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>

1 files changed, 0 insertions, 37 deletions

diff --git a/arch/um/include/tt/tt.h b/arch/um/include/tt/tt.h
deleted file mode 100644
index acb8356e1f98..000000000000
--- a/arch/um/include/tt/tt.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#ifndef __TT_H__
-#define __TT_H__
-
-#include "sysdep/ptrace.h"
-
-extern int gdb_pid;
-extern int debug;
-extern int debug_stop;
-extern int debug_trace;
-
-extern int honeypot;
-
-extern int fork_tramp(void *sig_stack);
-extern int do_proc_op(void *t, int proc_id);
-extern int tracer(int (*init_proc)(void *), void *sp);
-extern void attach_process(int pid);
-extern void tracer_panic(char *format, ...)
-        __attribute__ ((format (printf, 1, 2)));
-extern void set_init_pid(int pid);
-extern int set_user_mode(void *task);
-extern void set_tracing(void *t, int tracing);
-extern int is_tracing(void *task);
-extern void syscall_handler(int sig, union uml_pt_regs *regs);
-extern void exit_kernel(int pid, void *task);
-extern void do_syscall(void *task, int pid, int local_using_sysemu);
-extern void do_sigtrap(void *task);
-extern int is_valid_pid(int pid);
-extern void remap_data(void *segment_start, void *segment_end, int w);
-extern long execute_syscall_tt(void *r);
-
-#endif
-