Merge Linus master into drm-next

The merge is clean, but the arm build fails afterwards,
due to API changes in the regulator tree.

I've included the patch into the merge to fix the build.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 27 insertions, 10 deletions

diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c
index ad704c757bb4..74dddf84adcd 100644
--- a/net/core/sock_diag.c
+++ b/net/core/sock_diag.c
@@ -13,22 +13,39 @@ static const struct sock_diag_handler *sock_diag_handlers[AF_MAX];
 static int (*inet_rcv_compat)(struct sk_buff *skb, struct nlmsghdr *nlh);
 static DEFINE_MUTEX(sock_diag_table_mutex);
 
-int sock_diag_check_cookie(void *sk, __u32 *cookie)
+static u64 sock_gen_cookie(struct sock *sk)
 {
-	if ((cookie[0] != INET_DIAG_NOCOOKIE ||
-	     cookie[1] != INET_DIAG_NOCOOKIE) &&
-	    ((u32)(unsigned long)sk != cookie[0] ||
-	     (u32)((((unsigned long)sk) >> 31) >> 1) != cookie[1]))
-		return -ESTALE;
-	else
+	while (1) {
+		u64 res = atomic64_read(&sk->sk_cookie);
+
+		if (res)
+			return res;
+		res = atomic64_inc_return(&sock_net(sk)->cookie_gen);
+		atomic64_cmpxchg(&sk->sk_cookie, 0, res);
+	}
+}
+
+int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie)
+{
+	u64 res;
+
+	if (cookie[0] == INET_DIAG_NOCOOKIE && cookie[1] == INET_DIAG_NOCOOKIE)
 		return 0;
+
+	res = sock_gen_cookie(sk);
+	if ((u32)res != cookie[0] || (u32)(res >> 32) != cookie[1])
+		return -ESTALE;
+
+	return 0;
 }
 EXPORT_SYMBOL_GPL(sock_diag_check_cookie);
 
-void sock_diag_save_cookie(void *sk, __u32 *cookie)
+void sock_diag_save_cookie(struct sock *sk, __u32 *cookie)
 {
-	cookie[0] = (u32)(unsigned long)sk;
-	cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
+	u64 res = sock_gen_cookie(sk);
+
+	cookie[0] = (u32)res;
+	cookie[1] = (u32)(res >> 32);
 }
 EXPORT_SYMBOL_GPL(sock_diag_save_cookie);