uml: throw out CONFIG_MODE_TT

This patchset throws out tt mode, which has been non-functional for a while.

This is done in phases, interspersed with code cleanups on the affected files.

The removal is done as follows:
	remove all code, config options, and files which depend on
CONFIG_MODE_TT
	get rid of the CHOOSE_MODE macro, which decided whether to
call tt-mode or skas-mode code, and replace invocations with their
skas portions
	replace all now-trivial procedures with their skas equivalents

There are now a bunch of now-redundant pieces of data structures, including
mode-specific pieces of the thread structure, pt_regs, and mm_context.  These
are all replaced with their skas-specific contents.

As part of the ongoing style compliance project, I made a style pass over all
files that were changed.  There are three such patches, one for each phase,
covering the files affected by that phase but no later ones.

I noticed that we weren't freeing the LDT state associated with a process when
it exited, so that's fixed in one of the later patches.

The last patch is a tidying patch which I've had for a while, but which caused
inexplicable crashes under tt mode.  Since that is no longer a problem, this
can now go in.

This patch:

Start getting rid of tt mode support.

This patch throws out CONFIG_MODE_TT and all config options, code, and files
which depend on it.

CONFIG_MODE_SKAS is gone and everything that depends on it is included
unconditionally.

The few changed lines are in re-written Kconfig help, lines which needed
something skas-related removed from them, and a few more which weren't
strictly deletions.

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>

37 files changed, 6 insertions, 3092 deletions

diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index c5cf4a0827b..6651937a2d2 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -9,15 +9,12 @@ clean-files :=
 obj-y = config.o exec.o exitcode.o init_task.o irq.o ksyms.o mem.o \
 	physmem.o process.o ptrace.o reboot.o sigio.o \
 	signal.o smp.o syscall.o sysrq.o time.o tlb.o trap.o uaccess.o \
-	um_arch.o umid.o
+	um_arch.o umid.o skas/
 
 obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
 obj-$(CONFIG_GPROF)	+= gprof_syms.o
 obj-$(CONFIG_GCOV)	+= gmon_syms.o
 
-obj-$(CONFIG_MODE_TT) += tt/
-obj-$(CONFIG_MODE_SKAS) += skas/
-
 USER_OBJS := config.o
 
 include arch/um/scripts/Makefile.rules
diff --git a/arch/um/kernel/dyn.lds.S b/arch/um/kernel/dyn.lds.S
index 41850906116..3866f4960f0 100644
--- a/arch/um/kernel/dyn.lds.S
+++ b/arch/um/kernel/dyn.lds.S
@@ -10,8 +10,6 @@ SECTIONS
   PROVIDE (__executable_start = START);
   . = START + SIZEOF_HEADERS;
   .interp         : { *(.interp) }
-  /* Used in arch/um/kernel/mem.c. Any memory between START and __binary_start
-   * is remapped.*/
   __binary_start = .;
   . = ALIGN(4096);		/* Init code and data */
   _text = .;
diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c
index ce6828fd396..84d77a0d138 100644
--- a/arch/um/kernel/exec.c
+++ b/arch/um/kernel/exec.c
@@ -57,7 +57,6 @@ static long execve1(char *file, char __user * __user *argv,
 		SUBARCH_EXECVE1(&current->thread.regs.regs);
 #endif
 		task_unlock(current);
-                set_cmdline(current_cmd());
         }
         return(error);
 }
diff --git a/arch/um/kernel/init_task.c b/arch/um/kernel/init_task.c
index fa90db964b2..33055082356 100644
--- a/arch/um/kernel/init_task.c
+++ b/arch/um/kernel/init_task.c
@@ -46,10 +46,3 @@ union thread_union init_thread_union
 union thread_union cpu0_irqstack
 	__attribute__((__section__(".data.init_irqstack"))) =
 		{ INIT_THREAD_INFO(init_task) };
-
-#ifdef CONFIG_MODE_TT
-void unprotect_stack(unsigned long stack)
-{
-	os_protect_memory((void *) stack, THREAD_SIZE, 1, 1, 0);
-}
-#endif
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index cf0dd9cf8c4..ec1ed680032 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -339,30 +339,6 @@ int deactivate_all_fds(void)
 	return 0;
 }
 
