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authorStephen Hemminger <shemminger@osdl.org>2006-12-07 15:08:17 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-12-08 17:19:20 -0800
commit3644f0cee77494190452de132e82245107939284 (patch)
tree7aeb1dd32c68e372cc2aaa9d26703dd238b48a53 /net/core
parenteb991b39385c7b04923d701764a34694ec54b53d (diff)
[NET]: Convert hh_lock to seqlock.
The hard header cache is in the main output path, so using seqlock instead of reader/writer lock should reduce overhead. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/neighbour.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 0ab1987b934..e7300b6b407 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -577,9 +577,10 @@ void neigh_destroy(struct neighbour *neigh)
while ((hh = neigh->hh) != NULL) {
neigh->hh = hh->hh_next;
hh->hh_next = NULL;
- write_lock_bh(&hh->hh_lock);
+
+ write_seqlock_bh(&hh->hh_lock);
hh->hh_output = neigh_blackhole;
- write_unlock_bh(&hh->hh_lock);
+ write_sequnlock_bh(&hh->hh_lock);
if (atomic_dec_and_test(&hh->hh_refcnt))
kfree(hh);
}
@@ -897,9 +898,9 @@ static void neigh_update_hhs(struct neighbour *neigh)
if (update) {
for (hh = neigh->hh; hh; hh = hh->hh_next) {
- write_lock_bh(&hh->hh_lock);
+ write_seqlock_bh(&hh->hh_lock);
update(hh, neigh->dev, neigh->ha);
- write_unlock_bh(&hh->hh_lock);
+ write_sequnlock_bh(&hh->hh_lock);
}
}
}
@@ -1089,7 +1090,7 @@ static void neigh_hh_init(struct neighbour *n, struct dst_entry *dst,
break;
if (!hh && (hh = kzalloc(sizeof(*hh), GFP_ATOMIC)) != NULL) {
- rwlock_init(&hh->hh_lock);
+ seqlock_init(&hh->hh_lock);
hh->hh_type = protocol;
atomic_set(&hh->hh_refcnt, 0);
hh->hh_next = NULL;