Merge commit 'v2.6.32' into reiserfs/kill-bkl

Merge-reason: The tree was based 2.6.31. It's better to be up to date
with 2.6.32. Although no conflicting changes were made in between,
it gives benchmarking results closer to the lastest kernel behaviour.

16 files changed, 74 insertions, 92 deletions

diff --git a/net/dccp/ccids/Kconfig b/net/dccp/ccids/Kconfig
index 4b5db44970aa..8408398cd44e 100644
--- a/net/dccp/ccids/Kconfig
+++ b/net/dccp/ccids/Kconfig
@@ -66,9 +66,9 @@ config IP_DCCP_CCID3_RTO
 	    A value of 0 disables this feature by enforcing the value specified
 	    in RFC 3448. The following values have been suggested as bounds for
 	    experimental use:
-	    	* 16-20ms to match the typical multimedia inter-frame interval
-	    	* 100ms as a reasonable compromise [default]
-	    	* 1000ms corresponds to the lower TCP RTO bound (RFC 2988, 2.4)
+		* 16-20ms to match the typical multimedia inter-frame interval
+		* 100ms as a reasonable compromise [default]
+		* 1000ms corresponds to the lower TCP RTO bound (RFC 2988, 2.4)
 
 	    The default of 100ms is a compromise between a large value for
 	    efficient DCCP implementations, and a small value to avoid disrupting
diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index d235294ace23..e8cf99e880b0 100644
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -1,6 +1,4 @@
 /*
- *  net/dccp/ccids/ccid2.c
- *
  *  Copyright (c) 2005, 2006 Andrea Bittau <a.bittau@cs.ucl.ac.uk>
  *
  *  Changes to meet Linux coding standards, and DCCP infrastructure fixes.
diff --git a/net/dccp/ccids/ccid2.h b/net/dccp/ccids/ccid2.h
index 2c94ca029010..326ac90fb909 100644
--- a/net/dccp/ccids/ccid2.h
+++ b/net/dccp/ccids/ccid2.h
@@ -1,6 +1,4 @@
 /*
- *  net/dccp/ccids/ccid2.h
- *
  *  Copyright (c) 2005 Andrea Bittau <a.bittau@cs.ucl.ac.uk>
  *
  *  This program is free software; you can redistribute it and/or modify
@@ -40,14 +38,14 @@ struct ccid2_seq {
 #define CCID2_SEQBUF_LEN 1024
 #define CCID2_SEQBUF_MAX 128
 
-/** struct ccid2_hc_tx_sock - CCID2 TX half connection
- *
+/**
+ * struct ccid2_hc_tx_sock - CCID2 TX half connection
  * @ccid2hctx_{cwnd,ssthresh,pipe}: as per RFC 4341, section 5
  * @ccid2hctx_packets_acked - Ack counter for deriving cwnd growth (RFC 3465)
  * @ccid2hctx_lastrtt -time RTT was last measured
  * @ccid2hctx_rpseq - last consecutive seqno
  * @ccid2hctx_rpdupack - dupacks since rpseq
-*/
+ */
 struct ccid2_hc_tx_sock {
 	u32			ccid2hctx_cwnd;
 	u32			ccid2hctx_ssthresh;
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index a27b7f4c19c5..34dcc798c457 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -1,6 +1,4 @@
 /*
- *  net/dccp/ccids/ccid3.c
- *
  *  Copyright (c) 2007   The University of Aberdeen, Scotland, UK
  *  Copyright (c) 2005-7 The University of Waikato, Hamilton, New Zealand.
  *  Copyright (c) 2005-7 Ian McDonald <ian.mcdonald@jandi.co.nz>
@@ -52,7 +50,7 @@ static int ccid3_debug;
 #ifdef CONFIG_IP_DCCP_CCID3_DEBUG
 static const char *ccid3_tx_state_name(enum ccid3_hc_tx_states state)
 {
-	static char *ccid3_state_names[] = {
+	static const char *const ccid3_state_names[] = {
 	[TFRC_SSTATE_NO_SENT]  = "NO_SENT",
 	[TFRC_SSTATE_NO_FBACK] = "NO_FBACK",
 	[TFRC_SSTATE_FBACK]    = "FBACK",
@@ -646,7 +644,7 @@ enum ccid3_fback_type {
 #ifdef CONFIG_IP_DCCP_CCID3_DEBUG
 static const char *ccid3_rx_state_name(enum ccid3_hc_rx_states state)
 {
-	static char *ccid3_rx_state_names[] = {
+	static const char *const ccid3_rx_state_names[] = {
 	[TFRC_RSTATE_NO_DATA] = "NO_DATA",
 	[TFRC_RSTATE_DATA]    = "DATA",
 	[TFRC_RSTATE_TERM]    = "TERM",
@@ -750,7 +748,8 @@ static int ccid3_hc_rx_insert_options(struct sock *sk, struct sk_buff *skb)
 	return 0;
 }
 
