add watchdog support for cubox, inlude weim by default

6 files changed, 1978 insertions, 141 deletions

diff --git a/target/linux/config/Config.in.audio b/target/linux/config/Config.in.audio
index 6ba4f4842..7813c1800 100644
--- a/target/linux/config/Config.in.audio
+++ b/target/linux/config/Config.in.audio
@@ -16,6 +16,9 @@ config ADK_KERNEL_SND_ARM
 config ADK_KERNEL_SND_SOC_GENERIC_DMAENGINE_PCM
 	boolean
 
+config ADK_KERNEL_SND_DMAENGINE_PCM
+	tristate
+
 config ADK_KERNEL_SND_SOC_SPDIF
 	tristate
 
@@ -175,7 +178,8 @@ config ADK_KERNEL_SND_IMX_SOC
 	select ADK_KERNEL_SND_SOC
 	select ADK_KERNEL_SND_COMPRESS
 	select ADK_KERNEL_SND_PCM_DMAENGINE if !ADK_KERNEL_VERSION_3_10_30
-	select ADK_KERNEL_SND_SOC_GENERIC_DMAENGINE_PCM if ADK_KERNEL_VERSION_3_10_30
+	select ADK_KERNEL_SND_SOC_GENERIC_DMAENGINE_PCM
+	select ADK_KERNEL_SND_DMAENGINE_PCM
 	select ADK_KERNEL_SND_SOC_FSL_SPDIF if ADK_KERNEL_VERSION_3_10_30
 	select ADK_KERNEL_SND_SOC_IMX_PCM_DMA
 	select ADK_KERNEL_SND_SOC_IMX_HDMI_DMA
@@ -185,7 +189,7 @@ config ADK_KERNEL_SND_IMX_SOC
 	select ADK_KERNEL_REGMAP_SPI
 	select ADK_KERNEL_REGMAP_I2C
 	depends on ADK_TARGET_SYSTEM_CUBOX_I
-	default m if ADK_TARGET_SYSTEM_CUBOX_I && !ADK_KERNEL_VERSION_3_14
+	default m if ADK_TARGET_SYSTEM_CUBOX_I
 	default n
 
 endmenu
diff --git a/target/linux/config/Config.in.misc b/target/linux/config/Config.in.misc
index 463a8f369..41e8edc0c 100644
--- a/target/linux/config/Config.in.misc
+++ b/target/linux/config/Config.in.misc
@@ -12,6 +12,12 @@ config ADK_KERNEL_KEYS
 config ADK_KERNEL_SBUS
 	boolean
 
+config ADK_KERNEL_IMX_WEIM
+	boolean
+	depends on ADK_TARGET_SYSTEM_CUBOX_I
+	default y if ADK_TARGET_SYSTEM_CUBOX_I
+	default n
+
 menu "Miscellaneous devices support"
 
 source "target/linux/config/Config.in.rtc"
diff --git a/target/linux/config/Config.in.watchdog b/target/linux/config/Config.in.watchdog
index d8cc5932e..1b9d183cc 100644
--- a/target/linux/config/Config.in.watchdog
+++ b/target/linux/config/Config.in.watchdog
@@ -15,6 +15,16 @@ config ADK_KERNEL_CS5535_CLOCK_EVENT_SRC
 
 menu "Watchdog driver support"
 
+config ADK_KERNEL_IMX2_WDT
+	prompt "Cubox-i Hardware Watchdog"
+	boolean
+	select ADK_KERNEL_WATCHDOG
+	depends on ADK_TARGET_SYSTEM_CUBOX_I
+	default y if ADK_TARGET_SYSTEM_CUBOX_I
+	default n
+	help
+	  Watchdog driver for Cubox-i
+
 config ADK_KERNEL_SCx200_WDT
 	prompt "Natsemi Hardware Watchdog" 
 	boolean
diff --git a/target/linux/patches/3.15-rc7/yaffs2.patch b/target/linux/patches/3.15-rc7/patch-yaffs2
index bb244c7ca..bb244c7ca 100644
--- a/target/linux/patches/3.15-rc7/yaffs2.patch
+++ b/target/linux/patches/3.15-rc7/patch-yaffs2
diff --git a/target/linux/patches/3.15-rc7/tcp-fastopen.patch b/target/linux/patches/3.15-rc7/tcp-fastopen.patch
index 19e1ee2a4..fc1d076ac 100644
--- a/target/linux/patches/3.15-rc7/tcp-fastopen.patch
+++ b/target/linux/patches/3.15-rc7/tcp-fastopen.patch
@@ -1,253 +1,2082 @@
-https://lkml.org/lkml/2014/5/5/674
-Andi Kleen <ak@linux.intel.com>
-
-diff -Nur linux-3.15-rc7/include/linux/tcp.h linux-3.15-rc7.orig/include/linux/tcp.h
---- linux-3.15-rc7/include/linux/tcp.h	2014-05-30 10:01:47.000000000 +0200
-+++ linux-3.15-rc7.orig/include/linux/tcp.h	2014-05-26 01:06:00.000000000 +0200
-@@ -359,9 +359,6 @@
+diff -Nur linux-3.15-rc7.orig/include/linux/tcp.h linux-3.15-rc7/include/linux/tcp.h
+--- linux-3.15-rc7.orig/include/linux/tcp.h	2014-05-26 01:06:00.000000000 +0200
++++ linux-3.15-rc7/include/linux/tcp.h	2014-05-31 22:42:49.024605293 +0200
+@@ -359,6 +359,9 @@
  	return (struct tcp_timewait_sock *)sk;
  }
  
--extern void tcp_sock_destruct(struct sock *sk);
--
--#ifdef CONFIG_TCP_FASTOPEN
++extern void tcp_sock_destruct(struct sock *sk);
++
++#ifdef CONFIG_TCP_FASTOPEN
  static inline bool tcp_passive_fastopen(const struct sock *sk)
  {
  	return (sk->sk_state == TCP_SYN_RECV &&
-@@ -373,6 +370,8 @@
+@@ -370,8 +373,6 @@
  	return foc->len != -1;
  }
  
-+extern void tcp_sock_destruct(struct sock *sk);
-+
+-extern void tcp_sock_destruct(struct sock *sk);
+-
  static inline int fastopen_init_queue(struct sock *sk, int backlog)
  {
  	struct request_sock_queue *queue =
-@@ -392,13 +391,4 @@
+@@ -391,4 +392,13 @@
  	return 0;
  }
  
--#else
--static inline bool tcp_passive_fastopen(const struct sock *sk)
--{ return false; }
--static inline bool fastopen_cookie_present(struct tcp_fastopen_cookie *foc)
--{ return false; }
--static inline int fastopen_init_queue(struct sock *sk, int backlog)
--{ return 0; }
--#endif
--
++#else
++static inline bool tcp_passive_fastopen(const struct sock *sk)
++{ return false; }
++static inline bool fastopen_cookie_present(struct tcp_fastopen_cookie *foc)
++{ return false; }
++static inline int fastopen_init_queue(struct sock *sk, int backlog)
++{ return 0; }
++#endif
++
  #endif	/* _LINUX_TCP_H */
-diff -Nur linux-3.15-rc7/include/net/request_sock.h linux-3.15-rc7.orig/include/net/request_sock.h
---- linux-3.15-rc7/include/net/request_sock.h	2014-05-30 10:01:47.000000000 +0200
-+++ linux-3.15-rc7.orig/include/net/request_sock.h	2014-05-26 01:06:00.000000000 +0200
-@@ -168,13 +168,8 @@
+diff -Nur linux-3.15-rc7.orig/include/net/request_sock.h linux-3.15-rc7/include/net/request_sock.h
+--- linux-3.15-rc7.orig/include/net/request_sock.h	2014-05-26 01:06:00.000000000 +0200
++++ linux-3.15-rc7/include/net/request_sock.h	2014-05-31 22:42:49.024605293 +0200
+@@ -168,8 +168,13 @@
  
  void __reqsk_queue_destroy(struct request_sock_queue *queue);
  void reqsk_queue_destroy(struct request_sock_queue *queue);
--#ifdef CONFIG_TCP_FASTOPEN
++#ifdef CONFIG_TCP_FASTOPEN
  void reqsk_fastopen_remove(struct sock *sk, struct request_sock *req,
  			   bool reset);
--#else
--static inline void reqsk_fastopen_remove(struct sock *sk, struct request_sock *req,
--			   bool reset) {}
--#endif
++#else
++static inline void reqsk_fastopen_remove(struct sock *sk, struct request_sock *req,
++			   bool reset) {}
++#endif
  
  static inline struct request_sock *
  	reqsk_queue_yank_acceptq(struct request_sock_queue *queue)
-diff -Nur linux-3.15-rc7/include/net/tcp.h linux-3.15-rc7.orig/include/net/tcp.h
---- linux-3.15-rc7/include/net/tcp.h	2014-05-30 10:01:47.000000000 +0200
-+++ linux-3.15-rc7.orig/include/net/tcp.h	2014-05-26 01:06:00.000000000 +0200
-@@ -251,11 +251,7 @@
+diff -Nur linux-3.15-rc7.orig/include/net/tcp.h linux-3.15-rc7/include/net/tcp.h
+--- linux-3.15-rc7.orig/include/net/tcp.h	2014-05-26 01:06:00.000000000 +0200
++++ linux-3.15-rc7/include/net/tcp.h	2014-05-31 22:42:49.028605326 +0200
+@@ -251,7 +251,11 @@
  extern int sysctl_tcp_retries2;
  extern int sysctl_tcp_orphan_retries;
  extern int sysctl_tcp_syncookies;
--#ifdef CONFIG_TCP_FASTOPEN
++#ifdef CONFIG_TCP_FASTOPEN
  extern int sysctl_tcp_fastopen;
--#else
--#define sysctl_tcp_fastopen 0
--#endif
++#else
++#define sysctl_tcp_fastopen 0
++#endif
  extern int sysctl_tcp_retrans_collapse;
  extern int sysctl_tcp_stdurg;
  extern int sysctl_tcp_rfc1337;
-@@ -1312,12 +1308,7 @@
+@@ -1308,7 +1312,12 @@
  	size_t				size;
  	int				copied;	/* queued in tcp_connect() */
  };
--
--#ifdef CONFIG_TCP_FASTOPEN
++
++#ifdef CONFIG_TCP_FASTOPEN
  void tcp_free_fastopen_req(struct tcp_sock *tp);
--#else
--static inline void tcp_free_fastopen_req(struct tcp_sock *tp) {}
--#endif
++#else
++static inline void tcp_free_fastopen_req(struct tcp_sock *tp) {}
++#endif
  
