uml: remove duplicate config symbol and unused file and variables

Fix the repetition of the NET symbol.  It was once in UML specific options and
once in networking.  I removed the first occurrence, as it makes more sense to
me to keep it only in networking.

It also removes a mostly empty file which is not used anymore and some
unused variables.

Signed-off-by: Karol Swietlicki <magotari@gmail.com>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/um/Kconfig

@@ -95,23 +95,6 @@ config LD_SCRIPT_DYN
 	default y
 	depends on !LD_SCRIPT_STATIC
 
-config NET
-	bool "Networking support"
-	help
-	  Unless you really know what you are doing, you should say Y here.
-	  The reason is that some programs need kernel networking support even
-	  when running on a stand-alone machine that isn't connected to any
-	  other computer. If you are upgrading from an older kernel, you
-	  should consider updating your networking tools too because changes
-	  in the kernel and the tools often go hand in hand. The tools are
-	  contained in the package net-tools, the location and version number
-	  of which are given in <file:Documentation/Changes>.
-
-	  For a general introduction to Linux networking, it is highly
-	  recommended to read the NET-HOWTO, available from
-	  <http://www.tldp.org/docs.html#howto>.
-
-
 source "fs/Kconfig.binfmt"
 
 config HOSTFS

arch/um/drivers/mconsole_kern.c

@@ -741,7 +741,6 @@ void mconsole_stack(struct mc_request *req)
 {
 	char *ptr = req->request.data;
 	int pid_requested= -1;
-	struct task_struct *from = NULL;
 	struct task_struct *to = NULL;
 
 	/*
@@ -763,8 +762,6 @@ void mconsole_stack(struct mc_request *req)
 		return;
 	}
 
-	from = current;
-
 	to = find_task_by_pid(pid_requested);
 	if ((to == NULL) || (pid_requested == 0)) {
 		mconsole_reply(req, "Couldn't find that pid", 1, 0);

arch/um/kernel/process.c

@@ -30,7 +30,7 @@
  */
 struct cpu_task cpu_tasks[NR_CPUS] = { [0 ... NR_CPUS - 1] = { -1, NULL } };
 
-static inline int external_pid(struct task_struct *task)
+static inline int external_pid(void)
 {
 	/* FIXME: Need to look up userspace_pid by cpu */
 	return userspace_pid[0];
@@ -78,7 +78,7 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 static inline void set_current(struct task_struct *task)
 {
 	cpu_tasks[task_thread_info(task)->cpu] = ((struct cpu_task)
-		{ external_pid(task), task });
+		{ external_pid(), task });
 }
 
 extern void arch_switch_to(struct task_struct *to);