-/** ccid3_first_li  -  Implements [RFC 3448, 6.3.1]
+/**
+ * ccid3_first_li  -  Implements [RFC 5348, 6.3.1]
  *
  * Determine the length of the first loss interval via inverse lookup.
  * Assume that X_recv can be computed by the throughput equation
diff --git a/net/dccp/ccids/ccid3.h b/net/dccp/ccids/ccid3.h
index 49ca32bd7e79..e5a244143846 100644
--- a/net/dccp/ccids/ccid3.h
+++ b/net/dccp/ccids/ccid3.h
@@ -1,6 +1,4 @@
 /*
- *  net/dccp/ccids/ccid3.h
- *
  *  Copyright (c) 2005-7 The University of Waikato, Hamilton, New Zealand.
  *  Copyright (c) 2007   The University of Aberdeen, Scotland, UK
  *
@@ -75,8 +73,8 @@ enum ccid3_hc_tx_states {
 	TFRC_SSTATE_TERM,
 };
 
-/** struct ccid3_hc_tx_sock - CCID3 sender half-connection socket
- *
+/**
+ * struct ccid3_hc_tx_sock - CCID3 sender half-connection socket
  * @ccid3hctx_x - Current sending rate in 64 * bytes per second
  * @ccid3hctx_x_recv - Receive rate    in 64 * bytes per second
  * @ccid3hctx_x_calc - Calculated rate in bytes per second
@@ -119,9 +117,9 @@ struct ccid3_hc_tx_sock {
 
 static inline struct ccid3_hc_tx_sock *ccid3_hc_tx_sk(const struct sock *sk)
 {
-    struct ccid3_hc_tx_sock *hctx = ccid_priv(dccp_sk(sk)->dccps_hc_tx_ccid);
-    BUG_ON(hctx == NULL);
-    return hctx;
+	struct ccid3_hc_tx_sock *hctx = ccid_priv(dccp_sk(sk)->dccps_hc_tx_ccid);
+	BUG_ON(hctx == NULL);
+	return hctx;
 }
 
 /* TFRC receiver states */
@@ -131,22 +129,22 @@ enum ccid3_hc_rx_states {
 	TFRC_RSTATE_TERM    = 127,
 };
 