  extern struct tcp_fastopen_context __rcu *tcp_fastopen_ctx;
  int tcp_fastopen_reset_cipher(void *key, unsigned int len);
-diff -Nur linux-3.15-rc7/net/Kconfig linux-3.15-rc7.orig/net/Kconfig
---- linux-3.15-rc7/net/Kconfig	2014-05-30 10:01:47.000000000 +0200
-+++ linux-3.15-rc7.orig/net/Kconfig	2014-05-26 01:06:00.000000000 +0200
-@@ -53,8 +53,8 @@
- 
- config INET
- 	bool "TCP/IP networking"
--	select CRYPTO if TCP_FASTOPEN
--	select CRYPTO_AES if TCP_FASTOPEN
-+	select CRYPTO
-+	select CRYPTO_AES
- 	---help---
- 	  These are the protocols used on the Internet and on most local
- 	  Ethernets. It is highly recommended to say Y here (this will enlarge
-diff -Nur linux-3.15-rc7/net/core/request_sock.c linux-3.15-rc7.orig/net/core/request_sock.c
---- linux-3.15-rc7/net/core/request_sock.c	2014-05-30 10:01:47.000000000 +0200
-+++ linux-3.15-rc7.orig/net/core/request_sock.c	2014-05-26 01:06:00.000000000 +0200
-@@ -131,7 +131,6 @@
+diff -Nur linux-3.15-rc7.orig/include/net/tcp.h.orig linux-3.15-rc7/include/net/tcp.h.orig
+--- linux-3.15-rc7.orig/include/net/tcp.h.orig	1970-01-01 01:00:00.000000000 +0100
++++ linux-3.15-rc7/include/net/tcp.h.orig	2014-05-26 01:06:00.000000000 +0200
+@@ -0,0 +1,1600 @@
++/*
++ * INET		An implementation of the TCP/IP protocol suite for the LINUX
++ *		operating system.  INET is implemented using the  BSD Socket
++ *		interface as the means of communication with the user level.
++ *
++ *		Definitions for the TCP module.
++ *
++ * Version:	@(#)tcp.h	1.0.5	05/23/93
++ *
++ * Authors:	Ross Biro
++ *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
++ *
++ *		This program is free software; you can redistribute it and/or
++ *		modify it under the terms of the GNU General Public License
++ *		as published by the Free Software Foundation; either version
++ *		2 of the License, or (at your option) any later version.
++ */
++#ifndef _TCP_H
++#define _TCP_H
++
++#define FASTRETRANS_DEBUG 1
++
++#include <linux/list.h>
++#include <linux/tcp.h>
++#include <linux/bug.h>
++#include <linux/slab.h>
++#include <linux/cache.h>
++#include <linux/percpu.h>
++#include <linux/skbuff.h>
++#include <linux/dmaengine.h>
++#include <linux/crypto.h>
++#include <linux/cryptohash.h>
++#include <linux/kref.h>
++#include <linux/ktime.h>
++
++#include <net/inet_connection_sock.h>
++#include <net/inet_timewait_sock.h>
++#include <net/inet_hashtables.h>
++#include <net/checksum.h>
++#include <net/request_sock.h>
++#include <net/sock.h>
++#include <net/snmp.h>
++#include <net/ip.h>
++#include <net/tcp_states.h>
++#include <net/inet_ecn.h>
++#include <net/dst.h>
++
++#include <linux/seq_file.h>
++#include <linux/memcontrol.h>
++
++extern struct inet_hashinfo tcp_hashinfo;
++
++extern struct percpu_counter tcp_orphan_count;
++void tcp_time_wait(struct sock *sk, int state, int timeo);
++
++#define MAX_TCP_HEADER	(128 + MAX_HEADER)
++#define MAX_TCP_OPTION_SPACE 40
++
++/* 
++ * Never offer a window over 32767 without using window scaling. Some
++ * poor stacks do signed 16bit maths! 
++ */
++#define MAX_TCP_WINDOW		32767U
++
++/* Minimal accepted MSS. It is (60+60+8) - (20+20). */
++#define TCP_MIN_MSS		88U
++
++/* The least MTU to use for probing */
++#define TCP_BASE_MSS		512
++
++/* After receiving this amount of duplicate ACKs fast retransmit starts. */
++#define TCP_FASTRETRANS_THRESH 3
++
++/* Maximal reordering. */
++#define TCP_MAX_REORDERING	127
++
++/* Maximal number of ACKs sent quickly to accelerate slow-start. */
++#define TCP_MAX_QUICKACKS	16U
++
++/* urg_data states */
++#define TCP_URG_VALID	0x0100
++#define TCP_URG_NOTYET	0x0200
++#define TCP_URG_READ	0x0400
++
++#define TCP_RETR1	3	/*
++				 * This is how many retries it does before it
++				 * tries to figure out if the gateway is
++				 * down. Minimal RFC value is 3; it corresponds
++				 * to ~3sec-8min depending on RTO.
++				 */
++
++#define TCP_RETR2	15	/*
++				 * This should take at least
++				 * 90 minutes to time out.
++				 * RFC1122 says that the limit is 100 sec.
++				 * 15 is ~13-30min depending on RTO.
++				 */
++
++#define TCP_SYN_RETRIES	 6	/* This is how many retries are done
++				 * when active opening a connection.
++				 * RFC1122 says the minimum retry MUST
++				 * be at least 180secs.  Nevertheless
++				 * this value is corresponding to
++				 * 63secs of retransmission with the
++				 * current initial RTO.
++				 */
++
++#define TCP_SYNACK_RETRIES 5	/* This is how may retries are done
++				 * when passive opening a connection.
++				 * This is corresponding to 31secs of
++				 * retransmission with the current
++				 * initial RTO.
++				 */
++
++#define TCP_TIMEWAIT_LEN (60*HZ) /* how long to wait to destroy TIME-WAIT
++				  * state, about 60 seconds	*/
++#define TCP_FIN_TIMEOUT	TCP_TIMEWAIT_LEN
++                                 /* BSD style FIN_WAIT2 deadlock breaker.
++				  * It used to be 3min, new value is 60sec,
++				  * to combine FIN-WAIT-2 timeout with
++				  * TIME-WAIT timer.
++				  */
++
++#define TCP_DELACK_MAX	((unsigned)(HZ/5))	/* maximal time to delay before sending an ACK */
++#if HZ >= 100
++#define TCP_DELACK_MIN	((unsigned)(HZ/25))	/* minimal time to delay before sending an ACK */
++#define TCP_ATO_MIN	((unsigned)(HZ/25))
++#else
++#define TCP_DELACK_MIN	4U
++#define TCP_ATO_MIN	4U
++#endif
++#define TCP_RTO_MAX	((unsigned)(120*HZ))
++#define TCP_RTO_MIN	((unsigned)(HZ/5))
++#define TCP_TIMEOUT_INIT ((unsigned)(1*HZ))	/* RFC6298 2.1 initial RTO value	*/
++#define TCP_TIMEOUT_FALLBACK ((unsigned)(3*HZ))	/* RFC 1122 initial RTO value, now
++						 * used as a fallback RTO for the
++						 * initial data transmission if no
++						 * valid RTT sample has been acquired,
++						 * most likely due to retrans in 3WHS.
++						 */
++
++#define TCP_RESOURCE_PROBE_INTERVAL ((unsigned)(HZ/2U)) /* Maximal interval between probes
++					                 * for local resources.
++					                 */
++
++#define TCP_KEEPALIVE_TIME	(120*60*HZ)	/* two hours */
++#define TCP_KEEPALIVE_PROBES	9		/* Max of 9 keepalive probes	*/
++#define TCP_KEEPALIVE_INTVL	(75*HZ)
++
++#define MAX_TCP_KEEPIDLE	32767
++#define MAX_TCP_KEEPINTVL	32767
++#define MAX_TCP_KEEPCNT		127
++#define MAX_TCP_SYNCNT		127
++
++#define TCP_SYNQ_INTERVAL	(HZ/5)	/* Period of SYNACK timer */
++
++#define TCP_PAWS_24DAYS	(60 * 60 * 24 * 24)
++#define TCP_PAWS_MSL	60		/* Per-host timestamps are invalidated
++					 * after this time. It should be equal
++					 * (or greater than) TCP_TIMEWAIT_LEN
++					 * to provide reliability equal to one
++					 * provided by timewait state.
++					 */
++#define TCP_PAWS_WINDOW	1		/* Replay window for per-host
++					 * timestamps. It must be less than
++					 * minimal timewait lifetime.
++					 */
++/*
++ *	TCP option
++ */
++ 
++#define TCPOPT_NOP		1	/* Padding */
++#define TCPOPT_EOL		0	/* End of options */
++#define TCPOPT_MSS		2	/* Segment size negotiating */
++#define TCPOPT_WINDOW		3	/* Window scaling */
++#define TCPOPT_SACK_PERM        4       /* SACK Permitted */
++#define TCPOPT_SACK             5       /* SACK Block */
++#define TCPOPT_TIMESTAMP	8	/* Better RTT estimations/PAWS */
++#define TCPOPT_MD5SIG		19	/* MD5 Signature (RFC2385) */
++#define TCPOPT_EXP		254	/* Experimental */
++/* Magic number to be after the option value for sharing TCP
++ * experimental options. See draft-ietf-tcpm-experimental-options-00.txt
++ */
++#define TCPOPT_FASTOPEN_MAGIC	0xF989
++
++/*
++ *     TCP option lengths
++ */
++
++#define TCPOLEN_MSS            4
++#define TCPOLEN_WINDOW         3
++#define TCPOLEN_SACK_PERM      2
++#define TCPOLEN_TIMESTAMP      10
++#define TCPOLEN_MD5SIG         18
++#define TCPOLEN_EXP_FASTOPEN_BASE  4
++
++/* But this is what stacks really send out. */
++#define TCPOLEN_TSTAMP_ALIGNED		12
++#define TCPOLEN_WSCALE_ALIGNED		4
++#define TCPOLEN_SACKPERM_ALIGNED	4
++#define TCPOLEN_SACK_BASE		2
++#define TCPOLEN_SACK_BASE_ALIGNED	4
++#define TCPOLEN_SACK_PERBLOCK		8
++#define TCPOLEN_MD5SIG_ALIGNED		20
++#define TCPOLEN_MSS_ALIGNED		4
++
++/* Flags in tp->nonagle */
++#define TCP_NAGLE_OFF		1	/* Nagle's algo is disabled */
++#define TCP_NAGLE_CORK		2	/* Socket is corked	    */
++#define TCP_NAGLE_PUSH		4	/* Cork is overridden for already queued data */
++
++/* TCP thin-stream limits */
++#define TCP_THIN_LINEAR_RETRIES 6       /* After 6 linear retries, do exp. backoff */
++
++/* TCP initial congestion window as per draft-hkchu-tcpm-initcwnd-01 */
++#define TCP_INIT_CWND		10
++
++/* Bit Flags for sysctl_tcp_fastopen */
++#define	TFO_CLIENT_ENABLE	1
++#define	TFO_SERVER_ENABLE	2
++#define	TFO_CLIENT_NO_COOKIE	4	/* Data in SYN w/o cookie option */
++
++/* Process SYN data but skip cookie validation */
++#define	TFO_SERVER_COOKIE_NOT_CHKED	0x100
++/* Accept SYN data w/o any cookie option */
++#define	TFO_SERVER_COOKIE_NOT_REQD	0x200
++
++/* Force enable TFO on all listeners, i.e., not requiring the
++ * TCP_FASTOPEN socket option. SOCKOPT1/2 determine how to set max_qlen.
++ */
++#define	TFO_SERVER_WO_SOCKOPT1	0x400
++#define	TFO_SERVER_WO_SOCKOPT2	0x800
++/* Always create TFO child sockets on a TFO listener even when
++ * cookie/data not present. (For testing purpose!)
++ */
++#define	TFO_SERVER_ALWAYS	0x1000
++
++extern struct inet_timewait_death_row tcp_death_row;
++
++/* sysctl variables for tcp */
++extern int sysctl_tcp_timestamps;
++extern int sysctl_tcp_window_scaling;
++extern int sysctl_tcp_sack;
++extern int sysctl_tcp_fin_timeout;
++extern int sysctl_tcp_keepalive_time;
++extern int sysctl_tcp_keepalive_probes;
++extern int sysctl_tcp_keepalive_intvl;
++extern int sysctl_tcp_syn_retries;
++extern int sysctl_tcp_synack_retries;
++extern int sysctl_tcp_retries1;
++extern int sysctl_tcp_retries2;
++extern int sysctl_tcp_orphan_retries;
++extern int sysctl_tcp_syncookies;
++extern int sysctl_tcp_fastopen;
++extern int sysctl_tcp_retrans_collapse;
++extern int sysctl_tcp_stdurg;
++extern int sysctl_tcp_rfc1337;
++extern int sysctl_tcp_abort_on_overflow;
++extern int sysctl_tcp_max_orphans;
++extern int sysctl_tcp_fack;
++extern int sysctl_tcp_reordering;
++extern int sysctl_tcp_dsack;
++extern long sysctl_tcp_mem[3];
++extern int sysctl_tcp_wmem[3];
++extern int sysctl_tcp_rmem[3];
++extern int sysctl_tcp_app_win;
++extern int sysctl_tcp_adv_win_scale;
++extern int sysctl_tcp_tw_reuse;
++extern int sysctl_tcp_frto;
++extern int sysctl_tcp_low_latency;
++extern int sysctl_tcp_dma_copybreak;
++extern int sysctl_tcp_nometrics_save;
++extern int sysctl_tcp_moderate_rcvbuf;
++extern int sysctl_tcp_tso_win_divisor;
++extern int sysctl_tcp_mtu_probing;
++extern int sysctl_tcp_base_mss;
++extern int sysctl_tcp_workaround_signed_windows;
++extern int sysctl_tcp_slow_start_after_idle;
++extern int sysctl_tcp_thin_linear_timeouts;
++extern int sysctl_tcp_thin_dupack;
++extern int sysctl_tcp_early_retrans;
++extern int sysctl_tcp_limit_output_bytes;
++extern int sysctl_tcp_challenge_ack_limit;
++extern unsigned int sysctl_tcp_notsent_lowat;
++extern int sysctl_tcp_min_tso_segs;
++extern int sysctl_tcp_autocorking;
++
++extern atomic_long_t tcp_memory_allocated;
++extern struct percpu_counter tcp_sockets_allocated;
++extern int tcp_memory_pressure;
++
++/*
++ * The next routines deal with comparing 32 bit unsigned ints
++ * and worry about wraparound (automatic with unsigned arithmetic).
++ */
++
++static inline bool before(__u32 seq1, __u32 seq2)
++{
++        return (__s32)(seq1-seq2) < 0;
++}
++#define after(seq2, seq1) 	before(seq1, seq2)
++
++/* is s2<=s1<=s3 ? */
++static inline bool between(__u32 seq1, __u32 seq2, __u32 seq3)
++{
++	return seq3 - seq2 >= seq1 - seq2;
++}
++
++static inline bool tcp_out_of_memory(struct sock *sk)
++{
++	if (sk->sk_wmem_queued > SOCK_MIN_SNDBUF &&
++	    sk_memory_allocated(sk) > sk_prot_mem_limits(sk, 2))
++		return true;
++	return false;
++}
++
++static inline bool tcp_too_many_orphans(struct sock *sk, int shift)
++{
++	struct percpu_counter *ocp = sk->sk_prot->orphan_count;
++	int orphans = percpu_counter_read_positive(ocp);
++
++	if (orphans << shift > sysctl_tcp_max_orphans) {
++		orphans = percpu_counter_sum_positive(ocp);
++		if (orphans << shift > sysctl_tcp_max_orphans)
++			return true;
++	}
++	return false;
++}
++
++bool tcp_check_oom(struct sock *sk, int shift);
++
++/* syncookies: remember time of last synqueue overflow */
++static inline void tcp_synq_overflow(struct sock *sk)
++{
++	tcp_sk(sk)->rx_opt.ts_recent_stamp = jiffies;
++}
++
++/* syncookies: no recent synqueue overflow on this listening socket? */
++static inline bool tcp_synq_no_recent_overflow(const struct sock *sk)
++{
++	unsigned long last_overflow = tcp_sk(sk)->rx_opt.ts_recent_stamp;
++	return time_after(jiffies, last_overflow + TCP_TIMEOUT_FALLBACK);
++}
++
++extern struct proto tcp_prot;
++
++#define TCP_INC_STATS(net, field)	SNMP_INC_STATS((net)->mib.tcp_statistics, field)
++#define TCP_INC_STATS_BH(net, field)	SNMP_INC_STATS_BH((net)->mib.tcp_statistics, field)
++#define TCP_DEC_STATS(net, field)	SNMP_DEC_STATS((net)->mib.tcp_statistics, field)
++#define TCP_ADD_STATS_USER(net, field, val) SNMP_ADD_STATS_USER((net)->mib.tcp_statistics, field, val)
++#define TCP_ADD_STATS(net, field, val)	SNMP_ADD_STATS((net)->mib.tcp_statistics, field, val)
++
++void tcp_tasklet_init(void);
++
++void tcp_v4_err(struct sk_buff *skb, u32);
++
++void tcp_shutdown(struct sock *sk, int how);
++
++void tcp_v4_early_demux(struct sk_buff *skb);
++int tcp_v4_rcv(struct sk_buff *skb);
++
++int tcp_v4_tw_remember_stamp(struct inet_timewait_sock *tw);
++int tcp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
++		size_t size);
++int tcp_sendpage(struct sock *sk, struct page *page, int offset, size_t size,
++		 int flags);
++void tcp_release_cb(struct sock *sk);
++void tcp_wfree(struct sk_buff *skb);
++void tcp_write_timer_handler(struct sock *sk);
++void tcp_delack_timer_handler(struct sock *sk);
++int tcp_ioctl(struct sock *sk, int cmd, unsigned long arg);
++int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
++			  const struct tcphdr *th, unsigned int len);
++void tcp_rcv_established(struct sock *sk, struct sk_buff *skb,
++			 const struct tcphdr *th, unsigned int len);
++void tcp_rcv_space_adjust(struct sock *sk);
++void tcp_cleanup_rbuf(struct sock *sk, int copied);
++int tcp_twsk_unique(struct sock *sk, struct sock *sktw, void *twp);
++void tcp_twsk_destructor(struct sock *sk);
++ssize_t tcp_splice_read(struct socket *sk, loff_t *ppos,
++			struct pipe_inode_info *pipe, size_t len,
++			unsigned int flags);
++
++static inline void tcp_dec_quickack_mode(struct sock *sk,
++					 const unsigned int pkts)
++{
++	struct inet_connection_sock *icsk = inet_csk(sk);
++
++	if (icsk->icsk_ack.quick) {
++		if (pkts >= icsk->icsk_ack.quick) {
++			icsk->icsk_ack.quick = 0;
++			/* Leaving quickack mode we deflate ATO. */
++			icsk->icsk_ack.ato   = TCP_ATO_MIN;
++		} else
++			icsk->icsk_ack.quick -= pkts;
++	}
++}
++
++#define	TCP_ECN_OK		1
++#define	TCP_ECN_QUEUE_CWR	2
++#define	TCP_ECN_DEMAND_CWR	4
++#define	TCP_ECN_SEEN		8
++
++enum tcp_tw_status {
++	TCP_TW_SUCCESS = 0,
++	TCP_TW_RST = 1,
++	TCP_TW_ACK = 2,
++	TCP_TW_SYN = 3
++};
++
++
++enum tcp_tw_status tcp_timewait_state_process(struct inet_timewait_sock *tw,
++					      struct sk_buff *skb,
++					      const struct tcphdr *th);
++struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb,
++			   struct request_sock *req, struct request_sock **prev,
++			   bool fastopen);
++int tcp_child_process(struct sock *parent, struct sock *child,
++		      struct sk_buff *skb);
++void tcp_enter_loss(struct sock *sk, int how);
++void tcp_clear_retrans(struct tcp_sock *tp);
++void tcp_update_metrics(struct sock *sk);
++void tcp_init_metrics(struct sock *sk);
++void tcp_metrics_init(void);
++bool tcp_peer_is_proven(struct request_sock *req, struct dst_entry *dst,
++			bool paws_check);
++bool tcp_remember_stamp(struct sock *sk);
++bool tcp_tw_remember_stamp(struct inet_timewait_sock *tw);
++void tcp_fetch_timewait_stamp(struct sock *sk, struct dst_entry *dst);
++void tcp_disable_fack(struct tcp_sock *tp);
++void tcp_close(struct sock *sk, long timeout);
++void tcp_init_sock(struct sock *sk);
++unsigned int tcp_poll(struct file *file, struct socket *sock,
++		      struct poll_table_struct *wait);
++int tcp_getsockopt(struct sock *sk, int level, int optname,
++		   char __user *optval, int __user *optlen);
++int tcp_setsockopt(struct sock *sk, int level, int optname,
++		   char __user *optval, unsigned int optlen);
++int compat_tcp_getsockopt(struct sock *sk, int level, int optname,
++			  char __user *optval, int __user *optlen);
++int compat_tcp_setsockopt(struct sock *sk, int level, int optname,
++			  char __user *optval, unsigned int optlen);
++void tcp_set_keepalive(struct sock *sk, int val);
++void tcp_syn_ack_timeout(struct sock *sk, struct request_sock *req);
++int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
++		size_t len, int nonblock, int flags, int *addr_len);
++void tcp_parse_options(const struct sk_buff *skb,
++		       struct tcp_options_received *opt_rx,
++		       int estab, struct tcp_fastopen_cookie *foc);
++const u8 *tcp_parse_md5sig_option(const struct tcphdr *th);
++
++/*
++ *	TCP v4 functions exported for the inet6 API
++ */
++
++void tcp_v4_send_check(struct sock *sk, struct sk_buff *skb);
++int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb);
++struct sock *tcp_create_openreq_child(struct sock *sk,
++				      struct request_sock *req,
++				      struct sk_buff *skb);
++struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
++				  struct request_sock *req,
++				  struct dst_entry *dst);
++int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb);
++int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len);
++int tcp_connect(struct sock *sk);
++struct sk_buff *tcp_make_synack(struct sock *sk, struct dst_entry *dst,
++				struct request_sock *req,
++				struct tcp_fastopen_cookie *foc);
++int tcp_disconnect(struct sock *sk, int flags);
++
++void tcp_finish_connect(struct sock *sk, struct sk_buff *skb);
++int tcp_send_rcvq(struct sock *sk, struct msghdr *msg, size_t size);
++void inet_sk_rx_dst_set(struct sock *sk, const struct sk_buff *skb);
++
++/* From syncookies.c */
++int __cookie_v4_check(const struct iphdr *iph, const struct tcphdr *th,
++		      u32 cookie);
++struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
++			     struct ip_options *opt);
++#ifdef CONFIG_SYN_COOKIES
++
++/* Syncookies use a monotonic timer which increments every 60 seconds.
++ * This counter is used both as a hash input and partially encoded into
++ * the cookie value.  A cookie is only validated further if the delta
++ * between the current counter value and the encoded one is less than this,
++ * i.e. a sent cookie is valid only at most for 2*60 seconds (or less if
++ * the counter advances immediately after a cookie is generated).
++ */
++#define MAX_SYNCOOKIE_AGE 2
++
++static inline u32 tcp_cookie_time(void)
++{
++	u64 val = get_jiffies_64();
++
++	do_div(val, 60 * HZ);
++	return val;
++}
++
++u32 __cookie_v4_init_sequence(const struct iphdr *iph, const struct tcphdr *th,
++			      u16 *mssp);
++__u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mss);
++#else
++static inline __u32 cookie_v4_init_sequence(struct sock *sk,
++					    struct sk_buff *skb,
++					    __u16 *mss)
++{
++	return 0;
++}
++#endif
++
++__u32 cookie_init_timestamp(struct request_sock *req);
++bool cookie_check_timestamp(struct tcp_options_received *opt, struct net *net,
++			    bool *ecn_ok);
++
++/* From net/ipv6/syncookies.c */
++int __cookie_v6_check(const struct ipv6hdr *iph, const struct tcphdr *th,
++		      u32 cookie);
++struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb);
++#ifdef CONFIG_SYN_COOKIES
++u32 __cookie_v6_init_sequence(const struct ipv6hdr *iph,
++			      const struct tcphdr *th, u16 *mssp);
++__u32 cookie_v6_init_sequence(struct sock *sk, const struct sk_buff *skb,
++			      __u16 *mss);
++#else
++static inline __u32 cookie_v6_init_sequence(struct sock *sk,
++					    struct sk_buff *skb,
++					    __u16 *mss)
++{
++	return 0;
++}
++#endif
++/* tcp_output.c */
++
++void __tcp_push_pending_frames(struct sock *sk, unsigned int cur_mss,
++			       int nonagle);
++bool tcp_may_send_now(struct sock *sk);
++int __tcp_retransmit_skb(struct sock *, struct sk_buff *);
++int tcp_retransmit_skb(struct sock *, struct sk_buff *);
++void tcp_retransmit_timer(struct sock *sk);
++void tcp_xmit_retransmit_queue(struct sock *);
++void tcp_simple_retransmit(struct sock *);
++int tcp_trim_head(struct sock *, struct sk_buff *, u32);
++int tcp_fragment(struct sock *, struct sk_buff *, u32, unsigned int);
++
++void tcp_send_probe0(struct sock *);
++void tcp_send_partial(struct sock *);
++int tcp_write_wakeup(struct sock *);
++void tcp_send_fin(struct sock *sk);
++void tcp_send_active_reset(struct sock *sk, gfp_t priority);
++int tcp_send_synack(struct sock *);
++bool tcp_syn_flood_action(struct sock *sk, const struct sk_buff *skb,
++			  const char *proto);
++void tcp_push_one(struct sock *, unsigned int mss_now);
++void tcp_send_ack(struct sock *sk);
++void tcp_send_delayed_ack(struct sock *sk);
++void tcp_send_loss_probe(struct sock *sk);
++bool tcp_schedule_loss_probe(struct sock *sk);
++
++/* tcp_input.c */
++void tcp_cwnd_application_limited(struct sock *sk);
++void tcp_resume_early_retransmit(struct sock *sk);
++void tcp_rearm_rto(struct sock *sk);
++void tcp_reset(struct sock *sk);
++
++/* tcp_timer.c */
++void tcp_init_xmit_timers(struct sock *);
++static inline void tcp_clear_xmit_timers(struct sock *sk)
++{
++	inet_csk_clear_xmit_timers(sk);
++}
++
++unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu);
++unsigned int tcp_current_mss(struct sock *sk);
++
++/* Bound MSS / TSO packet size with the half of the window */
++static inline int tcp_bound_to_half_wnd(struct tcp_sock *tp, int pktsize)
++{
++	int cutoff;
++
++	/* When peer uses tiny windows, there is no use in packetizing
++	 * to sub-MSS pieces for the sake of SWS or making sure there
++	 * are enough packets in the pipe for fast recovery.
++	 *
++	 * On the other hand, for extremely large MSS devices, handling
++	 * smaller than MSS windows in this way does make sense.
++	 */
++	if (tp->max_window >= 512)
++		cutoff = (tp->max_window >> 1);
++	else
++		cutoff = tp->max_window;
++
++	if (cutoff && pktsize > cutoff)
++		return max_t(int, cutoff, 68U - tp->tcp_header_len);
++	else
++		return pktsize;
++}
++
++/* tcp.c */
++void tcp_get_info(const struct sock *, struct tcp_info *);
++
++/* Read 'sendfile()'-style from a TCP socket */
++typedef int (*sk_read_actor_t)(read_descriptor_t *, struct sk_buff *,
++				unsigned int, size_t);
++int tcp_read_sock(struct sock *sk, read_descriptor_t *desc,
++		  sk_read_actor_t recv_actor);
++
++void tcp_initialize_rcv_mss(struct sock *sk);
++
++int tcp_mtu_to_mss(struct sock *sk, int pmtu);
++int tcp_mss_to_mtu(struct sock *sk, int mss);
++void tcp_mtup_init(struct sock *sk);
++void tcp_init_buffer_space(struct sock *sk);
++
++static inline void tcp_bound_rto(const struct sock *sk)
++{
++	if (inet_csk(sk)->icsk_rto > TCP_RTO_MAX)
++		inet_csk(sk)->icsk_rto = TCP_RTO_MAX;
++}
++
++static inline u32 __tcp_set_rto(const struct tcp_sock *tp)
++{
++	return usecs_to_jiffies((tp->srtt_us >> 3) + tp->rttvar_us);
++}
++
++static inline void __tcp_fast_path_on(struct tcp_sock *tp, u32 snd_wnd)
++{
++	tp->pred_flags = htonl((tp->tcp_header_len << 26) |
++			       ntohl(TCP_FLAG_ACK) |
++			       snd_wnd);
++}
++
++static inline void tcp_fast_path_on(struct tcp_sock *tp)
++{
++	__tcp_fast_path_on(tp, tp->snd_wnd >> tp->rx_opt.snd_wscale);
++}
++
++static inline void tcp_fast_path_check(struct sock *sk)
++{
++	struct tcp_sock *tp = tcp_sk(sk);
++
++	if (skb_queue_empty(&tp->out_of_order_queue) &&
++	    tp->rcv_wnd &&
++	    atomic_read(&sk->sk_rmem_alloc) < sk->sk_rcvbuf &&
++	    !tp->urg_data)
++		tcp_fast_path_on(tp);
++}
++
++/* Compute the actual rto_min value */
++static inline u32 tcp_rto_min(struct sock *sk)
++{
++	const struct dst_entry *dst = __sk_dst_get(sk);
++	u32 rto_min = TCP_RTO_MIN;
++
++	if (dst && dst_metric_locked(dst, RTAX_RTO_MIN))
++		rto_min = dst_metric_rtt(dst, RTAX_RTO_MIN);
++	return rto_min;
++}
++
++static inline u32 tcp_rto_min_us(struct sock *sk)
++{
++	return jiffies_to_usecs(tcp_rto_min(sk));
++}
++
++/* Compute the actual receive window we are currently advertising.
++ * Rcv_nxt can be after the window if our peer push more data
++ * than the offered window.
++ */
++static inline u32 tcp_receive_window(const struct tcp_sock *tp)
++{
++	s32 win = tp->rcv_wup + tp->rcv_wnd - tp->rcv_nxt;
++
++	if (win < 0)
++		win = 0;
++	return (u32) win;
++}
++
++/* Choose a new window, without checks for shrinking, and without
++ * scaling applied to the result.  The caller does these things
++ * if necessary.  This is a "raw" window selection.
++ */
++u32 __tcp_select_window(struct sock *sk);
++
++void tcp_send_window_probe(struct sock *sk);
++
++/* TCP timestamps are only 32-bits, this causes a slight
++ * complication on 64-bit systems since we store a snapshot
++ * of jiffies in the buffer control blocks below.  We decided
++ * to use only the low 32-bits of jiffies and hide the ugly
++ * casts with the following macro.
++ */
++#define tcp_time_stamp		((__u32)(jiffies))
++
++#define tcp_flag_byte(th) (((u_int8_t *)th)[13])
++
++#define TCPHDR_FIN 0x01
++#define TCPHDR_SYN 0x02
++#define TCPHDR_RST 0x04
++#define TCPHDR_PSH 0x08
++#define TCPHDR_ACK 0x10
++#define TCPHDR_URG 0x20
++#define TCPHDR_ECE 0x40
++#define TCPHDR_CWR 0x80
++
++/* This is what the send packet queuing engine uses to pass
++ * TCP per-packet control information to the transmission code.
++ * We also store the host-order sequence numbers in here too.
++ * This is 44 bytes if IPV6 is enabled.
++ * If this grows please adjust skbuff.h:skbuff->cb[xxx] size appropriately.
++ */
++struct tcp_skb_cb {
++	union {
++		struct inet_skb_parm	h4;
++#if IS_ENABLED(CONFIG_IPV6)
++		struct inet6_skb_parm	h6;
++#endif
++	} header;	/* For incoming frames		*/
++	__u32		seq;		/* Starting sequence number	*/
++	__u32		end_seq;	/* SEQ + FIN + SYN + datalen	*/
++	__u32		when;		/* used to compute rtt's	*/
++	__u8		tcp_flags;	/* TCP header flags. (tcp[13])	*/
++
++	__u8		sacked;		/* State flags for SACK/FACK.	*/
++#define TCPCB_SACKED_ACKED	0x01	/* SKB ACK'd by a SACK block	*/
++#define TCPCB_SACKED_RETRANS	0x02	/* SKB retransmitted		*/
++#define TCPCB_LOST		0x04	/* SKB is lost			*/
++#define TCPCB_TAGBITS		0x07	/* All tag bits			*/
++#define TCPCB_EVER_RETRANS	0x80	/* Ever retransmitted frame	*/
