sysctl: simplify ->strategy

name and nlen parameters passed to ->strategy hook are unused, remove
them. In general ->strategy hook should know what it's doing, and don't
do something tricky for which, say, pointer to original userspace array
may be needed (name).

Signed-off-by: Alexey Dobriyan <[e-mail]>
Acked-by: David S. Miller <[e-mail]> [ networking bits ]
Cc: Ralf Baechle <[e-mail]>
Cc: David Howells <[e-mail]>
Cc: Matt Mackall <[e-mail]>
Cc: "Eric W. Biederman" <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/frv/kernel/pm.c

···
 	return try_set_cmode(new_cmode)?:*lenp;
 }
 
-static int cmode_sysctl(ctl_table *table, int __user *name, int nlen,
+static int cmode_sysctl(ctl_table *table,
 			void __user *oldval, size_t __user *oldlenp,
 			void __user *newval, size_t newlen)
 {
···
 	return try_set_p0(new_p0)?:*lenp;
 }
 
-static int p0_sysctl(ctl_table *table, int __user *name, int nlen,
+static int p0_sysctl(ctl_table *table,
 		     void __user *oldval, size_t __user *oldlenp,
 		     void __user *newval, size_t newlen)
 {
···
 	return try_set_cm(new_cm)?:*lenp;
 }
 
-static int cm_sysctl(ctl_table *table, int __user *name, int nlen,
+static int cm_sysctl(ctl_table *table,
 		     void __user *oldval, size_t __user *oldlenp,
 		     void __user *newval, size_t newlen)
 {

arch/mips/lasat/sysctl.c

···
 #endif
 
 /* Strategy function to write EEPROM after changing string entry */
-int sysctl_lasatstring(ctl_table *table, int *name, int nlen,
+int sysctl_lasatstring(ctl_table *table,
 		void *oldval, size_t *oldlenp,
 		void *newval, size_t newlen)
 {
 	int r;
 
-	r = sysctl_string(table, name,
-			  nlen, oldval, oldlenp, newval, newlen);
+	r = sysctl_string(table, oldval, oldlenp, newval, newlen);
 	if (r < 0)
 		return r;
 
···
 #endif
 
 /* Sysctl for setting the IP addresses */
-int sysctl_lasat_intvec(ctl_table *table, int *name, int nlen,
+int sysctl_lasat_intvec(ctl_table *table,
 		    void *oldval, size_t *oldlenp,
 		    void *newval, size_t newlen)
 {
 	int r;
 
-	r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
+	r = sysctl_intvec(table, oldval, oldlenp, newval, newlen);
 	if (r < 0)
 		return r;
 
···
 
 #ifdef CONFIG_DS1603
 /* Same for RTC */
-int sysctl_lasat_rtc(ctl_table *table, int *name, int nlen,
+int sysctl_lasat_rtc(ctl_table *table,
 		    void *oldval, size_t *oldlenp,
 		    void *newval, size_t newlen)
 {
···
 	rtctmp = read_persistent_clock();
 	if (rtctmp < 0)
 		rtctmp = 0;
-	r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
+	r = sysctl_intvec(table, oldval, oldlenp, newval, newlen);
 	if (r < 0)
 		return r;
 	if (newval && newlen)
···
 }
 #endif
 
-static int sysctl_lasat_prid(ctl_table *table, int *name, int nlen,
+static int sysctl_lasat_prid(ctl_table *table,
 				     void *oldval, size_t *oldlenp,
 				     void *newval, size_t newlen)
 {
 	int r;
 
-	r = sysctl_intvec(table, name, nlen, oldval, oldlenp, newval, newlen);
+	r = sysctl_intvec(table, oldval, oldlenp, newval, newlen);
 	if (r < 0)
 		return r;
 	if (newval && newlen) {

drivers/char/random.c

···
 	return proc_dostring(&fake_table, write, filp, buffer, lenp, ppos);
 }
 
-static int uuid_strategy(ctl_table *table, int __user *name, int nlen,
+static int uuid_strategy(ctl_table *table,
 			 void __user *oldval, size_t __user *oldlenp,
 			 void __user *newval, size_t newlen)
 {

include/linux/sysctl.h

···
 
 typedef struct ctl_table ctl_table;
 
