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-rw-r--r--include/linux/tcp.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 1f12fa0b67d7..f8cf090e8f49 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -332,7 +332,8 @@ struct tcp_sock {
struct tcp_sack_block_wire recv_sack_cache[4];
- u32 highest_sack; /* Start seq of globally highest revd SACK (valid only in slowpath) */
+ u32 highest_sack; /* Start seq of globally highest revd SACK
+ * (validity guaranteed only if sacked_out > 0) */
/* from STCP, retrans queue hinting */
struct sk_buff* lost_skb_hint;