++#define TCPCB_RETRANS		(TCPCB_SACKED_RETRANS|TCPCB_EVER_RETRANS)
++
++	__u8		ip_dsfield;	/* IPv4 tos or IPv6 dsfield	*/
++	/* 1 byte hole */
++	__u32		ack_seq;	/* Sequence number ACK'd	*/
++};
++
++#define TCP_SKB_CB(__skb)	((struct tcp_skb_cb *)&((__skb)->cb[0]))
++
++/* RFC3168 : 6.1.1 SYN packets must not have ECT/ECN bits set
++ *
++ * If we receive a SYN packet with these bits set, it means a network is
++ * playing bad games with TOS bits. In order to avoid possible false congestion
++ * notifications, we disable TCP ECN negociation.
++ */
++static inline void
++TCP_ECN_create_request(struct request_sock *req, const struct sk_buff *skb,
++		struct net *net)
++{
++	const struct tcphdr *th = tcp_hdr(skb);
++
++	if (net->ipv4.sysctl_tcp_ecn && th->ece && th->cwr &&
++	    INET_ECN_is_not_ect(TCP_SKB_CB(skb)->ip_dsfield))
++		inet_rsk(req)->ecn_ok = 1;
++}
++
++/* Due to TSO, an SKB can be composed of multiple actual
++ * packets.  To keep these tracked properly, we use this.
++ */
++static inline int tcp_skb_pcount(const struct sk_buff *skb)
++{
++	return skb_shinfo(skb)->gso_segs;
++}
++
++/* This is valid iff tcp_skb_pcount() > 1. */
++static inline int tcp_skb_mss(const struct sk_buff *skb)
++{
++	return skb_shinfo(skb)->gso_size;
++}
++
++/* Events passed to congestion control interface */
++enum tcp_ca_event {
++	CA_EVENT_TX_START,	/* first transmit when no packets in flight */
++	CA_EVENT_CWND_RESTART,	/* congestion window restart */
++	CA_EVENT_COMPLETE_CWR,	/* end of congestion recovery */
++	CA_EVENT_LOSS,		/* loss timeout */
++	CA_EVENT_FAST_ACK,	/* in sequence ack */
++	CA_EVENT_SLOW_ACK,	/* other ack */
++};
++
++/*
++ * Interface for adding new TCP congestion control handlers
++ */
++#define TCP_CA_NAME_MAX	16
++#define TCP_CA_MAX	128
++#define TCP_CA_BUF_MAX	(TCP_CA_NAME_MAX*TCP_CA_MAX)
++
++#define TCP_CONG_NON_RESTRICTED 0x1
++
++struct tcp_congestion_ops {
++	struct list_head	list;
++	unsigned long flags;
++
++	/* initialize private data (optional) */
++	void (*init)(struct sock *sk);
++	/* cleanup private data  (optional) */
++	void (*release)(struct sock *sk);
++
++	/* return slow start threshold (required) */
++	u32 (*ssthresh)(struct sock *sk);
++	/* do new cwnd calculation (required) */
++	void (*cong_avoid)(struct sock *sk, u32 ack, u32 acked, u32 in_flight);
++	/* call before changing ca_state (optional) */
++	void (*set_state)(struct sock *sk, u8 new_state);
++	/* call when cwnd event occurs (optional) */
++	void (*cwnd_event)(struct sock *sk, enum tcp_ca_event ev);
++	/* new value of cwnd after loss (optional) */
++	u32  (*undo_cwnd)(struct sock *sk);
++	/* hook for packet ack accounting (optional) */
++	void (*pkts_acked)(struct sock *sk, u32 num_acked, s32 rtt_us);
++	/* get info for inet_diag (optional) */
++	void (*get_info)(struct sock *sk, u32 ext, struct sk_buff *skb);
++
++	char 		name[TCP_CA_NAME_MAX];
++	struct module 	*owner;
++};
++
++int tcp_register_congestion_control(struct tcp_congestion_ops *type);
++void tcp_unregister_congestion_control(struct tcp_congestion_ops *type);
++
++void tcp_init_congestion_control(struct sock *sk);
++void tcp_cleanup_congestion_control(struct sock *sk);
++int tcp_set_default_congestion_control(const char *name);
++void tcp_get_default_congestion_control(char *name);
++void tcp_get_available_congestion_control(char *buf, size_t len);
++void tcp_get_allowed_congestion_control(char *buf, size_t len);
++int tcp_set_allowed_congestion_control(char *allowed);
++int tcp_set_congestion_control(struct sock *sk, const char *name);
++int tcp_slow_start(struct tcp_sock *tp, u32 acked);
++void tcp_cong_avoid_ai(struct tcp_sock *tp, u32 w);
++
++extern struct tcp_congestion_ops tcp_init_congestion_ops;
++u32 tcp_reno_ssthresh(struct sock *sk);
++void tcp_reno_cong_avoid(struct sock *sk, u32 ack, u32 acked, u32 in_flight);
++extern struct tcp_congestion_ops tcp_reno;
++
++static inline void tcp_set_ca_state(struct sock *sk, const u8 ca_state)
++{
++	struct inet_connection_sock *icsk = inet_csk(sk);
++
++	if (icsk->icsk_ca_ops->set_state)
++		icsk->icsk_ca_ops->set_state(sk, ca_state);
++	icsk->icsk_ca_state = ca_state;
++}
++
++static inline void tcp_ca_event(struct sock *sk, const enum tcp_ca_event event)
++{
++	const struct inet_connection_sock *icsk = inet_csk(sk);
++
++	if (icsk->icsk_ca_ops->cwnd_event)
++		icsk->icsk_ca_ops->cwnd_event(sk, event);
++}
++
++/* These functions determine how the current flow behaves in respect of SACK
++ * handling. SACK is negotiated with the peer, and therefore it can vary
++ * between different flows.
++ *
++ * tcp_is_sack - SACK enabled
++ * tcp_is_reno - No SACK
++ * tcp_is_fack - FACK enabled, implies SACK enabled
++ */
++static inline int tcp_is_sack(const struct tcp_sock *tp)
++{
++	return tp->rx_opt.sack_ok;
++}
++
++static inline bool tcp_is_reno(const struct tcp_sock *tp)
++{
++	return !tcp_is_sack(tp);
++}
++
++static inline bool tcp_is_fack(const struct tcp_sock *tp)
++{
++	return tp->rx_opt.sack_ok & TCP_FACK_ENABLED;
++}
++
++static inline void tcp_enable_fack(struct tcp_sock *tp)
++{
++	tp->rx_opt.sack_ok |= TCP_FACK_ENABLED;
++}
++
++/* TCP early-retransmit (ER) is similar to but more conservative than
++ * the thin-dupack feature.  Enable ER only if thin-dupack is disabled.
++ */
++static inline void tcp_enable_early_retrans(struct tcp_sock *tp)
++{
++	tp->do_early_retrans = sysctl_tcp_early_retrans &&
++		sysctl_tcp_early_retrans < 4 && !sysctl_tcp_thin_dupack &&
++		sysctl_tcp_reordering == 3;
++}
++
++static inline void tcp_disable_early_retrans(struct tcp_sock *tp)
++{
++	tp->do_early_retrans = 0;
++}
++
++static inline unsigned int tcp_left_out(const struct tcp_sock *tp)
++{
++	return tp->sacked_out + tp->lost_out;
++}
++
++/* This determines how many packets are "in the network" to the best
++ * of our knowledge.  In many cases it is conservative, but where
++ * detailed information is available from the receiver (via SACK
++ * blocks etc.) we can make more aggressive calculations.
++ *
++ * Use this for decisions involving congestion control, use just
++ * tp->packets_out to determine if the send queue is empty or not.
++ *
++ * Read this equation as:
++ *
++ *	"Packets sent once on transmission queue" MINUS
++ *	"Packets left network, but not honestly ACKed yet" PLUS
++ *	"Packets fast retransmitted"
++ */
++static inline unsigned int tcp_packets_in_flight(const struct tcp_sock *tp)
++{
++	return tp->packets_out - tcp_left_out(tp) + tp->retrans_out;
++}
++
++#define TCP_INFINITE_SSTHRESH	0x7fffffff
++
++static inline bool tcp_in_initial_slowstart(const struct tcp_sock *tp)
++{
++	return tp->snd_ssthresh >= TCP_INFINITE_SSTHRESH;
++}
++
++static inline bool tcp_in_cwnd_reduction(const struct sock *sk)
++{
++	return (TCPF_CA_CWR | TCPF_CA_Recovery) &
++	       (1 << inet_csk(sk)->icsk_ca_state);
++}
++
++/* If cwnd > ssthresh, we may raise ssthresh to be half-way to cwnd.
++ * The exception is cwnd reduction phase, when cwnd is decreasing towards
++ * ssthresh.
++ */
++static inline __u32 tcp_current_ssthresh(const struct sock *sk)
++{
++	const struct tcp_sock *tp = tcp_sk(sk);
++
++	if (tcp_in_cwnd_reduction(sk))
++		return tp->snd_ssthresh;
++	else
++		return max(tp->snd_ssthresh,
++			   ((tp->snd_cwnd >> 1) +
++			    (tp->snd_cwnd >> 2)));
++}
++
++/* Use define here intentionally to get WARN_ON location shown at the caller */
++#define tcp_verify_left_out(tp)	WARN_ON(tcp_left_out(tp) > tp->packets_out)
++
++void tcp_enter_cwr(struct sock *sk, const int set_ssthresh);
++__u32 tcp_init_cwnd(const struct tcp_sock *tp, const struct dst_entry *dst);
++
++/* The maximum number of MSS of available cwnd for which TSO defers
++ * sending if not using sysctl_tcp_tso_win_divisor.
++ */
++static inline __u32 tcp_max_tso_deferred_mss(const struct tcp_sock *tp)
++{
++	return 3;
++}
++
++/* Slow start with delack produces 3 packets of burst, so that
++ * it is safe "de facto".  This will be the default - same as
++ * the default reordering threshold - but if reordering increases,
++ * we must be able to allow cwnd to burst at least this much in order
++ * to not pull it back when holes are filled.
++ */
++static __inline__ __u32 tcp_max_burst(const struct tcp_sock *tp)
++{
++	return tp->reordering;
++}
++
++/* Returns end sequence number of the receiver's advertised window */
++static inline u32 tcp_wnd_end(const struct tcp_sock *tp)
++{
++	return tp->snd_una + tp->snd_wnd;
++}
++bool tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight);
++
++static inline void tcp_check_probe_timer(struct sock *sk)
++{
++	const struct tcp_sock *tp = tcp_sk(sk);
++	const struct inet_connection_sock *icsk = inet_csk(sk);
++
++	if (!tp->packets_out && !icsk->icsk_pending)
++		inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0,
++					  icsk->icsk_rto, TCP_RTO_MAX);
++}
++
++static inline void tcp_init_wl(struct tcp_sock *tp, u32 seq)
++{
++	tp->snd_wl1 = seq;
++}
++
++static inline void tcp_update_wl(struct tcp_sock *tp, u32 seq)
++{
++	tp->snd_wl1 = seq;
++}
++
++/*
++ * Calculate(/check) TCP checksum
++ */
++static inline __sum16 tcp_v4_check(int len, __be32 saddr,
++				   __be32 daddr, __wsum base)
++{
++	return csum_tcpudp_magic(saddr,daddr,len,IPPROTO_TCP,base);
++}
++
++static inline __sum16 __tcp_checksum_complete(struct sk_buff *skb)
++{
++	return __skb_checksum_complete(skb);
++}
++
++static inline bool tcp_checksum_complete(struct sk_buff *skb)
++{
++	return !skb_csum_unnecessary(skb) &&
++		__tcp_checksum_complete(skb);
++}
++
++/* Prequeue for VJ style copy to user, combined with checksumming. */
++
++static inline void tcp_prequeue_init(struct tcp_sock *tp)
++{
++	tp->ucopy.task = NULL;
++	tp->ucopy.len = 0;
++	tp->ucopy.memory = 0;
++	skb_queue_head_init(&tp->ucopy.prequeue);
++#ifdef CONFIG_NET_DMA
++	tp->ucopy.dma_chan = NULL;
++	tp->ucopy.wakeup = 0;
++	tp->ucopy.pinned_list = NULL;
++	tp->ucopy.dma_cookie = 0;
++#endif
++}
++
++bool tcp_prequeue(struct sock *sk, struct sk_buff *skb);
++
++#undef STATE_TRACE
++
++#ifdef STATE_TRACE
++static const char *statename[]={
++	"Unused","Established","Syn Sent","Syn Recv",
++	"Fin Wait 1","Fin Wait 2","Time Wait", "Close",
++	"Close Wait","Last ACK","Listen","Closing"
++};
++#endif
++void tcp_set_state(struct sock *sk, int state);
++
++void tcp_done(struct sock *sk);
++
++static inline void tcp_sack_reset(struct tcp_options_received *rx_opt)
++{
++	rx_opt->dsack = 0;
++	rx_opt->num_sacks = 0;
++}
++
++u32 tcp_default_init_rwnd(u32 mss);
++
++/* Determine a window scaling and initial window to offer. */
++void tcp_select_initial_window(int __space, __u32 mss, __u32 *rcv_wnd,
++			       __u32 *window_clamp, int wscale_ok,
++			       __u8 *rcv_wscale, __u32 init_rcv_wnd);
++
++static inline int tcp_win_from_space(int space)
++{
++	return sysctl_tcp_adv_win_scale<=0 ?
++		(space>>(-sysctl_tcp_adv_win_scale)) :
++		space - (space>>sysctl_tcp_adv_win_scale);
++}
++
++/* Note: caller must be prepared to deal with negative returns */ 
++static inline int tcp_space(const struct sock *sk)
++{
++	return tcp_win_from_space(sk->sk_rcvbuf -
++				  atomic_read(&sk->sk_rmem_alloc));
++} 
++
++static inline int tcp_full_space(const struct sock *sk)
++{
++	return tcp_win_from_space(sk->sk_rcvbuf); 
++}
++
++static inline void tcp_openreq_init(struct request_sock *req,
++				    struct tcp_options_received *rx_opt,
++				    struct sk_buff *skb)
++{
++	struct inet_request_sock *ireq = inet_rsk(req);
++
++	req->rcv_wnd = 0;		/* So that tcp_send_synack() knows! */
++	req->cookie_ts = 0;
++	tcp_rsk(req)->rcv_isn = TCP_SKB_CB(skb)->seq;
++	tcp_rsk(req)->rcv_nxt = TCP_SKB_CB(skb)->seq + 1;
++	tcp_rsk(req)->snt_synack = 0;
++	req->mss = rx_opt->mss_clamp;
++	req->ts_recent = rx_opt->saw_tstamp ? rx_opt->rcv_tsval : 0;
++	ireq->tstamp_ok = rx_opt->tstamp_ok;
++	ireq->sack_ok = rx_opt->sack_ok;
++	ireq->snd_wscale = rx_opt->snd_wscale;
++	ireq->wscale_ok = rx_opt->wscale_ok;
++	ireq->acked = 0;
++	ireq->ecn_ok = 0;
++	ireq->ir_rmt_port = tcp_hdr(skb)->source;
++	ireq->ir_num = ntohs(tcp_hdr(skb)->dest);
++}
++
++void tcp_enter_memory_pressure(struct sock *sk);
++
++static inline int keepalive_intvl_when(const struct tcp_sock *tp)
++{
++	return tp->keepalive_intvl ? : sysctl_tcp_keepalive_intvl;
++}
++
++static inline int keepalive_time_when(const struct tcp_sock *tp)
++{
++	return tp->keepalive_time ? : sysctl_tcp_keepalive_time;
++}
++
++static inline int keepalive_probes(const struct tcp_sock *tp)
++{
++	return tp->keepalive_probes ? : sysctl_tcp_keepalive_probes;
++}
++
++static inline u32 keepalive_time_elapsed(const struct tcp_sock *tp)
++{
++	const struct inet_connection_sock *icsk = &tp->inet_conn;
++
++	return min_t(u32, tcp_time_stamp - icsk->icsk_ack.lrcvtime,
++			  tcp_time_stamp - tp->rcv_tstamp);
++}
++
++static inline int tcp_fin_time(const struct sock *sk)
++{
++	int fin_timeout = tcp_sk(sk)->linger2 ? : sysctl_tcp_fin_timeout;
++	const int rto = inet_csk(sk)->icsk_rto;
++
++	if (fin_timeout < (rto << 2) - (rto >> 1))
++		fin_timeout = (rto << 2) - (rto >> 1);
++
++	return fin_timeout;
++}
++
++static inline bool tcp_paws_check(const struct tcp_options_received *rx_opt,
++				  int paws_win)
++{
++	if ((s32)(rx_opt->ts_recent - rx_opt->rcv_tsval) <= paws_win)
++		return true;
++	if (unlikely(get_seconds() >= rx_opt->ts_recent_stamp + TCP_PAWS_24DAYS))
++		return true;
++	/*
++	 * Some OSes send SYN and SYNACK messages with tsval=0 tsecr=0,
++	 * then following tcp messages have valid values. Ignore 0 value,
++	 * or else 'negative' tsval might forbid us to accept their packets.
++	 */
++	if (!rx_opt->ts_recent)
++		return true;
++	return false;
++}
++
++static inline bool tcp_paws_reject(const struct tcp_options_received *rx_opt,
++				   int rst)
++{
++	if (tcp_paws_check(rx_opt, 0))
++		return false;
++
++	/* RST segments are not recommended to carry timestamp,
++	   and, if they do, it is recommended to ignore PAWS because
++	   "their cleanup function should take precedence over timestamps."
++	   Certainly, it is mistake. It is necessary to understand the reasons
++	   of this constraint to relax it: if peer reboots, clock may go
++	   out-of-sync and half-open connections will not be reset.
++	   Actually, the problem would be not existing if all
++	   the implementations followed draft about maintaining clock
++	   via reboots. Linux-2.2 DOES NOT!
++
++	   However, we can relax time bounds for RST segments to MSL.
++	 */
++	if (rst && get_seconds() >= rx_opt->ts_recent_stamp + TCP_PAWS_MSL)
++		return false;
++	return true;
++}
++
++static inline void tcp_mib_init(struct net *net)
++{
++	/* See RFC 2012 */
++	TCP_ADD_STATS_USER(net, TCP_MIB_RTOALGORITHM, 1);
++	TCP_ADD_STATS_USER(net, TCP_MIB_RTOMIN, TCP_RTO_MIN*1000/HZ);
++	TCP_ADD_STATS_USER(net, TCP_MIB_RTOMAX, TCP_RTO_MAX*1000/HZ);
++	TCP_ADD_STATS_USER(net, TCP_MIB_MAXCONN, -1);
++}
++
++/* from STCP */
++static inline void tcp_clear_retrans_hints_partial(struct tcp_sock *tp)
++{
++	tp->lost_skb_hint = NULL;
++}
++
++static inline void tcp_clear_all_retrans_hints(struct tcp_sock *tp)
++{
++	tcp_clear_retrans_hints_partial(tp);
++	tp->retransmit_skb_hint = NULL;
++}
++
++/* MD5 Signature */
++struct crypto_hash;
++
++union tcp_md5_addr {
++	struct in_addr  a4;
++#if IS_ENABLED(CONFIG_IPV6)
++	struct in6_addr	a6;
++#endif
++};
++
++/* - key database */
++struct tcp_md5sig_key {
++	struct hlist_node	node;
++	u8			keylen;
++	u8			family; /* AF_INET or AF_INET6 */
++	union tcp_md5_addr	addr;
++	u8			key[TCP_MD5SIG_MAXKEYLEN];
++	struct rcu_head		rcu;
++};
++
++/* - sock block */
++struct tcp_md5sig_info {
++	struct hlist_head	head;
++	struct rcu_head		rcu;
++};
++
++/* - pseudo header */
++struct tcp4_pseudohdr {
++	__be32		saddr;
++	__be32		daddr;
++	__u8		pad;
++	__u8		protocol;
++	__be16		len;
++};
++
++struct tcp6_pseudohdr {
++	struct in6_addr	saddr;
++	struct in6_addr daddr;
++	__be32		len;
++	__be32		protocol;	/* including padding */
++};
++
++union tcp_md5sum_block {
++	struct tcp4_pseudohdr ip4;
++#if IS_ENABLED(CONFIG_IPV6)
++	struct tcp6_pseudohdr ip6;
++#endif
++};
++
++/* - pool: digest algorithm, hash description and scratch buffer */
++struct tcp_md5sig_pool {
++	struct hash_desc	md5_desc;
++	union tcp_md5sum_block	md5_blk;
++};
++
++/* - functions */
++int tcp_v4_md5_hash_skb(char *md5_hash, struct tcp_md5sig_key *key,
++			const struct sock *sk, const struct request_sock *req,
++			const struct sk_buff *skb);
++int tcp_md5_do_add(struct sock *sk, const union tcp_md5_addr *addr,
++		   int family, const u8 *newkey, u8 newkeylen, gfp_t gfp);
++int tcp_md5_do_del(struct sock *sk, const union tcp_md5_addr *addr,
++		   int family);
++struct tcp_md5sig_key *tcp_v4_md5_lookup(struct sock *sk,
++					 struct sock *addr_sk);
++
++#ifdef CONFIG_TCP_MD5SIG
++struct tcp_md5sig_key *tcp_md5_do_lookup(struct sock *sk,
++					 const union tcp_md5_addr *addr,
++					 int family);
++#define tcp_twsk_md5_key(twsk)	((twsk)->tw_md5_key)
++#else
++static inline struct tcp_md5sig_key *tcp_md5_do_lookup(struct sock *sk,
++					 const union tcp_md5_addr *addr,
++					 int family)
++{
++	return NULL;
++}
++#define tcp_twsk_md5_key(twsk)	NULL
++#endif
++
++bool tcp_alloc_md5sig_pool(void);
++
++struct tcp_md5sig_pool *tcp_get_md5sig_pool(void);
++static inline void tcp_put_md5sig_pool(void)
++{
++	local_bh_enable();
++}
++
++int tcp_md5_hash_header(struct tcp_md5sig_pool *, const struct tcphdr *);
++int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *, const struct sk_buff *,
++			  unsigned int header_len);
++int tcp_md5_hash_key(struct tcp_md5sig_pool *hp,
++		     const struct tcp_md5sig_key *key);
++
++/* From tcp_fastopen.c */
++void tcp_fastopen_cache_get(struct sock *sk, u16 *mss,
++			    struct tcp_fastopen_cookie *cookie, int *syn_loss,
++			    unsigned long *last_syn_loss);
++void tcp_fastopen_cache_set(struct sock *sk, u16 mss,
++			    struct tcp_fastopen_cookie *cookie, bool syn_lost);
++struct tcp_fastopen_request {
++	/* Fast Open cookie. Size 0 means a cookie request */
++	struct tcp_fastopen_cookie	cookie;
++	struct msghdr			*data;  /* data in MSG_FASTOPEN */
++	size_t				size;
++	int				copied;	/* queued in tcp_connect() */
++};
++void tcp_free_fastopen_req(struct tcp_sock *tp);
++
++extern struct tcp_fastopen_context __rcu *tcp_fastopen_ctx;
++int tcp_fastopen_reset_cipher(void *key, unsigned int len);
++void tcp_fastopen_cookie_gen(__be32 src, __be32 dst,
++			     struct tcp_fastopen_cookie *foc);
++void tcp_fastopen_init_key_once(bool publish);
++#define TCP_FASTOPEN_KEY_LENGTH 16
++
++/* Fastopen key context */
++struct tcp_fastopen_context {
++	struct crypto_cipher	*tfm;
++	__u8			key[TCP_FASTOPEN_KEY_LENGTH];
++	struct rcu_head		rcu;
++};
++
++/* write queue abstraction */
++static inline void tcp_write_queue_purge(struct sock *sk)
++{
++	struct sk_buff *skb;
++
++	while ((skb = __skb_dequeue(&sk->sk_write_queue)) != NULL)
++		sk_wmem_free_skb(sk, skb);
++	sk_mem_reclaim(sk);
++	tcp_clear_all_retrans_hints(tcp_sk(sk));
++}
++
++static inline struct sk_buff *tcp_write_queue_head(const struct sock *sk)
++{
++	return skb_peek(&sk->sk_write_queue);
++}
++
++static inline struct sk_buff *tcp_write_queue_tail(const struct sock *sk)
++{
++	return skb_peek_tail(&sk->sk_write_queue);
++}
++
++static inline struct sk_buff *tcp_write_queue_next(const struct sock *sk,
++						   const struct sk_buff *skb)
++{
++	return skb_queue_next(&sk->sk_write_queue, skb);
++}
++
++static inline struct sk_buff *tcp_write_queue_prev(const struct sock *sk,
++						   const struct sk_buff *skb)
++{
++	return skb_queue_prev(&sk->sk_write_queue, skb);
++}
++
++#define tcp_for_write_queue(skb, sk)					\
++	skb_queue_walk(&(sk)->sk_write_queue, skb)
++
++#define tcp_for_write_queue_from(skb, sk)				\
++	skb_queue_walk_from(&(sk)->sk_write_queue, skb)
++
++#define tcp_for_write_queue_from_safe(skb, tmp, sk)			\
++	skb_queue_walk_from_safe(&(sk)->sk_write_queue, skb, tmp)
++
++static inline struct sk_buff *tcp_send_head(const struct sock *sk)
++{
++	return sk->sk_send_head;
++}
++
++static inline bool tcp_skb_is_last(const struct sock *sk,
++				   const struct sk_buff *skb)
++{
++	return skb_queue_is_last(&sk->sk_write_queue, skb);
++}
++
++static inline void tcp_advance_send_head(struct sock *sk, const struct sk_buff *skb)
++{
++	if (tcp_skb_is_last(sk, skb))
++		sk->sk_send_head = NULL;
++	else
++		sk->sk_send_head = tcp_write_queue_next(sk, skb);
++}
++
++static inline void tcp_check_send_head(struct sock *sk, struct sk_buff *skb_unlinked)
++{
++	if (sk->sk_send_head == skb_unlinked)
++		sk->sk_send_head = NULL;
++}
++
++static inline void tcp_init_send_head(struct sock *sk)
++{
++	sk->sk_send_head = NULL;
++}
++
++static inline void __tcp_add_write_queue_tail(struct sock *sk, struct sk_buff *skb)
++{
++	__skb_queue_tail(&sk->sk_write_queue, skb);
++}
++
++static inline void tcp_add_write_queue_tail(struct sock *sk, struct sk_buff *skb)
++{
++	__tcp_add_write_queue_tail(sk, skb);
++
++	/* Queue it, remembering where we must start sending. */
++	if (sk->sk_send_head == NULL) {
++		sk->sk_send_head = skb;
++
++		if (tcp_sk(sk)->highest_sack == NULL)
++			tcp_sk(sk)->highest_sack = skb;
++	}
++}
++
++static inline void __tcp_add_write_queue_head(struct sock *sk, struct sk_buff *skb)
++{
++	__skb_queue_head(&sk->sk_write_queue, skb);
++}
++
++/* Insert buff after skb on the write queue of sk.  */
++static inline void tcp_insert_write_queue_after(struct sk_buff *skb,
++						struct sk_buff *buff,
++						struct sock *sk)
++{
++	__skb_queue_after(&sk->sk_write_queue, skb, buff);
++}
++
++/* Insert new before skb on the write queue of sk.  */
++static inline void tcp_insert_write_queue_before(struct sk_buff *new,
++						  struct sk_buff *skb,
++						  struct sock *sk)
++{
++	__skb_queue_before(&sk->sk_write_queue, skb, new);
++
++	if (sk->sk_send_head == skb)
++		sk->sk_send_head = new;
++}
++
++static inline void tcp_unlink_write_queue(struct sk_buff *skb, struct sock *sk)
++{
++	__skb_unlink(skb, &sk->sk_write_queue);
++}
++
++static inline bool tcp_write_queue_empty(struct sock *sk)
++{
++	return skb_queue_empty(&sk->sk_write_queue);
++}
++
++static inline void tcp_push_pending_frames(struct sock *sk)
++{
++	if (tcp_send_head(sk)) {
++		struct tcp_sock *tp = tcp_sk(sk);
++
++		__tcp_push_pending_frames(sk, tcp_current_mss(sk), tp->nonagle);
++	}
++}
++
++/* Start sequence of the skb just after the highest skb with SACKed
++ * bit, valid only if sacked_out > 0 or when the caller has ensured
++ * validity by itself.
++ */
++static inline u32 tcp_highest_sack_seq(struct tcp_sock *tp)
++{
++	if (!tp->sacked_out)
++		return tp->snd_una;
++
++	if (tp->highest_sack == NULL)
++		return tp->snd_nxt;
++
++	return TCP_SKB_CB(tp->highest_sack)->seq;
++}
++
++static inline void tcp_advance_highest_sack(struct sock *sk, struct sk_buff *skb)
++{
++	tcp_sk(sk)->highest_sack = tcp_skb_is_last(sk, skb) ? NULL :
++						tcp_write_queue_next(sk, skb);
++}
++
++static inline struct sk_buff *tcp_highest_sack(struct sock *sk)
++{
++	return tcp_sk(sk)->highest_sack;
++}
++
++static inline void tcp_highest_sack_reset(struct sock *sk)
++{
++	tcp_sk(sk)->highest_sack = tcp_write_queue_head(sk);
++}
++
++/* Called when old skb is about to be deleted (to be combined with new skb) */
++static inline void tcp_highest_sack_combine(struct sock *sk,
++					    struct sk_buff *old,
++					    struct sk_buff *new)
++{
++	if (tcp_sk(sk)->sacked_out && (old == tcp_sk(sk)->highest_sack))
++		tcp_sk(sk)->highest_sack = new;
++}
++
++/* Determines whether this is a thin stream (which may suffer from
++ * increased latency). Used to trigger latency-reducing mechanisms.
++ */
++static inline bool tcp_stream_is_thin(struct tcp_sock *tp)
++{
++	return tp->packets_out < 4 && !tcp_in_initial_slowstart(tp);
++}
++
++/* /proc */
++enum tcp_seq_states {
++	TCP_SEQ_STATE_LISTENING,
++	TCP_SEQ_STATE_OPENREQ,
++	TCP_SEQ_STATE_ESTABLISHED,
++};
++
++int tcp_seq_open(struct inode *inode, struct file *file);
++
++struct tcp_seq_afinfo {
++	char				*name;
++	sa_family_t			family;
++	const struct file_operations	*seq_fops;
++	struct seq_operations		seq_ops;
++};
++
++struct tcp_iter_state {
++	struct seq_net_private	p;
++	sa_family_t		family;
++	enum tcp_seq_states	state;
++	struct sock		*syn_wait_sk;
++	int			bucket, offset, sbucket, num;
++	kuid_t			uid;
++	loff_t			last_pos;
++};
++
++int tcp_proc_register(struct net *net, struct tcp_seq_afinfo *afinfo);
++void tcp_proc_unregister(struct net *net, struct tcp_seq_afinfo *afinfo);
++
++extern struct request_sock_ops tcp_request_sock_ops;
++extern struct request_sock_ops tcp6_request_sock_ops;
++
++void tcp_v4_destroy_sock(struct sock *sk);
++
++struct sk_buff *tcp_gso_segment(struct sk_buff *skb,
++				netdev_features_t features);
++struct sk_buff **tcp_gro_receive(struct sk_buff **head, struct sk_buff *skb);
++int tcp_gro_complete(struct sk_buff *skb);
++
++void __tcp_v4_send_check(struct sk_buff *skb, __be32 saddr, __be32 daddr);
++
++static inline u32 tcp_notsent_lowat(const struct tcp_sock *tp)
++{
++	return tp->notsent_lowat ?: sysctl_tcp_notsent_lowat;
++}
++
++static inline bool tcp_stream_memory_free(const struct sock *sk)
++{
++	const struct tcp_sock *tp = tcp_sk(sk);
++	u32 notsent_bytes = tp->write_seq - tp->snd_nxt;
++
++	return notsent_bytes < tcp_notsent_lowat(tp);
++}
++
++#ifdef CONFIG_PROC_FS
++int tcp4_proc_init(void);
++void tcp4_proc_exit(void);
++#endif
++
++/* TCP af-specific functions */
++struct tcp_sock_af_ops {
++#ifdef CONFIG_TCP_MD5SIG
++	struct tcp_md5sig_key	*(*md5_lookup) (struct sock *sk,
++						struct sock *addr_sk);
++	int			(*calc_md5_hash) (char *location,
++						  struct tcp_md5sig_key *md5,
++						  const struct sock *sk,
++						  const struct request_sock *req,
++						  const struct sk_buff *skb);
++	int			(*md5_parse) (struct sock *sk,
++					      char __user *optval,
++					      int optlen);
++#endif
++};
++
++struct tcp_request_sock_ops {
++#ifdef CONFIG_TCP_MD5SIG
++	struct tcp_md5sig_key	*(*md5_lookup) (struct sock *sk,
++						struct request_sock *req);
++	int			(*calc_md5_hash) (char *location,
++						  struct tcp_md5sig_key *md5,
++						  const struct sock *sk,
++						  const struct request_sock *req,
++						  const struct sk_buff *skb);
++#endif
++};
++
++int tcpv4_offload_init(void);
++
++void tcp_v4_init(void);
++void tcp_init(void);
++
++#endif	/* _TCP_H */
+diff -Nur linux-3.15-rc7.orig/net/core/request_sock.c linux-3.15-rc7/net/core/request_sock.c
+--- linux-3.15-rc7.orig/net/core/request_sock.c	2014-05-26 01:06:00.000000000 +0200
++++ linux-3.15-rc7/net/core/request_sock.c	2014-05-31 22:42:49.028605326 +0200
+@@ -131,6 +131,7 @@
  		kfree(lopt);
  }
  