-/** struct ccid3_hc_rx_sock - CCID3 receiver half-connection socket
- *
- *  @ccid3hcrx_x_recv  -  Receiver estimate of send rate (RFC 3448 4.3)
- *  @ccid3hcrx_rtt  -  Receiver estimate of rtt (non-standard)
- *  @ccid3hcrx_p  -  Current loss event rate (RFC 3448 5.4)
- *  @ccid3hcrx_last_counter  -  Tracks window counter (RFC 4342, 8.1)
- *  @ccid3hcrx_state  -  Receiver state, one of %ccid3_hc_rx_states
- *  @ccid3hcrx_bytes_recv  -  Total sum of DCCP payload bytes
- *  @ccid3hcrx_x_recv  -  Receiver estimate of send rate (RFC 3448, sec. 4.3)
- *  @ccid3hcrx_rtt  -  Receiver estimate of RTT
- *  @ccid3hcrx_tstamp_last_feedback  -  Time at which last feedback was sent
- *  @ccid3hcrx_tstamp_last_ack  -  Time at which last feedback was sent
- *  @ccid3hcrx_hist  -  Packet history (loss detection + RTT sampling)
- *  @ccid3hcrx_li_hist  -  Loss Interval database
- *  @ccid3hcrx_s  -  Received packet size in bytes
- *  @ccid3hcrx_pinv  -  Inverse of Loss Event Rate (RFC 4342, sec. 8.5)
+/**
+ * struct ccid3_hc_rx_sock - CCID3 receiver half-connection socket
+ * @ccid3hcrx_x_recv  -  Receiver estimate of send rate (RFC 3448 4.3)
+ * @ccid3hcrx_rtt  -  Receiver estimate of rtt (non-standard)
+ * @ccid3hcrx_p  -  Current loss event rate (RFC 3448 5.4)
+ * @ccid3hcrx_last_counter  -  Tracks window counter (RFC 4342, 8.1)
+ * @ccid3hcrx_state  -  Receiver state, one of %ccid3_hc_rx_states
+ * @ccid3hcrx_bytes_recv  -  Total sum of DCCP payload bytes
+ * @ccid3hcrx_x_recv  -  Receiver estimate of send rate (RFC 3448, sec. 4.3)
+ * @ccid3hcrx_rtt  -  Receiver estimate of RTT
+ * @ccid3hcrx_tstamp_last_feedback  -  Time at which last feedback was sent
+ * @ccid3hcrx_tstamp_last_ack  -  Time at which last feedback was sent
+ * @ccid3hcrx_hist  -  Packet history (loss detection + RTT sampling)
+ * @ccid3hcrx_li_hist  -  Loss Interval database
+ * @ccid3hcrx_s  -  Received packet size in bytes
+ * @ccid3hcrx_pinv  -  Inverse of Loss Event Rate (RFC 4342, sec. 8.5)
  */
 struct ccid3_hc_rx_sock {
 	u8				ccid3hcrx_last_counter:4;
@@ -163,9 +161,9 @@ struct ccid3_hc_rx_sock {
 
 static inline struct ccid3_hc_rx_sock *ccid3_hc_rx_sk(const struct sock *sk)
 {
-    struct ccid3_hc_rx_sock *hcrx = ccid_priv(dccp_sk(sk)->dccps_hc_rx_ccid);
-    BUG_ON(hcrx == NULL);
-    return hcrx;
+	struct ccid3_hc_rx_sock *hcrx = ccid_priv(dccp_sk(sk)->dccps_hc_rx_ccid);
+	BUG_ON(hcrx == NULL);
+	return hcrx;
 }
 
 #endif /* _DCCP_CCID3_H_ */
diff --git a/net/dccp/ccids/lib/loss_interval.c b/net/dccp/ccids/lib/loss_interval.c
index 4d1e40127264..8fc3cbf79071 100644
--- a/net/dccp/ccids/lib/loss_interval.c
+++ b/net/dccp/ccids/lib/loss_interval.c
@@ -1,6 +1,4 @@
 /*
- *  net/dccp/ccids/lib/loss_interval.c
- *
  *  Copyright (c) 2007   The University of Aberdeen, Scotland, UK
  *  Copyright (c) 2005-7 The University of Waikato, Hamilton, New Zealand.
  *  Copyright (c) 2005-7 Ian McDonald <ian.mcdonald@jandi.co.nz>
@@ -21,7 +19,7 @@ static const int tfrc_lh_weights[NINTERVAL] = { 10, 10, 10, 10, 8, 6, 4, 2 };
 /* implements LIFO semantics on the array */
 static inline u8 LIH_INDEX(const u8 ctr)
 {
-	return (LIH_SIZE - 1 - (ctr % LIH_SIZE));
+	return LIH_SIZE - 1 - (ctr % LIH_SIZE);
 }
 
 /* the `counter' index always points at the next entry to be populated */
@@ -129,7 +127,8 @@ static inline u8 tfrc_lh_is_new_loss(struct tfrc_loss_interval *cur,
 		(cur->li_is_closed || SUB16(new_loss->tfrchrx_ccval, cur->li_ccval) > 4);
 }
 
