[PATCH] rearrange frto field to save space.

[Stephen Hemminger <shemminger@xxxxxxxx>]

Since the frto_counter field only goes from 0 to 4, it can be moved
into a unused byte size hole to save space.

diff -Nru a/include/linux/tcp.h b/include/linux/tcp.h
--- a/include/linux/tcp.h       Wed Apr 21 10:39:07 2004
+++ b/include/linux/tcp.h       Wed Apr 21 10:39:07 2004
@@ -255,6 +255,10 @@
        __u8    retransmits;    /* Number of unrecovered RTO timeouts.  */
 
        __u8    reordering;     /* Packet reordering metric.            */
+       __u8    frto_counter;   /* Number of new acks after RTO */
+       __u32   frto_highmark;  /* snd_nxt when RTO occurred */
+
+       __u8    unused_pad;
        __u8    queue_shrunk;   /* Write queue has been shrunk recently.*/
        __u8    defer_accept;   /* User waits for some data after accept() */
 
@@ -369,9 +373,6 @@
        unsigned int            keepalive_time;   /* time before keep alive 
takes place */
        unsigned int            keepalive_intvl;  /* time interval between keep 
alive probes */
        int                     linger2;
-
-       int                     frto_counter; /* Number of new acks after RTO */
-       __u32                   frto_highmark; /* snd_nxt when RTO occurred */
 
        unsigned long last_synq_overflow;