--#ifdef CONFIG_TCP_FASTOPEN
++#ifdef CONFIG_TCP_FASTOPEN
  /*
   * This function is called to set a Fast Open socket's "fastopen_rsk" field
   * to NULL when a TFO socket no longer needs to access the request_sock.
-@@ -223,4 +222,3 @@
+@@ -222,3 +223,4 @@
  	spin_unlock_bh(&fastopenq->lock);
  	sock_put(lsk);
  }
--#endif
-diff -Nur linux-3.15-rc7/net/ipv4/Kconfig linux-3.15-rc7.orig/net/ipv4/Kconfig
---- linux-3.15-rc7/net/ipv4/Kconfig	2014-05-30 10:01:47.000000000 +0200
-+++ linux-3.15-rc7.orig/net/ipv4/Kconfig	2014-05-26 01:06:00.000000000 +0200
-@@ -307,10 +307,6 @@
++#endif
+diff -Nur linux-3.15-rc7.orig/net/core/request_sock.c.orig linux-3.15-rc7/net/core/request_sock.c.orig
+--- linux-3.15-rc7.orig/net/core/request_sock.c.orig	1970-01-01 01:00:00.000000000 +0100
++++ linux-3.15-rc7/net/core/request_sock.c.orig	2014-05-26 01:06:00.000000000 +0200
+@@ -0,0 +1,224 @@
++/*
++ * NET		Generic infrastructure for Network protocols.
++ *
++ * Authors:	Arnaldo Carvalho de Melo <acme@conectiva.com.br>
++ *
++ * 		From code originally in include/net/tcp.h
++ *
++ *		This program is free software; you can redistribute it and/or
++ *		modify it under the terms of the GNU General Public License
++ *		as published by the Free Software Foundation; either version
++ *		2 of the License, or (at your option) any later version.
++ */
++
++#include <linux/module.h>
++#include <linux/random.h>
++#include <linux/slab.h>
++#include <linux/string.h>
++#include <linux/tcp.h>
++#include <linux/vmalloc.h>
++
++#include <net/request_sock.h>
++
++/*
++ * Maximum number of SYN_RECV sockets in queue per LISTEN socket.
++ * One SYN_RECV socket costs about 80bytes on a 32bit machine.
++ * It would be better to replace it with a global counter for all sockets
++ * but then some measure against one socket starving all other sockets
++ * would be needed.
++ *
++ * The minimum value of it is 128. Experiments with real servers show that
++ * it is absolutely not enough even at 100conn/sec. 256 cures most
++ * of problems.
++ * This value is adjusted to 128 for low memory machines,
++ * and it will increase in proportion to the memory of machine.
++ * Note : Dont forget somaxconn that may limit backlog too.
++ */
++int sysctl_max_syn_backlog = 256;
++EXPORT_SYMBOL(sysctl_max_syn_backlog);
++
++int reqsk_queue_alloc(struct request_sock_queue *queue,
++		      unsigned int nr_table_entries)
++{
++	size_t lopt_size = sizeof(struct listen_sock);
++	struct listen_sock *lopt;
++
++	nr_table_entries = min_t(u32, nr_table_entries, sysctl_max_syn_backlog);
++	nr_table_entries = max_t(u32, nr_table_entries, 8);
++	nr_table_entries = roundup_pow_of_two(nr_table_entries + 1);
++	lopt_size += nr_table_entries * sizeof(struct request_sock *);
++	if (lopt_size > PAGE_SIZE)
++		lopt = vzalloc(lopt_size);
++	else
++		lopt = kzalloc(lopt_size, GFP_KERNEL);
++	if (lopt == NULL)
++		return -ENOMEM;
++
++	for (lopt->max_qlen_log = 3;
++	     (1 << lopt->max_qlen_log) < nr_table_entries;
++	     lopt->max_qlen_log++);
++
++	get_random_bytes(&lopt->hash_rnd, sizeof(lopt->hash_rnd));
++	rwlock_init(&queue->syn_wait_lock);
++	queue->rskq_accept_head = NULL;
++	lopt->nr_table_entries = nr_table_entries;
++
++	write_lock_bh(&queue->syn_wait_lock);
++	queue->listen_opt = lopt;
++	write_unlock_bh(&queue->syn_wait_lock);
++
++	return 0;
++}
++
++void __reqsk_queue_destroy(struct request_sock_queue *queue)
++{
++	struct listen_sock *lopt;
++	size_t lopt_size;
++
++	/*
++	 * this is an error recovery path only
++	 * no locking needed and the lopt is not NULL
++	 */
++
++	lopt = queue->listen_opt;
++	lopt_size = sizeof(struct listen_sock) +
++		lopt->nr_table_entries * sizeof(struct request_sock *);
++
++	if (lopt_size > PAGE_SIZE)
++		vfree(lopt);
++	else
++		kfree(lopt);
++}
++
++static inline struct listen_sock *reqsk_queue_yank_listen_sk(
++		struct request_sock_queue *queue)
++{
++	struct listen_sock *lopt;
++
++	write_lock_bh(&queue->syn_wait_lock);
++	lopt = queue->listen_opt;
++	queue->listen_opt = NULL;
++	write_unlock_bh(&queue->syn_wait_lock);
++
++	return lopt;
++}
++
++void reqsk_queue_destroy(struct request_sock_queue *queue)
++{
++	/* make all the listen_opt local to us */
++	struct listen_sock *lopt = reqsk_queue_yank_listen_sk(queue);
++	size_t lopt_size = sizeof(struct listen_sock) +
++		lopt->nr_table_entries * sizeof(struct request_sock *);
++
++	if (lopt->qlen != 0) {
++		unsigned int i;
++
++		for (i = 0; i < lopt->nr_table_entries; i++) {
++			struct request_sock *req;
++
++			while ((req = lopt->syn_table[i]) != NULL) {
++				lopt->syn_table[i] = req->dl_next;
++				lopt->qlen--;
++				reqsk_free(req);
++			}
++		}
++	}
++
++	WARN_ON(lopt->qlen != 0);
++	if (lopt_size > PAGE_SIZE)
++		vfree(lopt);
++	else
++		kfree(lopt);
++}
++
++/*
++ * This function is called to set a Fast Open socket's "fastopen_rsk" field
++ * to NULL when a TFO socket no longer needs to access the request_sock.
++ * This happens only after 3WHS has been either completed or aborted (e.g.,
++ * RST is received).
++ *
++ * Before TFO, a child socket is created only after 3WHS is completed,
++ * hence it never needs to access the request_sock. things get a lot more
++ * complex with TFO. A child socket, accepted or not, has to access its
++ * request_sock for 3WHS processing, e.g., to retransmit SYN-ACK pkts,
++ * until 3WHS is either completed or aborted. Afterwards the req will stay
++ * until either the child socket is accepted, or in the rare case when the
++ * listener is closed before the child is accepted.
++ *
++ * In short, a request socket is only freed after BOTH 3WHS has completed
++ * (or aborted) and the child socket has been accepted (or listener closed).
++ * When a child socket is accepted, its corresponding req->sk is set to
++ * NULL since it's no longer needed. More importantly, "req->sk == NULL"
++ * will be used by the code below to determine if a child socket has been
++ * accepted or not, and the check is protected by the fastopenq->lock
++ * described below.
++ *
++ * Note that fastopen_rsk is only accessed from the child socket's context
++ * with its socket lock held. But a request_sock (req) can be accessed by
++ * both its child socket through fastopen_rsk, and a listener socket through
++ * icsk_accept_queue.rskq_accept_head. To protect the access a simple spin
++ * lock per listener "icsk->icsk_accept_queue.fastopenq->lock" is created.
++ * only in the rare case when both the listener and the child locks are held,
++ * e.g., in inet_csk_listen_stop() do we not need to acquire the lock.
++ * The lock also protects other fields such as fastopenq->qlen, which is
++ * decremented by this function when fastopen_rsk is no longer needed.
++ *
++ * Note that another solution was to simply use the existing socket lock
++ * from the listener. But first socket lock is difficult to use. It is not
++ * a simple spin lock - one must consider sock_owned_by_user() and arrange
++ * to use sk_add_backlog() stuff. But what really makes it infeasible is the
++ * locking hierarchy violation. E.g., inet_csk_listen_stop() may try to
++ * acquire a child's lock while holding listener's socket lock. A corner
++ * case might also exist in tcp_v4_hnd_req() that will trigger this locking
++ * order.
++ *
++ * When a TFO req is created, it needs to sock_hold its listener to prevent
++ * the latter data structure from going away.
++ *
++ * This function also sets "treq->listener" to NULL and unreference listener
++ * socket. treq->listener is used by the listener so it is protected by the
++ * fastopenq->lock in this function.
++ */
++void reqsk_fastopen_remove(struct sock *sk, struct request_sock *req,
++			   bool reset)
++{
++	struct sock *lsk = tcp_rsk(req)->listener;
++	struct fastopen_queue *fastopenq =
++	    inet_csk(lsk)->icsk_accept_queue.fastopenq;
++
++	tcp_sk(sk)->fastopen_rsk = NULL;
++	spin_lock_bh(&fastopenq->lock);
++	fastopenq->qlen--;
++	tcp_rsk(req)->listener = NULL;
++	if (req->sk)	/* the child socket hasn't been accepted yet */
++		goto out;
++
++	if (!reset || lsk->sk_state != TCP_LISTEN) {
++		/* If the listener has been closed don't bother with the
++		 * special RST handling below.
++		 */
++		spin_unlock_bh(&fastopenq->lock);
++		sock_put(lsk);
++		reqsk_free(req);
++		return;
++	}
++	/* Wait for 60secs before removing a req that has triggered RST.
++	 * This is a simple defense against TFO spoofing attack - by
++	 * counting the req against fastopen.max_qlen, and disabling
++	 * TFO when the qlen exceeds max_qlen.
++	 *
++	 * For more details see CoNext'11 "TCP Fast Open" paper.
++	 */
++	req->expires = jiffies + 60*HZ;
++	if (fastopenq->rskq_rst_head == NULL)
++		fastopenq->rskq_rst_head = req;
++	else
++		fastopenq->rskq_rst_tail->dl_next = req;
++
++	req->dl_next = NULL;
++	fastopenq->rskq_rst_tail = req;
++	fastopenq->qlen++;
++out:
++	spin_unlock_bh(&fastopenq->lock);
++	sock_put(lsk);
++}
+diff -Nur linux-3.15-rc7.orig/net/ipv4/Kconfig linux-3.15-rc7/net/ipv4/Kconfig
+--- linux-3.15-rc7.orig/net/ipv4/Kconfig	2014-05-26 01:06:00.000000000 +0200
++++ linux-3.15-rc7/net/ipv4/Kconfig	2014-05-31 22:42:49.028605326 +0200
+@@ -307,6 +307,10 @@
  	  the notion of a secure tunnel for IPSEC and then use routing protocol
  	  on top.
  