-typedef int ctl_handler (struct ctl_table *table, int __user *name, int nlen,
+typedef int ctl_handler (struct ctl_table *table,
 			 void __user *oldval, size_t __user *oldlenp,
 			 void __user *newval, size_t newlen);
 

include/net/ip.h

···
 int ipv4_doint_and_flush(ctl_table *ctl, int write,
 			 struct file* filp, void __user *buffer,
 			 size_t *lenp, loff_t *ppos);
-int ipv4_doint_and_flush_strategy(ctl_table *table, int __user *name, int nlen,
+int ipv4_doint_and_flush_strategy(ctl_table *table,
 				  void __user *oldval, size_t __user *oldlenp,
 				  void __user *newval, size_t newlen);
 #ifdef CONFIG_PROC_FS

include/net/ndisc.h

···
 							   void __user *buffer,
 							   size_t *lenp,
 							   loff_t *ppos);
-int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl, int __user *name,
-				 int nlen, void __user *oldval,
-				 size_t __user *oldlenp,
+int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl,
+				 void __user *oldval, size_t __user *oldlenp,
 				 void __user *newval, size_t newlen);
 #endif
 

ipc/ipc_sysctl.c

···
 
 #ifdef CONFIG_SYSCTL_SYSCALL
 /* The generic sysctl ipc data routine. */
-static int sysctl_ipc_data(ctl_table *table, int __user *name, int nlen,
+static int sysctl_ipc_data(ctl_table *table,
 		void __user *oldval, size_t __user *oldlenp,
 		void __user *newval, size_t newlen)
 {
···
 	return 1;
 }
 
-static int sysctl_ipc_registered_data(ctl_table *table, int __user *name,
-		int nlen, void __user *oldval, size_t __user *oldlenp,
+static int sysctl_ipc_registered_data(ctl_table *table,
+		void __user *oldval, size_t __user *oldlenp,
 		void __user *newval, size_t newlen)
 {
 	int rc;
 
-	rc = sysctl_ipc_data(table, name, nlen, oldval, oldlenp, newval,
-		newlen);
+	rc = sysctl_ipc_data(table, oldval, oldlenp, newval, newlen);
 
 	if (newval && newlen && rc > 0)
 		/*

kernel/sysctl.c

···
 /* Perform the actual read/write of a sysctl table entry. */
 static int do_sysctl_strategy(struct ctl_table_root *root,
 			struct ctl_table *table,
-			int __user *name, int nlen,
 			void __user *oldval, size_t __user *oldlenp,
 			void __user *newval, size_t newlen)
 {
···
 		return -EPERM;
 
 	if (table->strategy) {
-		rc = table->strategy(table, name, nlen, oldval, oldlenp,
-				     newval, newlen);
+		rc = table->strategy(table, oldval, oldlenp, newval, newlen);
 		if (rc < 0)
 			return rc;
 		if (rc > 0)
···
 	/* If there is no strategy routine, or if the strategy returns
 	 * zero, proceed with automatic r/w */
 	if (table->data && table->maxlen) {
-		rc = sysctl_data(table, name, nlen, oldval, oldlenp,
-				 newval, newlen);
+		rc = sysctl_data(table, oldval, oldlenp, newval, newlen);
 		if (rc < 0)
 			return rc;
 	}
···
 				table = table->child;
 				goto repeat;
 			}
-			error = do_sysctl_strategy(root, table, name, nlen,
+			error = do_sysctl_strategy(root, table,
 						   oldval, oldlenp,
 						   newval, newlen);
 			return error;
···
  */
 
 /* The generic sysctl data routine (used if no strategy routine supplied) */
-int sysctl_data(struct ctl_table *table, int __user *name, int nlen,
+int sysctl_data(struct ctl_table *table,
 		void __user *oldval, size_t __user *oldlenp,
 		void __user *newval, size_t newlen)
 {
···
 }
 
 /* The generic string strategy routine: */
-int sysctl_string(struct ctl_table *table, int __user *name, int nlen,
+int sysctl_string(struct ctl_table *table,
 		  void __user *oldval, size_t __user *oldlenp,
 		  void __user *newval, size_t newlen)
 {
···
  * are between the minimum and maximum values given in the arrays
  * table->extra1 and table->extra2, respectively.
  */
-int sysctl_intvec(struct ctl_table *table, int __user *name, int nlen,
+int sysctl_intvec(struct ctl_table *table,
 		void __user *oldval, size_t __user *oldlenp,
 		void __user *newval, size_t newlen)
 {
···
 }
 
 /* Strategy function to convert jiffies to seconds */ 
-int sysctl_jiffies(struct ctl_table *table, int __user *name, int nlen,
+int sysctl_jiffies(struct ctl_table *table,
 		void __user *oldval, size_t __user *oldlenp,
 		void __user *newval, size_t newlen)
 {
···
 }
 