-/** tfrc_lh_interval_add  -  Insert new record into the Loss Interval database
+/**
+ * tfrc_lh_interval_add  -  Insert new record into the Loss Interval database
  * @lh:		   Loss Interval database
  * @rh:		   Receive history containing a fresh loss event
  * @calc_first_li: Caller-dependent routine to compute length of first interval
diff --git a/net/dccp/ccids/lib/loss_interval.h b/net/dccp/ccids/lib/loss_interval.h
index 246018a3b269..d1d2f5383b7d 100644
--- a/net/dccp/ccids/lib/loss_interval.h
+++ b/net/dccp/ccids/lib/loss_interval.h
@@ -1,8 +1,6 @@
 #ifndef _DCCP_LI_HIST_
 #define _DCCP_LI_HIST_
 /*
- *  net/dccp/ccids/lib/loss_interval.h
- *
  *  Copyright (c) 2007   The University of Aberdeen, Scotland, UK
  *  Copyright (c) 2005-7 The University of Waikato, Hamilton, New Zealand.
  *  Copyright (c) 2005-7 Ian McDonald <ian.mcdonald@jandi.co.nz>
diff --git a/net/dccp/ccids/lib/packet_history.c b/net/dccp/ccids/lib/packet_history.c
index b7785b3581ec..3a4f414e94a0 100644
--- a/net/dccp/ccids/lib/packet_history.c
+++ b/net/dccp/ccids/lib/packet_history.c
@@ -1,6 +1,4 @@
 /*
- *  net/dccp/packet_history.c
- *
  *  Copyright (c) 2007   The University of Aberdeen, Scotland, UK
  *  Copyright (c) 2005-7 The University of Waikato, Hamilton, New Zealand.
  *
@@ -128,7 +126,7 @@ u32 tfrc_tx_hist_rtt(struct tfrc_tx_hist_entry *head, const u64 seqno,
 
 
 /*
- * 	Receiver History Routines
+ *	Receiver History Routines
  */
 static struct kmem_cache *tfrc_rx_hist_slab;
 
diff --git a/net/dccp/ccids/lib/packet_history.h b/net/dccp/ccids/lib/packet_history.h
index 461cc91cce88..7df6c5299999 100644
--- a/net/dccp/ccids/lib/packet_history.h
+++ b/net/dccp/ccids/lib/packet_history.h
@@ -70,7 +70,6 @@ struct tfrc_rx_hist_entry {
 
 /**
  * tfrc_rx_hist  -  RX history structure for TFRC-based protocols
- *
  * @ring:		Packet history for RTT sampling and loss detection
  * @loss_count:		Number of entries in circular history
  * @loss_start:		Movable index (for loss detection)
diff --git a/net/dccp/ccids/lib/tfrc.h b/net/dccp/ccids/lib/tfrc.h
index e9720b143275..01bb48e96c2e 100644
--- a/net/dccp/ccids/lib/tfrc.h
+++ b/net/dccp/ccids/lib/tfrc.h
@@ -1,8 +1,6 @@
 #ifndef _TFRC_H_
 #define _TFRC_H_
 /*
- *  net/dccp/ccids/lib/tfrc.h
- *
  *  Copyright (c) 2007   The University of Aberdeen, Scotland, UK
  *  Copyright (c) 2005-6 The University of Waikato, Hamilton, New Zealand.
  *  Copyright (c) 2005-6 Ian McDonald <ian.mcdonald@jandi.co.nz>
@@ -32,7 +30,7 @@ extern int tfrc_debug;
 /* integer-arithmetic divisions of type (a * 1000000)/b */
 static inline u64 scaled_div(u64 a, u64 b)
 {
-	BUG_ON(b==0);
+	BUG_ON(b == 0);
 	return div64_u64(a * 1000000, b);
 }
 
diff --git a/net/dccp/ccids/lib/tfrc_equation.c b/net/dccp/ccids/lib/tfrc_equation.c
index c5d3a9e5a5a4..22ca1cf0eb55 100644
--- a/net/dccp/ccids/lib/tfrc_equation.c
+++ b/net/dccp/ccids/lib/tfrc_equation.c
@@ -1,6 +1,4 @@
 /*
- *  net/dccp/ccids/lib/tfrc_equation.c
- *
  *  Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
  *  Copyright (c) 2005 Ian McDonald <ian.mcdonald@jandi.co.nz>
  *  Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
@@ -79,10 +77,10 @@
     }
 