--config TCP_FASTOPEN
--	bool "Enable TCP fastopen"
--	default n
--
++config TCP_FASTOPEN
++	bool "Enable TCP fastopen"
++	default n
++
  config INET_AH
  	tristate "IP: AH transformation"
  	select XFRM_ALGO
-diff -Nur linux-3.15-rc7/net/ipv4/Makefile linux-3.15-rc7.orig/net/ipv4/Makefile
---- linux-3.15-rc7/net/ipv4/Makefile	2014-05-30 10:01:47.000000000 +0200
-+++ linux-3.15-rc7.orig/net/ipv4/Makefile	2014-05-26 01:06:00.000000000 +0200
+diff -Nur linux-3.15-rc7.orig/net/ipv4/Makefile linux-3.15-rc7/net/ipv4/Makefile
+--- linux-3.15-rc7.orig/net/ipv4/Makefile	2014-05-26 01:06:00.000000000 +0200
++++ linux-3.15-rc7/net/ipv4/Makefile	2014-05-31 22:42:49.028605326 +0200
 @@ -7,7 +7,7 @@
  	     ip_output.o ip_sockglue.o inet_hashtables.o \
  	     inet_timewait_sock.o inet_connection_sock.o \
  	     tcp.o tcp_input.o tcp_output.o tcp_timer.o tcp_ipv4.o \
--	     tcp_minisocks.o tcp_cong.o tcp_metrics.o \
-+	     tcp_minisocks.o tcp_cong.o tcp_metrics.o tcp_fastopen.o \
+-	     tcp_minisocks.o tcp_cong.o tcp_metrics.o tcp_fastopen.o \
++	     tcp_minisocks.o tcp_cong.o tcp_metrics.o \
  	     tcp_offload.o datagram.o raw.o udp.o udplite.o \
  	     udp_offload.o arp.o icmp.o devinet.o af_inet.o igmp.o \
  	     fib_frontend.o fib_semantics.o fib_trie.o \
-@@ -51,7 +51,6 @@
+@@ -51,6 +51,7 @@
  obj-$(CONFIG_TCP_CONG_LP) += tcp_lp.o
  obj-$(CONFIG_TCP_CONG_YEAH) += tcp_yeah.o
  obj-$(CONFIG_TCP_CONG_ILLINOIS) += tcp_illinois.o
--obj-$(CONFIG_TCP_FASTOPEN) += tcp_fastopen.o
++obj-$(CONFIG_TCP_FASTOPEN) += tcp_fastopen.o
  obj-$(CONFIG_MEMCG_KMEM) += tcp_memcontrol.o
  obj-$(CONFIG_NETLABEL) += cipso_ipv4.o
  
