net: tcp: replace the document for "lsndtime" in tcp_sock

Commit d5fed5addb2b ("tcp: reorganize tcp_sock fast path variables")
moved the fields around and misplaced the documentation for "lsndtime".
So, let's replace it in the proper place.

Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20241104070041.64302-1-dongml2@chinatelecom.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 6a5e08b937b3156ff876eec85d153b975bf217ef..f88daaa76d836654b2a2e217d0d744d3713d368e 100644 (file)
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -200,7 +200,6 @@ struct tcp_sock {
 
        /* TX read-mostly hotpath cache lines */
        __cacheline_group_begin(tcp_sock_read_tx);
-       /* timestamp of last sent data packet (for restart window) */
        u32     max_window;     /* Maximal window ever seen from peer   */
        u32     rcv_ssthresh;   /* Current window clamp                 */
        u32     reordering;     /* Packet reordering metric.            */
@@ -263,7 +262,7 @@ struct tcp_sock {
        u32     chrono_stat[3]; /* Time in jiffies for chrono_stat stats */
        u32     write_seq;      /* Tail(+1) of data held in tcp send buffer */
        u32     pushed_seq;     /* Last pushed seq, required to talk to windows */
-       u32     lsndtime;
+       u32     lsndtime;       /* timestamp of last sent data packet (for restart window) */
        u32     mdev_us;        /* medium deviation                     */
        u32     rtt_seq;        /* sequence number to update rttvar     */
        u64     tcp_wstamp_ns;  /* departure time for next sent data packet */