   With the given configuration, we have, with M = TFRC_CALC_X_ARRSIZE-1,
-    lookup[0][0]  =  g(1000000/(M+1)) 		 =  1000000 * f(0.2%)
-    lookup[M][0]  =  g(1000000)			 =  1000000 * f(100%)
-    lookup[0][1]  =  g(TFRC_SMALLEST_P)		  = 1000000 * f(0.01%)
-    lookup[M][1]  =  g(TFRC_CALC_X_SPLIT)	 =  1000000 * f(5%)
+    lookup[0][0]  =  g(1000000/(M+1))		= 1000000 * f(0.2%)
+    lookup[M][0]  =  g(1000000)			= 1000000 * f(100%)
+    lookup[0][1]  =  g(TFRC_SMALLEST_P)		= 1000000 * f(0.01%)
+    lookup[M][1]  =  g(TFRC_CALC_X_SPLIT)	= 1000000 * f(5%)
 
   In summary, the two columns represent f(p) for the following ranges:
     * The first column is for   0.002  <= p <= 1.0
@@ -610,11 +608,10 @@ static inline u32 tfrc_binsearch(u32 fval, u8 small)
 
 /**
  * tfrc_calc_x - Calculate the send rate as per section 3.1 of RFC3448
- *
- *  @s: packet size          in bytes
- *  @R: RTT                  scaled by 1000000   (i.e., microseconds)
- *  @p: loss ratio estimate  scaled by 1000000
- *  Returns X_calc           in bytes per second (not scaled).
+ * @s: packet size          in bytes
+ * @R: RTT                  scaled by 1000000   (i.e., microseconds)
+ * @p: loss ratio estimate  scaled by 1000000
+ * Returns X_calc           in bytes per second (not scaled).
  */
 u32 tfrc_calc_x(u16 s, u32 R, u32 p)
 {
@@ -630,17 +627,17 @@ u32 tfrc_calc_x(u16 s, u32 R, u32 p)
 		return ~0U;
 	}
 
-	if (p <= TFRC_CALC_X_SPLIT) 		{     /* 0.0000 < p <= 0.05   */
+	if (p <= TFRC_CALC_X_SPLIT)		{     /* 0.0000 < p <= 0.05   */
 		if (p < TFRC_SMALLEST_P) {	      /* 0.0000 < p <  0.0001 */
 			DCCP_WARN("Value of p (%d) below resolution. "
 				  "Substituting %d\n", p, TFRC_SMALLEST_P);
 			index = 0;
-		} else 				      /* 0.0001 <= p <= 0.05  */
+		} else				      /* 0.0001 <= p <= 0.05  */
 			index =  p/TFRC_SMALLEST_P - 1;
 
 		f = tfrc_calc_x_lookup[index][1];
 
-	} else {	 			      /* 0.05   <  p <= 1.00  */
+	} else {				      /* 0.05   <  p <= 1.00  */
 		index = p/(1000000/TFRC_CALC_X_ARRSIZE) - 1;
 
 		f = tfrc_calc_x_lookup[index][0];
@@ -661,7 +658,6 @@ u32 tfrc_calc_x(u16 s, u32 R, u32 p)
 