-diff -Nur linux-3.15-rc7/net/ipv4/sysctl_net_ipv4.c linux-3.15-rc7.orig/net/ipv4/sysctl_net_ipv4.c
---- linux-3.15-rc7/net/ipv4/sysctl_net_ipv4.c	2014-05-30 10:01:48.000000000 +0200
-+++ linux-3.15-rc7.orig/net/ipv4/sysctl_net_ipv4.c	2014-05-26 01:06:00.000000000 +0200
-@@ -200,7 +200,6 @@
+diff -Nur linux-3.15-rc7.orig/net/ipv4/sysctl_net_ipv4.c linux-3.15-rc7/net/ipv4/sysctl_net_ipv4.c
+--- linux-3.15-rc7.orig/net/ipv4/sysctl_net_ipv4.c	2014-05-26 01:06:00.000000000 +0200
++++ linux-3.15-rc7/net/ipv4/sysctl_net_ipv4.c	2014-05-31 22:42:49.028605326 +0200
+@@ -200,6 +200,7 @@
  	return ret;
  }
  
--#ifdef CONFIG_TCP_FASTOPEN
++#ifdef CONFIG_TCP_FASTOPEN
  static int proc_tcp_fastopen_key(struct ctl_table *ctl, int write,
  				 void __user *buffer, size_t *lenp,
  				 loff_t *ppos)
-@@ -247,7 +246,6 @@
+@@ -246,6 +247,7 @@
  	kfree(tbl.data);
  	return ret;
  }
--#endif
++#endif
  
