast, 0,
+ cpu_to_le32(mpath->sn), broadcast_addr, 0,
ttl, cpu_to_le32(lifetime), 0,
cpu_to_le32(ifmsh->preq_id++), sdata);
mod_timer(&mpath->timer, jiffies + mpath->discovery_timeout);
@@ -1011,6 +1013,6 @@
mesh_path_sel_frame_tx(MPATH_RANN, 0, sdata->dev->dev_addr,
cpu_to_le32(++ifmsh->sn),
- 0, NULL, 0, sdata->dev->broadcast,
+ 0, NULL, 0, broadcast_addr,
0, MESH_TTL, 0, 0, 0, sdata);
}