-#ifdef CONFIG_MODE_TT
-void forward_interrupts(int pid)
-{
-	struct irq_fd *irq;
-	unsigned long flags;
-	int err;
-
-	spin_lock_irqsave(&irq_lock, flags);
-	for (irq = active_fds; irq != NULL; irq = irq->next) {
-		err = os_set_owner(irq->fd, pid);
-		if (err < 0) {
-			/* XXX Just remove the irq rather than
-			 * print out an infinite stream of these
-			 */
-			printk("Failed to forward %d to pid %d, err = %d\n",
-			       irq->fd, pid, -err);
-		}
-
-		irq->pid = pid;
-	}
-	spin_unlock_irqrestore(&irq_lock, flags);
-}
-#endif
-
 /*
  * do_IRQ handles all normal device IRQ's (the special
  * SMP cross-CPU interrupts have their own specific
diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c
index 7b3e53fb807..59e22d27b23 100644
--- a/arch/um/kernel/ksyms.c
+++ b/arch/um/kernel/ksyms.c
@@ -34,24 +34,14 @@ EXPORT_SYMBOL(get_kmem_end);
 EXPORT_SYMBOL(high_physmem);
 EXPORT_SYMBOL(empty_zero_page);
 EXPORT_SYMBOL(um_virt_to_phys);
-EXPORT_SYMBOL(mode_tt);
 EXPORT_SYMBOL(handle_page_fault);
 EXPORT_SYMBOL(find_iomem);
 
-#ifdef CONFIG_MODE_TT
-EXPORT_SYMBOL(stop);
-EXPORT_SYMBOL(strncpy_from_user_tt);
-EXPORT_SYMBOL(copy_from_user_tt);
-EXPORT_SYMBOL(copy_to_user_tt);
-#endif
-
-#ifdef CONFIG_MODE_SKAS
 EXPORT_SYMBOL(strnlen_user_skas);
 EXPORT_SYMBOL(strncpy_from_user_skas);
 EXPORT_SYMBOL(copy_to_user_skas);
 EXPORT_SYMBOL(copy_from_user_skas);
 EXPORT_SYMBOL(clear_user_skas);
-#endif
 EXPORT_SYMBOL(uml_strdup);
 
 EXPORT_SYMBOL(os_stat_fd);
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index f083787410a..005ed44d4a8 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -183,13 +183,6 @@ void initial_thread_cb(void (*proc)(void *), void *arg)
 	kmalloc_ok = save_kmalloc_ok;
 }
 
-#ifdef CONFIG_MODE_TT
-unsigned long stack_sp(unsigned long page)
-{
-	return page + PAGE_SIZE - sizeof(void *);
-}
-#endif
-
 void default_idle(void)
 {
 	CHOOSE_MODE(uml_idle_timer(), (void) 0);
diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c
index 7e4305a1fd3..93df0672d02 100644
--- a/arch/um/kernel/reboot.c
+++ b/arch/um/kernel/reboot.c
@@ -14,28 +14,9 @@
 
 void (*pm_power_off)(void);
 
-#ifdef CONFIG_SMP
-static void kill_idlers(int me)
-{
-#ifdef CONFIG_MODE_TT
-	struct task_struct *p;
-	int i;
-
-	for(i = 0; i < ARRAY_SIZE(idle_threads); i++){
-		p = idle_threads[i];
-		if((p != NULL) && (p->thread.mode.tt.extern_pid != me))
-			os_kill_process(p->thread.mode.tt.extern_pid, 0);
-	}
-#endif
-}
-#endif
-
 static void kill_off_processes(void)
 {
 	CHOOSE_MODE(kill_off_processes_tt(), kill_off_processes_skas());
-#ifdef CONFIG_SMP
-	kill_idlers(os_getpid());
-#endif
 }
 
 void uml_cleanup(void)
diff --git a/arch/um/kernel/smp.c b/arch/um/kernel/smp.c
index e6a7778006a..15bb5436577 100644
--- a/arch/um/kernel/smp.c
+++ b/arch/um/kernel/smp.c
@@ -95,7 +95,6 @@ static int idle_proc(void *cpup)
 static struct task_struct *idle_thread(int cpu)
 {
 	struct task_struct *new_task;
-	unsigned char c;
 
 	current->thread.request.u.thread.proc = idle_proc;
 	current->thread.request.u.thread.arg = (void *) cpu;
@@ -108,9 +107,7 @@ static struct task_struct *idle_thread(int cpu)
 		          { .pid = 	new_task->thread.mode.tt.extern_pid,
 			    .task = 	new_task } );
 	idle_threads[cpu] = new_task;
-	CHOOSE_MODE(os_write_file(new_task->thread.mode.tt.switch_pipe[1], &c,
-				  sizeof(c)),
-		    ({ panic("skas mode doesn't support SMP"); }));
+	panic("skas mode doesn't support SMP");
 	return new_task;
 }
 