  static struct ctl_table ipv4_table[] = {
  	{
-@@ -390,7 +388,6 @@
+@@ -388,6 +390,7 @@
  		.proc_handler	= proc_dointvec
  	},
  #endif
--#ifdef CONFIG_TCP_FASTOPEN
++#ifdef CONFIG_TCP_FASTOPEN
  	{
  		.procname	= "tcp_fastopen",
  		.data		= &sysctl_tcp_fastopen,
-@@ -404,7 +401,6 @@
+@@ -401,6 +404,7 @@
  		.maxlen		= ((TCP_FASTOPEN_KEY_LENGTH * 2) + 10),
  		.proc_handler	= proc_tcp_fastopen_key,
  	},
--#endif
++#endif
  	{
  		.procname	= "tcp_tw_recycle",
  		.data		= &tcp_death_row.sysctl_tw_recycle,
-diff -Nur linux-3.15-rc7/net/ipv4/tcp.c linux-3.15-rc7.orig/net/ipv4/tcp.c
---- linux-3.15-rc7/net/ipv4/tcp.c	2014-05-30 10:01:48.000000000 +0200
-+++ linux-3.15-rc7.orig/net/ipv4/tcp.c	2014-05-26 01:06:00.000000000 +0200
-@@ -1036,7 +1036,6 @@
+diff -Nur linux-3.15-rc7.orig/net/ipv4/tcp.c linux-3.15-rc7/net/ipv4/tcp.c
+--- linux-3.15-rc7.orig/net/ipv4/tcp.c	2014-05-26 01:06:00.000000000 +0200
++++ linux-3.15-rc7/net/ipv4/tcp.c	2014-05-31 22:42:49.028605326 +0200
+@@ -1036,6 +1036,7 @@
  	return tmp;
  }
  
