Merge branch 'linux-linaro-lsk-v3.10' into linux-linaro-lsk-v3.10-androidlsk-v3.10-15.08-android

 Conflicts:
	fs/exec.c

 Resolution summary:

    Conflict between upstream/LTS commit 9eae8ac6ab40 (fs: take
    i_mutex during prepare_binprm for set[ug]id executables) and
    android commit 9d0ff694bc22 (sched: move no_new_privs into new
    atomic flags).  Resolution: move task_no_new_privs() usage into
    new function created by upstream/LTS comit.

1 files changed, 3 insertions, 17 deletions

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 81b4b816f131..39fa33969b09 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1150,16 +1150,6 @@ static void packet_sock_destruct(struct sock *sk)
 	sk_refcnt_debug_dec(sk);
 }
 
-static int fanout_rr_next(struct packet_fanout *f, unsigned int num)
-{
-	int x = atomic_read(&f->rr_cur) + 1;
-
-	if (x >= num)
-		x = 0;
-
-	return x;
-}
-
 static unsigned int fanout_demux_hash(struct packet_fanout *f,
 				      struct sk_buff *skb,
 				      unsigned int num)
@@ -1171,13 +1161,9 @@ static unsigned int fanout_demux_lb(struct packet_fanout *f,
 				    struct sk_buff *skb,
 				    unsigned int num)
 {
-	int cur, old;
+	unsigned int val = atomic_inc_return(&f->rr_cur);
 
-	cur = atomic_read(&f->rr_cur);
-	while ((old = atomic_cmpxchg(&f->rr_cur, cur,
-				     fanout_rr_next(f, num))) != cur)
-		cur = old;
-	return cur;
+	return val % num;
 }
 
 static unsigned int fanout_demux_cpu(struct packet_fanout *f,
@@ -1217,7 +1203,7 @@ static int packet_rcv_fanout(struct sk_buff *skb, struct net_device *dev,
 			     struct packet_type *pt, struct net_device *orig_dev)
 {
 	struct packet_fanout *f = pt->af_packet_priv;
-	unsigned int num = f->num_members;
+	unsigned int num = ACCESS_ONCE(f->num_members);
 	struct packet_sock *po;
 	unsigned int idx;