sctp: Save some room in the sctp_transport by using bitfields

Saves some room in the sctp_transport structure.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>

1 files changed, 27 insertions, 22 deletions

diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 03deffb1886b..9072dd67d8ad 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -877,7 +877,33 @@ struct sctp_transport {
 
         /* Reference counting. */
         atomic_t refcnt;
-        int      dead;
+        int      dead:1,
+                /* RTO-Pending : A flag used to track if one of the DATA
+                 *              chunks sent to this address is currently being
+                 *              used to compute a RTT. If this flag is 0,
+                 *              the next DATA chunk sent to this destination
+                 *              should be used to compute a RTT and this flag
+                 *              should be set. Every time the RTT
+                 *              calculation completes (i.e. the DATA chunk
+                 *              is SACK'd) clear this flag.
+                 */
+                 rto_pending:1,
+
+                /*
+                 * hb_sent : a flag that signals that we have a pending
+                 * heartbeat.
+                 */
+                hb_sent:1,
+
+                /* Flag to track the current fast recovery state */
+                fast_recovery:1,
+
+                /* Is the Path MTU update pending on this tranport */
+                pmtu_pending:1,
+
+                /* Is this structure kfree()able? */
+                malloced:1;
+
 
         /* This is the peer's IP address and port. */
         union sctp_addr ipaddr;
@@ -907,22 +933,6 @@ struct sctp_transport {
         /* SRTT        : The current smoothed round trip time.  */
         __u32 srtt;
 
-        /* RTO-Pending : A flag used to track if one of the DATA
-         *              chunks sent to this address is currently being
-         *              used to compute a RTT. If this flag is 0,
-         *              the next DATA chunk sent to this destination
-         *              should be used to compute a RTT and this flag
-         *              should be set. Every time the RTT
-         *              calculation completes (i.e. the DATA chunk
-         *              is SACK'd) clear this flag.
-         * hb_sent : a flag that signals that we have a pending heartbeat.
-         */
-        __u8 rto_pending;
-        __u8 hb_sent;
-
-        /* Flag to track the current fast recovery state */
-        __u8 fast_recovery;
-
         /*
          * These are the congestion stats.
          */
@@ -975,9 +985,6 @@ struct sctp_transport {
          */
         __u16 pathmaxrxt;
 
-        /* is the Path MTU update pending on this tranport */
-        __u8 pmtu_pending;
-
         /* PMTU       : The current known path MTU.  */
         __u32 pathmtu;
 
@@ -1021,8 +1028,6 @@ struct sctp_transport {
         /* This is the list of transports that have chunks to send.  */
         struct list_head send_ready;
 
-        int malloced; /* Is this structure kfree()able? */
-
         /* State information saved for SFR_CACC algorithm. The key
          * idea in SFR_CACC is to maintain state at the sender on a
          * per-destination basis when a changeover happens.