 /* Strategy function to convert jiffies to seconds */ 
-int sysctl_ms_jiffies(struct ctl_table *table, int __user *name, int nlen,
+int sysctl_ms_jiffies(struct ctl_table *table,
 		void __user *oldval, size_t __user *oldlenp,
 		void __user *newval, size_t newlen)
 {
···
 	return error;
 }
 
-int sysctl_data(struct ctl_table *table, int __user *name, int nlen,
+int sysctl_data(struct ctl_table *table,
 		  void __user *oldval, size_t __user *oldlenp,
 		  void __user *newval, size_t newlen)
 {
 	return -ENOSYS;
 }
 
-int sysctl_string(struct ctl_table *table, int __user *name, int nlen,
+int sysctl_string(struct ctl_table *table,
 		  void __user *oldval, size_t __user *oldlenp,
 		  void __user *newval, size_t newlen)
 {
 	return -ENOSYS;
 }
 
-int sysctl_intvec(struct ctl_table *table, int __user *name, int nlen,
+int sysctl_intvec(struct ctl_table *table,
 		void __user *oldval, size_t __user *oldlenp,
 		void __user *newval, size_t newlen)
 {
 	return -ENOSYS;
 }
 
-int sysctl_jiffies(struct ctl_table *table, int __user *name, int nlen,
+int sysctl_jiffies(struct ctl_table *table,
 		void __user *oldval, size_t __user *oldlenp,
 		void __user *newval, size_t newlen)
 {
 	return -ENOSYS;
 }
 
-int sysctl_ms_jiffies(struct ctl_table *table, int __user *name, int nlen,
+int sysctl_ms_jiffies(struct ctl_table *table,
 		void __user *oldval, size_t __user *oldlenp,
 		void __user *newval, size_t newlen)
 {

kernel/utsname_sysctl.c

···
 
 #ifdef CONFIG_SYSCTL_SYSCALL
 /* The generic string strategy routine: */
-static int sysctl_uts_string(ctl_table *table, int __user *name, int nlen,
+static int sysctl_uts_string(ctl_table *table,
 		  void __user *oldval, size_t __user *oldlenp,
 		  void __user *newval, size_t newlen)
 {
···
 	write = newval && newlen;
 	memcpy(&uts_table, table, sizeof(uts_table));
 	uts_table.data = get_uts(table, write);
-	r = sysctl_string(&uts_table, name, nlen,
-		oldval, oldlenp, newval, newlen);
+	r = sysctl_string(&uts_table, oldval, oldlenp, newval, newlen);
 	put_uts(table, write, uts_table.data);
 	return r;
 }

net/decnet/dn_dev.c

···
 
 static int dn_forwarding_proc(ctl_table *, int, struct file *,
 			void __user *, size_t *, loff_t *);
-static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
+static int dn_forwarding_sysctl(ctl_table *table,
 			void __user *oldval, size_t __user *oldlenp,
 			void __user *newval, size_t newlen);
 
···
 #endif
 }
 
-static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
+static int dn_forwarding_sysctl(ctl_table *table,
 			void __user *oldval, size_t __user *oldlenp,
 			void __user *newval, size_t newlen)
 {

net/decnet/sysctl_net_decnet.c

···
 }
 
 
-static int dn_node_address_strategy(ctl_table *table, int __user *name, int nlen,
+static int dn_node_address_strategy(ctl_table *table,
 				void __user *oldval, size_t __user *oldlenp,
 				void __user *newval, size_t newlen)
 {
···
 }
 
 
-static int dn_def_dev_strategy(ctl_table *table, int __user *name, int nlen,
+static int dn_def_dev_strategy(ctl_table *table,
 				void __user *oldval, size_t __user *oldlenp,
 				void __user *newval, size_t newlen)
 {

net/ipv4/devinet.c

···
 	return ret;
 }
 
-static int devinet_conf_sysctl(ctl_table *table, int __user *name, int nlen,
+static int devinet_conf_sysctl(ctl_table *table,
 			       void __user *oldval, size_t __user *oldlenp,
 			       void __user *newval, size_t newlen)
 {
···
 	return ret;
 }
 