--#ifdef CONFIG_TCP_FASTOPEN
++#ifdef CONFIG_TCP_FASTOPEN
  void tcp_free_fastopen_req(struct tcp_sock *tp)
  {
  	if (tp->fastopen_req != NULL) {
-@@ -1070,7 +1069,6 @@
+@@ -1069,6 +1070,7 @@
  	tcp_free_fastopen_req(tp);
  	return err;
  }
--#endif
++#endif
  
  int tcp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
  		size_t size)
-@@ -1086,7 +1084,6 @@
+@@ -1084,6 +1086,7 @@
  	lock_sock(sk);
  
  	flags = msg->msg_flags;
--#ifdef CONFIG_TCP_FASTOPEN
++#ifdef CONFIG_TCP_FASTOPEN
  	if (flags & MSG_FASTOPEN) {
  		err = tcp_sendmsg_fastopen(sk, msg, &copied_syn, size);
  		if (err == -EINPROGRESS && copied_syn > 0)
-@@ -1095,7 +1092,6 @@
+@@ -1092,6 +1095,7 @@
  			goto out_err;
  		offset = copied_syn;
  	}
--#endif
++#endif
  
  	timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT);
  
-diff -Nur linux-3.15-rc7/net/ipv4/tcp_ipv4.c linux-3.15-rc7.orig/net/ipv4/tcp_ipv4.c
---- linux-3.15-rc7/net/ipv4/tcp_ipv4.c	2014-05-30 10:01:48.000000000 +0200
-+++ linux-3.15-rc7.orig/net/ipv4/tcp_ipv4.c	2014-05-26 01:06:00.000000000 +0200
-@@ -1260,7 +1260,6 @@
+diff -Nur linux-3.15-rc7.orig/net/ipv4/tcp_ipv4.c linux-3.15-rc7/net/ipv4/tcp_ipv4.c
+--- linux-3.15-rc7.orig/net/ipv4/tcp_ipv4.c	2014-05-26 01:06:00.000000000 +0200
++++ linux-3.15-rc7/net/ipv4/tcp_ipv4.c	2014-05-31 22:42:49.032605359 +0200
+@@ -1260,6 +1260,7 @@
  };
  #endif
  
--#ifdef CONFIG_TCP_FASTOPEN
++#ifdef CONFIG_TCP_FASTOPEN
  static bool tcp_fastopen_check(struct sock *sk, struct sk_buff *skb,
  			       struct request_sock *req,
  			       struct tcp_fastopen_cookie *foc,
-@@ -1441,23 +1440,6 @@
+@@ -1440,6 +1441,23 @@
  	WARN_ON(req->sk == NULL);
  	return 0;
  }
--#else
--static bool tcp_fastopen_check(struct sock *sk, struct sk_buff *skb,
--			       struct request_sock *req,
--			       struct tcp_fastopen_cookie *foc,
--			       struct tcp_fastopen_cookie *valid_foc)
--{
--	return false;
--}
--
--static int tcp_v4_conn_req_fastopen(struct sock *sk,
--				    struct sk_buff *skb,
--				    struct sk_buff *skb_synack,
--				    struct request_sock *req)
--{
--	return 0;
--}
--#endif
++#else
++static bool tcp_fastopen_check(struct sock *sk, struct sk_buff *skb,
++			       struct request_sock *req,
++			       struct tcp_fastopen_cookie *foc,
++			       struct tcp_fastopen_cookie *valid_foc)
++{
++	return false;
++}
++
++static int tcp_v4_conn_req_fastopen(struct sock *sk,
++				    struct sk_buff *skb,
++				    struct sk_buff *skb_synack,
++				    struct request_sock *req)
++{
++	return 0;
++}
++#endif
  
  int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
  {
+diff -Nur linux-3.15-rc7.orig/net/Kconfig linux-3.15-rc7/net/Kconfig
+--- linux-3.15-rc7.orig/net/Kconfig	2014-05-26 01:06:00.000000000 +0200
++++ linux-3.15-rc7/net/Kconfig	2014-05-31 22:42:49.028605326 +0200
+@@ -53,8 +53,8 @@
+ 
+ config INET
+ 	bool "TCP/IP networking"
+-	select CRYPTO
+-	select CRYPTO_AES
++	select CRYPTO if TCP_FASTOPEN
++	select CRYPTO_AES if TCP_FASTOPEN
+ 	---help---
+ 	  These are the protocols used on the Internet and on most local
+ 	  Ethernets. It is highly recommended to say Y here (this will enlarge
diff --git a/target/linux/patches/3.15-rc7/zlib-inflate.patch b/target/linux/patches/3.15-rc7/zlib-inflate.patch
deleted file mode 100644
index 58e1f6d21..000000000
--- a/target/linux/patches/3.15-rc7/zlib-inflate.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-diff -Nur linux-2.6.37.orig/lib/Kconfig linux-2.6.37/lib/Kconfig
---- linux-2.6.37.orig/lib/Kconfig	2011-01-05 01:50:19.000000000 +0100
-+++ linux-2.6.37/lib/Kconfig	2011-03-01 20:10:29.833370667 +0100
-@@ -95,7 +95,7 @@
- # compression support is select'ed if needed
- #
- config ZLIB_INFLATE
--	tristate
-+	boolean
- 
- config ZLIB_DEFLATE
- 	tristate