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Diffstat (limited to 'include/net/tcp.h')
-rw-r--r--include/net/tcp.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 33f9d30a6905..afc23596e9aa 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -250,7 +250,6 @@ extern int sysctl_tcp_rmem[3];
#define TCP_RACK_LOSS_DETECTION 0x1 /* Use RACK to detect losses */
-extern int sysctl_tcp_challenge_ack_limit;
extern int sysctl_tcp_min_tso_segs;
extern int sysctl_tcp_min_rtt_wlen;
extern int sysctl_tcp_autocorking;