 /**
  *  tfrc_calc_x_reverse_lookup  -  try to find p given f(p)
- *
  *  @fvalue: function value to match, scaled by 1000000
  *  Returns closest match for p, also scaled by 1000000
  */
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index d6bc47363b1c..5ef32c2f0d6a 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -290,14 +290,14 @@ extern int	   dccp_disconnect(struct sock *sk, int flags);
 extern int	   dccp_getsockopt(struct sock *sk, int level, int optname,
 				   char __user *optval, int __user *optlen);
 extern int	   dccp_setsockopt(struct sock *sk, int level, int optname,
-				   char __user *optval, int optlen);
+				   char __user *optval, unsigned int optlen);
 #ifdef CONFIG_COMPAT
 extern int	   compat_dccp_getsockopt(struct sock *sk,
 				int level, int optname,
 				char __user *optval, int __user *optlen);
 extern int	   compat_dccp_setsockopt(struct sock *sk,
 				int level, int optname,
-				char __user *optval, int optlen);
+				char __user *optval, unsigned int optlen);
 #endif
 extern int	   dccp_ioctl(struct sock *sk, int cmd, unsigned long arg);
 extern int	   dccp_sendmsg(struct kiocb *iocb, struct sock *sk,
diff --git a/net/dccp/feat.c b/net/dccp/feat.c
index b04160a2eea5..972b8dc918d6 100644
--- a/net/dccp/feat.c
+++ b/net/dccp/feat.c
@@ -213,7 +213,7 @@ static int dccp_feat_default_value(u8 feat_num)
  */
 static const char *dccp_feat_fname(const u8 feat)
 {
-	static const char *feature_names[] = {
+	static const char *const feature_names[] = {
 		[DCCPF_RESERVED]	= "Reserved",
 		[DCCPF_CCID]		= "CCID",
 		[DCCPF_SHORT_SEQNOS]	= "Allow Short Seqnos",
@@ -236,8 +236,9 @@ static const char *dccp_feat_fname(const u8 feat)
 	return feature_names[feat];
 }
 
-static const char *dccp_feat_sname[] = { "DEFAULT", "INITIALISING", "CHANGING",
-					 "UNSTABLE", "STABLE" };
+static const char *const dccp_feat_sname[] = {
+	"DEFAULT", "INITIALISING", "CHANGING", "UNSTABLE", "STABLE",
+};
 
 #ifdef CONFIG_IP_DCCP_DEBUG
 static const char *dccp_feat_oname(const u8 opt)
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index a0a36c9e6cce..7302e1498d46 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -880,7 +880,7 @@ discard_and_relse:
 	goto discard_it;
 }
 
-static struct inet_connection_sock_af_ops dccp_ipv4_af_ops = {
+static const struct inet_connection_sock_af_ops dccp_ipv4_af_ops = {
 	.queue_xmit	   = ip_queue_xmit,
 	.send_check	   = dccp_v4_send_check,
 	.rebuild_header	   = inet_sk_rebuild_header,
@@ -948,7 +948,7 @@ static struct proto dccp_v4_prot = {
 #endif
 };
 
-static struct net_protocol dccp_v4_protocol = {
+static const struct net_protocol dccp_v4_protocol = {
 	.handler	= dccp_v4_rcv,
 	.err_handler	= dccp_v4_err,
 	.no_policy	= 1,
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 3e70faab2989..e48ca5d45658 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -35,8 +35,8 @@
 
 /* The per-net dccp.v6_ctl_sk is used for sending RSTs and ACKs */
 
-static struct inet_connection_sock_af_ops dccp_ipv6_mapped;
-static struct inet_connection_sock_af_ops dccp_ipv6_af_ops;
+static const struct inet_connection_sock_af_ops dccp_ipv6_mapped;
+static const struct inet_connection_sock_af_ops dccp_ipv6_af_ops;
 
 static void dccp_v6_hash(struct sock *sk)
 {
@@ -1055,7 +1055,7 @@ failure:
 	return err;
 }
 
-static struct inet_connection_sock_af_ops dccp_ipv6_af_ops = {
+static const struct inet_connection_sock_af_ops dccp_ipv6_af_ops = {
 	.queue_xmit	   = inet6_csk_xmit,
 	.send_check	   = dccp_v6_send_check,
 	.rebuild_header	   = inet6_sk_rebuild_header,
@@ -1076,7 +1076,7 @@ static struct inet_connection_sock_af_ops dccp_ipv6_af_ops = {
 /*
  *	DCCP over IPv4 via INET6 API
  */
-static struct inet_connection_sock_af_ops dccp_ipv6_mapped = {
+static const struct inet_connection_sock_af_ops dccp_ipv6_mapped = {
 	.queue_xmit	   = ip_queue_xmit,
 	.send_check	   = dccp_v4_send_check,
 	.rebuild_header	   = inet_sk_rebuild_header,
@@ -1152,13 +1152,13 @@ static struct proto dccp_v6_prot = {
 #endif
 };
 