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c
index 3850d53f79f..c517c449d0d 100644
--- a/arch/um/kernel/trap.c
+++ b/arch/um/kernel/trap.c
@@ -29,9 +29,7 @@
 #include "sysdep/sigcontext.h"
 #include "sysdep/ptrace.h"
 #include "os.h"
-#ifdef CONFIG_MODE_SKAS
 #include "skas.h"
-#endif
 #include "os.h"
 
 /* Note this is constrained to return 0, -EFAULT, -EACCESS, -ENOMEM by segv(). */
diff --git a/arch/um/kernel/tt/Makefile b/arch/um/kernel/tt/Makefile
deleted file mode 100644
index 6939e5af847..00000000000
--- a/arch/um/kernel/tt/Makefile
+++ /dev/null
@@ -1,14 +0,0 @@
-# 
-# Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com)
-# Licensed under the GPL
-#
-
-obj-y = exec_kern.o exec_user.o gdb.o ksyms.o mem.o mem_user.o process_kern.o \
-	syscall_kern.o syscall_user.o tlb.o tracer.o trap_user.o \
-	uaccess.o uaccess_user.o
-
-obj-$(CONFIG_PT_PROXY) += gdb_kern.o ptproxy/
-
-USER_OBJS := gdb.o tracer.o
-
-include arch/um/scripts/Makefile.rules
diff --git a/arch/um/kernel/tt/exec_kern.c b/arch/um/kernel/tt/exec_kern.c
deleted file mode 100644
index 40126cb5180..00000000000
--- a/arch/um/kernel/tt/exec_kern.c
+++ /dev/null
@@ -1,84 +0,0 @@
-/* 
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include "linux/kernel.h"
-#include "linux/mm.h"
-#include "asm/signal.h"
-#include "asm/ptrace.h"
-#include "asm/uaccess.h"
-#include "asm/pgalloc.h"
-#include "asm/tlbflush.h"
-#include "kern_util.h"
-#include "irq_user.h"
-#include "mem_user.h"
-#include "os.h"
-#include "tlb.h"
-#include "mode.h"
-
-static int exec_tramp(void *sig_stack)
-{
-	init_new_thread_stack(sig_stack, NULL);
-	init_new_thread_signals();
-	os_stop_process(os_getpid());
-	return(0);
-}
-
-void flush_thread_tt(void)
-{
-	unsigned long stack;
-	int new_pid;
-
-	stack = alloc_stack(0, 0);
-	if(stack == 0){
-		printk(KERN_ERR 
-		       "flush_thread : failed to allocate temporary stack\n");
-		do_exit(SIGKILL);
-	}
-		
-	new_pid = start_fork_tramp(task_stack_page(current), stack, 0, exec_tramp);
-	if(new_pid < 0){
-		printk(KERN_ERR 
-		       "flush_thread : new thread failed, errno = %d\n",
-		       -new_pid);
-		do_exit(SIGKILL);
-	}
-
-	if(current_thread->cpu == 0)
-		forward_interrupts(new_pid);
-	current->thread.request.op = OP_EXEC;
-	current->thread.request.u.exec.pid = new_pid;
-	unprotect_stack((unsigned long) current_thread);
-	os_usr1_process(os_getpid());
-	change_sig(SIGUSR1, 1);
-
-	change_sig(SIGUSR1, 0);
-	enable_timer();
-	free_page(stack);
-	protect_memory(uml_reserved, high_physmem - uml_reserved, 1, 1, 0, 1);
-	stack_protections((unsigned long) current_thread);
-	force_flush_all();
-	unblock_signals();
-}
-
-void start_thread_tt(struct pt_regs *regs, unsigned long eip, 
-		     unsigned long esp)
-{
-	set_fs(USER_DS);
-	flush_tlb_mm(current->mm);
-	PT_REGS_IP(regs) = eip;
-	PT_REGS_SP(regs) = esp;
-	PT_FIX_EXEC_STACK(esp);
-}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/tt/exec_user.c b/arch/um/kernel/tt/exec_user.c
deleted file mode 100644
index 7b5f2181cf5..00000000000
--- a/arch/um/kernel/tt/exec_user.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/* 
- * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <stdio.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <sched.h>
-#include <errno.h>
