Pull percpureserve into release branch

[firefly-linux-kernel-4.4.55.git] / net / core / utils.c

diff --git a/net/core/utils.c b/net/core/utils.c
index 0bf17da40d52e0b60158052c20783ea5f5fe24ba..8031eb59054e057f4556f0cf4f4d251020f57b0d 100644 (file)
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -91,17 +91,6 @@ EXPORT_SYMBOL(in_aton);
 #define IN6PTON_NULL           0x20000000      /* first/tail */
 #define IN6PTON_UNKNOWN                0x40000000
 
-static inline int digit2bin(char c, int delim)
-{
-       if (c == delim || c == '\0')
-               return IN6PTON_DELIM;
-       if (c == '.')
-               return IN6PTON_DOT;
-       if (c >= '0' && c <= '9')
-               return (IN6PTON_DIGIT | (c - '0'));
-       return IN6PTON_UNKNOWN;
-}
-
 static inline int xdigit2bin(char c, int delim)
 {
        if (c == delim || c == '\0')
@@ -293,3 +282,19 @@ out:
 }
 
 EXPORT_SYMBOL(in6_pton);
+
+void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
+                             __be32 from, __be32 to, int pseudohdr)
+{
+       __be32 diff[] = { ~from, to };
+       if (skb->ip_summed != CHECKSUM_PARTIAL) {
+               *sum = csum_fold(csum_partial(diff, sizeof(diff),
+                               ~csum_unfold(*sum)));
+               if (skb->ip_summed == CHECKSUM_COMPLETE && pseudohdr)
+                       skb->csum = ~csum_partial(diff, sizeof(diff),
+                                               ~skb->csum);
+       } else if (pseudohdr)
+               *sum = ~csum_fold(csum_partial(diff, sizeof(diff),
+                               csum_unfold(*sum)));
+}
+EXPORT_SYMBOL(inet_proto_csum_replace4);