-static struct inet6_protocol dccp_v6_protocol = {
+static const struct inet6_protocol dccp_v6_protocol = {
 	.handler	= dccp_v6_rcv,
 	.err_handler	= dccp_v6_err,
 	.flags		= INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL,
 };
 
-static struct proto_ops inet6_dccp_ops = {
+static const struct proto_ops inet6_dccp_ops = {
 	.family		   = PF_INET6,
 	.owner		   = THIS_MODULE,
 	.release	   = inet6_release,
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 1bca9205104e..a156319fd0ac 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -124,7 +124,7 @@ EXPORT_SYMBOL_GPL(dccp_done);
 
 const char *dccp_packet_name(const int type)
 {
-	static const char *dccp_packet_names[] = {
+	static const char *const dccp_packet_names[] = {
 		[DCCP_PKT_REQUEST]  = "REQUEST",
 		[DCCP_PKT_RESPONSE] = "RESPONSE",
 		[DCCP_PKT_DATA]	    = "DATA",
@@ -147,7 +147,7 @@ EXPORT_SYMBOL_GPL(dccp_packet_name);
 
 const char *dccp_state_name(const int state)
 {
-	static char *dccp_state_names[] = {
+	static const char *const dccp_state_names[] = {
 	[DCCP_OPEN]		= "OPEN",
 	[DCCP_REQUESTING]	= "REQUESTING",
 	[DCCP_PARTOPEN]		= "PARTOPEN",
@@ -393,7 +393,7 @@ out:
 EXPORT_SYMBOL_GPL(dccp_ioctl);
 
 static int dccp_setsockopt_service(struct sock *sk, const __be32 service,
-				   char __user *optval, int optlen)
+				   char __user *optval, unsigned int optlen)
 {
 	struct dccp_sock *dp = dccp_sk(sk);
 	struct dccp_service_list *sl = NULL;
@@ -464,7 +464,7 @@ static int dccp_setsockopt_cscov(struct sock *sk, int cscov, bool rx)
 }
 
 static int dccp_setsockopt_ccid(struct sock *sk, int type,
-				char __user *optval, int optlen)
+				char __user *optval, unsigned int optlen)
 {
 	u8 *val;
 	int rc = 0;
@@ -494,7 +494,7 @@ static int dccp_setsockopt_ccid(struct sock *sk, int type,
 }
 
 static int do_dccp_setsockopt(struct sock *sk, int level, int optname,
-		char __user *optval, int optlen)
+		char __user *optval, unsigned int optlen)
 {
 	struct dccp_sock *dp = dccp_sk(sk);
 	int val, err = 0;
@@ -546,7 +546,7 @@ static int do_dccp_setsockopt(struct sock *sk, int level, int optname,
 }
 
 int dccp_setsockopt(struct sock *sk, int level, int optname,
-		    char __user *optval, int optlen)
+		    char __user *optval, unsigned int optlen)
 {
 	if (level != SOL_DCCP)
 		return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level,
@@ -559,7 +559,7 @@ EXPORT_SYMBOL_GPL(dccp_setsockopt);
 
 #ifdef CONFIG_COMPAT
 int compat_dccp_setsockopt(struct sock *sk, int level, int optname,
-			   char __user *optval, int optlen)
+			   char __user *optval, unsigned int optlen)
 {
 	if (level != SOL_DCCP)
 		return inet_csk_compat_setsockopt(sk, level, optname,
@@ -1049,10 +1049,10 @@ static int __init dccp_init(void)
 	 *
 	 * The methodology is similar to that of the buffer cache.
 	 */
-	if (num_physpages >= (128 * 1024))
-		goal = num_physpages >> (21 - PAGE_SHIFT);
+	if (totalram_pages >= (128 * 1024))
+		goal = totalram_pages >> (21 - PAGE_SHIFT);
 	else
-		goal = num_physpages >> (23 - PAGE_SHIFT);
+		goal = totalram_pages >> (23 - PAGE_SHIFT);
 
 	if (thash_entries)
 		goal = (thash_entries *