-#include <sys/wait.h>
-#include <signal.h>
-#include "kern_util.h"
-#include "user.h"
-#include "ptrace_user.h"
-#include "os.h"
-
-void do_exec(int old_pid, int new_pid)
-{
-	unsigned long regs[FRAME_SIZE];
-	int err;
-
-	if((ptrace(PTRACE_ATTACH, new_pid, 0, 0) < 0) ||
-	   (ptrace(PTRACE_CONT, new_pid, 0, 0) < 0))
-		tracer_panic("do_exec failed to attach proc - errno = %d",
-			     errno);
-
-	CATCH_EINTR(err = waitpid(new_pid, 0, WUNTRACED));
-	if (err < 0)
-		tracer_panic("do_exec failed to attach proc in waitpid - errno = %d",
-			     errno);
-
-	if(ptrace_getregs(old_pid, regs) < 0)
-		tracer_panic("do_exec failed to get registers - errno = %d",
-			     errno);
-
-	os_kill_ptraced_process(old_pid, 0);
-
-	if (ptrace(PTRACE_OLDSETOPTIONS, new_pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0)
-		tracer_panic("do_exec: PTRACE_SETOPTIONS failed, errno = %d", errno);
-
-	if(ptrace_setregs(new_pid, regs) < 0)
-		tracer_panic("do_exec failed to start new proc - errno = %d",
-			     errno);
-}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/tt/gdb.c b/arch/um/kernel/tt/gdb.c
deleted file mode 100644
index 030e4658f36..00000000000
--- a/arch/um/kernel/tt/gdb.c
+++ /dev/null
@@ -1,280 +0,0 @@
-/* 
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <string.h>
-#include <signal.h>
-#include <sys/types.h>
-#include "ptrace_user.h"
-#include "uml-config.h"
-#include "kern_constants.h"
-#include "chan_user.h"
-#include "init.h"
-#include "user.h"
-#include "debug.h"
-#include "kern_util.h"
-#include "tt.h"
-#include "sysdep/thread.h"
-#include "os.h"
-
-extern int debugger_pid;
-extern int debugger_fd;
-extern int debugger_parent;
-
-int detach(int pid, int sig)
-{
-	return(ptrace(PTRACE_DETACH, pid, 0, sig));
-}
-
-int attach(int pid)
-{
-	int err;
-
-	err = ptrace(PTRACE_ATTACH, pid, 0, 0);
-	if(err < 0) return(-errno);
-	else return(err);
-}
-
-int cont(int pid)
-{
-	return(ptrace(PTRACE_CONT, pid, 0, 0));
-}
-
-#ifdef UML_CONFIG_PT_PROXY
-
-int debugger_signal(int status, pid_t pid)
-{
-	return(debugger_proxy(status, pid));
-}
-
-void child_signal(pid_t pid, int status)
-{
-	child_proxy(pid, status);
-}
-
-static void gdb_announce(char *dev_name, int dev)
-{
-	printf("gdb assigned device '%s'\n", dev_name);
-}
-
-static struct chan_opts opts = {
-	.announce  	= gdb_announce,
-	.xterm_title 	= "UML kernel debugger",
-	.raw 		= 0,
-	.tramp_stack 	= 0,
-	.in_kernel  	= 0,
-};
-
-/* Accessed by the tracing thread, which automatically serializes access */
-static void *xterm_data;
-static int xterm_fd;
-
-extern void *xterm_init(char *, int, struct chan_opts *);
-extern int xterm_open(int, int, int, void *, char **);
-extern void xterm_close(int, void *);
-
-int open_gdb_chan(void)
-{
-	char stack[UM_KERN_PAGE_SIZE], *dummy;
-
-	opts.tramp_stack = (unsigned long) stack;
-	xterm_data = xterm_init("", 0, &opts);
-	xterm_fd = xterm_open(1, 1, 1, xterm_data, &dummy);
-	return(xterm_fd);
-}
-
-static void exit_debugger_cb(void *unused)
-{
-	if(debugger_pid != -1){
-		if(gdb_pid != -1){
-			fake_child_exit();
-			gdb_pid = -1;
-		}
-		else kill_child_dead(debugger_pid);
-		debugger_pid = -1;
-		if(debugger_parent != -1)
-			detach(debugger_parent, SIGINT);
-	}
-	if(xterm_data != NULL) xterm_close(xterm_fd, xterm_data);
-}