-int ipv4_doint_and_flush_strategy(ctl_table *table, int __user *name, int nlen,
+int ipv4_doint_and_flush_strategy(ctl_table *table,
 				  void __user *oldval, size_t __user *oldlenp,
 				  void __user *newval, size_t newlen)
 {
-	int ret = devinet_conf_sysctl(table, name, nlen, oldval, oldlenp,
-				      newval, newlen);
+	int ret = devinet_conf_sysctl(table, oldval, oldlenp, newval, newlen);
 	struct net *net = table->extra2;
 
 	if (ret == 1)

net/ipv4/route.c

···
 }
 
 static int ipv4_sysctl_rtcache_flush_strategy(ctl_table *table,
-						int __user *name,
-						int nlen,
 						void __user *oldval,
 						size_t __user *oldlenp,
 						void __user *newval,
···
 }
 
 static int ipv4_sysctl_rt_secret_interval_strategy(ctl_table *table,
-						   int __user *name,
-						   int nlen,
 						   void __user *oldval,
 						   size_t __user *oldlenp,
 						   void __user *newval,
 						   size_t newlen)
 {
 	int old = ip_rt_secret_interval;
-	int ret = sysctl_jiffies(table, name, nlen, oldval, oldlenp, newval,
-				 newlen);
+	int ret = sysctl_jiffies(table, oldval, oldlenp, newval, newlen);
 
 	rt_secret_reschedule(old);
 

net/ipv4/sysctl_net_ipv4.c

···
 }
 
 /* Validate changes from sysctl interface. */
-static int ipv4_sysctl_local_port_range(ctl_table *table, int __user *name,
-					 int nlen, void __user *oldval,
+static int ipv4_sysctl_local_port_range(ctl_table *table,
+					 void __user *oldval,
 					 size_t __user *oldlenp,
 					void __user *newval, size_t newlen)
 {
···
 	};
 
 	inet_get_local_port_range(range, range + 1);
-	ret = sysctl_intvec(&tmp, name, nlen, oldval, oldlenp, newval, newlen);
+	ret = sysctl_intvec(&tmp, oldval, oldlenp, newval, newlen);
 	if (ret == 0 && newval && newlen) {
 		if (range[1] < range[0])
 			ret = -EINVAL;
···
 	return ret;
 }
 
-static int sysctl_tcp_congestion_control(ctl_table *table, int __user *name,
-					 int nlen, void __user *oldval,
+static int sysctl_tcp_congestion_control(ctl_table *table,
+					 void __user *oldval,
 					 size_t __user *oldlenp,
 					 void __user *newval, size_t newlen)
 {
···
 	int ret;
 
 	tcp_get_default_congestion_control(val);
-	ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen);
+	ret = sysctl_string(&tbl, oldval, oldlenp, newval, newlen);
 	if (ret == 1 && newval && newlen)
 		ret = tcp_set_default_congestion_control(val);
 	return ret;
···
 	return ret;
 }
 
-static int strategy_allowed_congestion_control(ctl_table *table, int __user *name,
-					       int nlen, void __user *oldval,
+static int strategy_allowed_congestion_control(ctl_table *table,
+					       void __user *oldval,
 					       size_t __user *oldlenp,
 					       void __user *newval,
 					       size_t newlen)
···
 		return -ENOMEM;
 
 	tcp_get_available_congestion_control(tbl.data, tbl.maxlen);
-	ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen);
+	ret = sysctl_string(&tbl, oldval, oldlenp, newval, newlen);
 	if (ret == 1 && newval && newlen)
 		ret = tcp_set_allowed_congestion_control(tbl.data);
 	kfree(tbl.data);

net/ipv6/addrconf.c

···
 }
 
 static int addrconf_sysctl_forward_strategy(ctl_table *table,
-					    int __user *name, int nlen,
 					    void __user *oldval,
 					    size_t __user *oldlenp,
 					    void __user *newval, size_t newlen)

net/ipv6/ndisc.c

···
 	return ret;
 }
 
-int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl, int __user *name,
-				 int nlen, void __user *oldval,
-				 size_t __user *oldlenp,
+int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl,
+				 void __user *oldval, size_t __user *oldlenp,
 				 void __user *newval, size_t newlen)
 {
 	struct net_device *dev = ctl->extra1;
···
 
 	switch (ctl->ctl_name) {
 	case NET_NEIGH_REACHABLE_TIME:
-		ret = sysctl_jiffies(ctl, name, nlen,
-				     oldval, oldlenp, newval, newlen);
+		ret = sysctl_jiffies(ctl, oldval, oldlenp, newval, newlen);
 		break;
 	case NET_NEIGH_RETRANS_TIME_MS:
 	case NET_NEIGH_REACHABLE_TIME_MS:
-		 ret = sysctl_ms_jiffies(ctl, name, nlen,
-					 oldval, oldlenp, newval, newlen);
+		 ret = sysctl_ms_jiffies(ctl, oldval, oldlenp, newval, newlen);
 		 break;
 	default:
 		ret = 0;