drivers: power: report battery voltage in AOSP compatible format

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / core / secure_seq.c

diff --git a/net/core/secure_seq.c b/net/core/secure_seq.c
index 6a2f13cee86a0c3f34f69832d4b6d93592fd5327..d0afc322b961f37be72a908c4e3fb66b40ff761a 100644 (file)
--- a/net/core/secure_seq.c
+++ b/net/core/secure_seq.c
@@ -10,12 +10,27 @@
 
 #include <net/secure_seq.h>
 
-static u32 net_secret[MD5_MESSAGE_BYTES / 4] ____cacheline_aligned;
+#if IS_ENABLED(CONFIG_IPV6) || IS_ENABLED(CONFIG_INET)
+#define NET_SECRET_SIZE (MD5_MESSAGE_BYTES / 4)
 
-void net_secret_init(void)
+static u32 net_secret[NET_SECRET_SIZE] ____cacheline_aligned;
+
+static void net_secret_init(void)
 {
-       get_random_bytes(net_secret, sizeof(net_secret));
+       u32 tmp;
+       int i;
+
+       if (likely(net_secret[0]))
+               return;
+
+       for (i = NET_SECRET_SIZE; i > 0;) {
+               do {
+                       get_random_bytes(&tmp, sizeof(tmp));
+               } while (!tmp);
+               cmpxchg(&net_secret[--i], 0, tmp);
+       }
 }
+#endif
 
 #ifdef CONFIG_INET
 static u32 seq_scale(u32 seq)
@@ -42,6 +57,7 @@ __u32 secure_tcpv6_sequence_number(const __be32 *saddr, const __be32 *daddr,
        u32 hash[MD5_DIGEST_WORDS];
        u32 i;
 
+       net_secret_init();
        memcpy(hash, saddr, 16);
        for (i = 0; i < 4; i++)
                secret[i] = net_secret[i] + (__force u32)daddr[i];
@@ -63,6 +79,7 @@ u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr,
        u32 hash[MD5_DIGEST_WORDS];
        u32 i;
 
+       net_secret_init();
        memcpy(hash, saddr, 16);
        for (i = 0; i < 4; i++)
                secret[i] = net_secret[i] + (__force u32) daddr[i];
@@ -78,35 +95,13 @@ EXPORT_SYMBOL(secure_ipv6_port_ephemeral);
 #endif
 
 #ifdef CONFIG_INET
-__u32 secure_ip_id(__be32 daddr)
-{
-       u32 hash[MD5_DIGEST_WORDS];
-
-       hash[0] = (__force __u32) daddr;
-       hash[1] = net_secret[13];
-       hash[2] = net_secret[14];
-       hash[3] = net_secret[15];
-
-       md5_transform(hash, net_secret);
-
-       return hash[0];
-}
-
-__u32 secure_ipv6_id(const __be32 daddr[4])
-{
-       __u32 hash[4];
-
-       memcpy(hash, daddr, 16);
-       md5_transform(hash, net_secret);
-
-       return hash[0];
-}
 
 __u32 secure_tcp_sequence_number(__be32 saddr, __be32 daddr,
                                 __be16 sport, __be16 dport)
 {
        u32 hash[MD5_DIGEST_WORDS];
 
+       net_secret_init();
        hash[0] = (__force u32)saddr;
        hash[1] = (__force u32)daddr;
        hash[2] = ((__force u16)sport << 16) + (__force u16)dport;
@@ -121,6 +116,7 @@ u32 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport)
 {
        u32 hash[MD5_DIGEST_WORDS];
 
+       net_secret_init();
        hash[0] = (__force u32)saddr;
        hash[1] = (__force u32)daddr;
        hash[2] = (__force u32)dport ^ net_secret[14];
@@ -140,6 +136,7 @@ u64 secure_dccp_sequence_number(__be32 saddr, __be32 daddr,
        u32 hash[MD5_DIGEST_WORDS];
        u64 seq;
 
+       net_secret_init();
        hash[0] = (__force u32)saddr;
        hash[1] = (__force u32)daddr;
        hash[2] = ((__force u16)sport << 16) + (__force u16)dport;
@@ -164,6 +161,7 @@ u64 secure_dccpv6_sequence_number(__be32 *saddr, __be32 *daddr,
        u64 seq;
        u32 i;
 
+       net_secret_init();
        memcpy(hash, saddr, 16);
        for (i = 0; i < 4; i++)
                secret[i] = net_secret[i] + daddr[i];