-
-static void exit_debugger(void)
-{
-	initial_thread_cb(exit_debugger_cb, NULL);
-}
-
-__uml_exitcall(exit_debugger);
-
-struct gdb_data {
-	char *str;
-	int err;
-};
-
-extern char *linux_prog;
-
-static void config_gdb_cb(void *arg)
-{
-	struct gdb_data *data = arg;
-	void *task;
-	int pid;
-
-	data->err = -1;
-	if(debugger_pid != -1) exit_debugger_cb(NULL);
-	if(!strncmp(data->str, "pid,", strlen("pid,"))){
-		data->str += strlen("pid,");
-		pid = strtoul(data->str, NULL, 0);
-		task = cpu_tasks[0].task;
-		debugger_pid = attach_debugger(TASK_EXTERN_PID(task), pid, 0);
-		if(debugger_pid != -1){
-			data->err = 0;
-			gdb_pid = pid;
-		}
-		return;
-	}
-	data->err = 0;
-	debugger_pid = start_debugger(linux_prog, 0, 0, &debugger_fd);
-	init_proxy(debugger_pid, 0, 0);
-}
-
-int gdb_config(char *str, char **error_out)
-{
-	struct gdb_data data;
-
-	if(*str++ != '=') return(-1);
-	data.str = str;
-	initial_thread_cb(config_gdb_cb, &data);
-	return(data.err);
-}
-
-void remove_gdb_cb(void *unused)
-{
-	exit_debugger_cb(NULL);
-}
-
-int gdb_remove(int unused, char **error_out)
-{
-	initial_thread_cb(remove_gdb_cb, NULL);
-        return 0;
-}
-
-void signal_usr1(int sig)
-{
-	if(debugger_pid != -1){
-		printf("The debugger is already running\n");
-		return;
-	}
-	debugger_pid = start_debugger(linux_prog, 0, 0, &debugger_fd);
-	init_proxy(debugger_pid, 0, 0);
-}
-
-int init_ptrace_proxy(int idle_pid, int startup, int stop)
-{
-	int pid, status;
-
-	pid = start_debugger(linux_prog, startup, stop, &debugger_fd);
-	status = wait_for_stop(idle_pid, SIGSTOP, PTRACE_CONT, NULL);
- 	if(pid < 0){
-		cont(idle_pid);
-		return(-1);
-	}
-	init_proxy(pid, 1, status);
-	return(pid);
-}
-
-int attach_debugger(int idle_pid, int pid, int stop)
-{
-	int status = 0, err;
-
-	err = attach(pid);
-	if(err < 0){
-		printf("Failed to attach pid %d, errno = %d\n", pid, -err);
-		return(-1);
-	}
-	if(stop) status = wait_for_stop(idle_pid, SIGSTOP, PTRACE_CONT, NULL);
-	init_proxy(pid, 1, status);
-	return(pid);
-}
-
-#ifdef notdef /* Put this back in when it does something useful */
-static int __init uml_gdb_init_setup(char *line, int *add)
-{
-	gdb_init = uml_strdup(line);
-	return 0;
-}
-
-__uml_setup("gdb=", uml_gdb_init_setup, 
-"gdb=<channel description>\n\n"
-);
-#endif
-
-static int __init uml_gdb_pid_setup(char *line, int *add)
-{
-	gdb_pid = strtoul(line, NULL, 0);
-	*add = 0;
-	return 0;
-}
-
-__uml_setup("gdb-pid=", uml_gdb_pid_setup, 
-"gdb-pid=<pid>\n"
-"    gdb-pid is used to attach an external debugger to UML.  This may be\n"
-"    an already-running gdb or a debugger-like process like strace.\n\n"
-);
-
-#else
-
-int debugger_signal(int status, pid_t pid){ return(0); }
-void child_signal(pid_t pid, int status){ }
-int init_ptrace_proxy(int idle_pid, int startup, int stop)
-{
-	printf("debug requested when CONFIG_PT_PROXY is off\n");
-	kill_child_dead(idle_pid);
-	exit(1);
-}
-
-void signal_usr1(int sig)
-{
-	printf("debug requested when CONFIG_PT_PROXY is off\n");
-}
-
-int attach_debugger(int idle_pid, int pid, int stop)
-{
-	printf("attach_debugger called when CONFIG_PT_PROXY "
-	       "is off\n");
-	return(-1);
-}
-
-int config_gdb(char *str)
-{
-	return(-1);
-}
-
-int remove_gdb(void)
-{
-	return(-1);
-}
-
-int init_parent_proxy(int pid)
