[IPV6]: Convert cork.hop_limit and cork.tclass into u8 instead of int.

Values of those fields are always between 0 and 255 (inclusive),
so use u8 and save some memory on 32bit systems.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 2102d8b..9b59e37 100644 (file)
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -315,8 +315,8 @@ struct ipv6_pinfo {
        struct sk_buff          *pktoptions;
        struct {
                struct ipv6_txoptions *opt;
-               int hop_limit;
-               int tclass;
+               u8 hop_limit;
+               u8 tclass;
        } cork;
 };