-{
-	return(-1);
-}
-
-void debugger_parent_signal(int status, int pid)
-{
-}
-
-#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/tt/gdb_kern.c b/arch/um/kernel/tt/gdb_kern.c
deleted file mode 100644
index 03b06bc0077..00000000000
--- a/arch/um/kernel/tt/gdb_kern.c
+++ /dev/null
@@ -1,40 +0,0 @@
-/* 
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include "linux/init.h"
-#include "mconsole_kern.h"
-
-#ifdef CONFIG_MCONSOLE
-
-extern int gdb_config(char *str, char **error_out);
-extern int gdb_remove(int n, char **error_out);
-
-static struct mc_device gdb_mc = {
-	.list		= INIT_LIST_HEAD(gdb_mc.list),
-	.name		= "gdb",
-	.config		= gdb_config,
-	.remove		= gdb_remove,
-};
-
-int gdb_mc_init(void)
-{
-	mconsole_register_dev(&gdb_mc);
-	return(0);
-}
-
-__initcall(gdb_mc_init);
-
-#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/tt/include/mode-tt.h b/arch/um/kernel/tt/include/mode-tt.h
deleted file mode 100644
index e171e15fead..00000000000
--- a/arch/um/kernel/tt/include/mode-tt.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __MODE_TT_H__
-#define __MODE_TT_H__
-
-#include "sysdep/ptrace.h"
-
-enum { OP_NONE, OP_EXEC, OP_FORK, OP_TRACE_ON, OP_REBOOT, OP_HALT, OP_CB };
-
-extern int tracing_pid;
-
-extern int tracer(int (*init_proc)(void *), void *sp);
-extern void sig_handler_common_tt(int sig, void *sc);
-extern void syscall_handler_tt(int sig, union uml_pt_regs *regs);
-extern void reboot_tt(void);
-extern void halt_tt(void);
-extern int is_tracer_winch(int pid, int fd, void *data);
-extern void kill_off_processes_tt(void);
-
-#endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/tt/ksyms.c b/arch/um/kernel/tt/ksyms.c
deleted file mode 100644
index 84a9385a8fe..00000000000
--- a/arch/um/kernel/tt/ksyms.c
+++ /dev/null
@@ -1,29 +0,0 @@
-/* 
- * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include "linux/module.h"
-#include "asm/uaccess.h"
-#include "mode.h"
-
-EXPORT_SYMBOL(__do_copy_from_user);
-EXPORT_SYMBOL(__do_copy_to_user);
-EXPORT_SYMBOL(__do_strncpy_from_user);
-EXPORT_SYMBOL(__do_strnlen_user); 
-EXPORT_SYMBOL(__do_clear_user);
-EXPORT_SYMBOL(clear_user_tt);
-
-EXPORT_SYMBOL(tracing_pid);
-EXPORT_SYMBOL(honeypot);
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/tt/mem.c b/arch/um/kernel/tt/mem.c
deleted file mode 100644
index d0c3c4975f2..00000000000
--- a/arch/um/kernel/tt/mem.c
+++ /dev/null
@@ -1,34 +0,0 @@
-/* 
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include "linux/stddef.h"
-#include "linux/mm.h"
-#include "asm/uaccess.h"
-#include "mem_user.h"
-#include "kern_util.h"
-#include "kern.h"
-#include "tt.h"
-
-void before_mem_tt(unsigned long brk_start)
-{
-	if(debug)
-		remap_data(UML_ROUND_DOWN(&_stext), UML_ROUND_UP(&_etext), 1);
-	remap_data(UML_ROUND_DOWN(&_sdata), UML_ROUND_UP(&_edata), 1);
-	remap_data(UML_ROUND_DOWN(&__bss_start), UML_ROUND_UP(&_end), 1);
-}
-
-#define SIZE ((CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS) * 0x20000000)
-#define START (CONFIG_TOP_ADDR - SIZE)
-
-unsigned long set_task_sizes_tt(unsigned long *task_size_out)
-{
-	unsigned long host_task_size;
-
-	/* Round up to the nearest 4M */
-	host_task_size = ROUND_4M((unsigned long) &host_task_size);
-	*task_size_out = START;
-
-	return host_task_size;<