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, 70 deletions

diff --git a/arch/um/kernel/tt/ptproxy/sysdep.c b/arch/um/kernel/tt/ptproxy/sysdep.c
deleted file mode 100644
index e0e1ab0588a..00000000000
--- a/arch/um/kernel/tt/ptproxy/sysdep.c
+++ /dev/null
@@ -1,70 +0,0 @@
-/**********************************************************************
-sysdep.c
-
-Copyright (C) 1999 Lars Brinkhoff.  See the file COPYING for licensing
-terms and conditions.
-**********************************************************************/
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <signal.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <linux/unistd.h>
-#include "ptrace_user.h"
-#include "user.h"
-#include "os.h"
-
-int get_syscall(pid_t pid, long *arg1, long *arg2, long *arg3, long *arg4, 
-		long *arg5)
-{
-	*arg1 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG1_OFFSET, 0);
-	*arg2 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG2_OFFSET, 0);
-	*arg3 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG3_OFFSET, 0);
-	*arg4 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG4_OFFSET, 0);
-	*arg5 = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_ARG5_OFFSET, 0);
-	return(ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_NR_OFFSET, 0));
-}
-
-void syscall_cancel(pid_t pid, int result)
-{
-	if((ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET,
-		   __NR_getpid) < 0) ||
-	   (ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0) ||
-	   (wait_for_stop(pid, SIGTRAP, PTRACE_SYSCALL, NULL) < 0) ||
-	   (ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET, result) < 0) ||
-	   (ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0))
-		printk("ptproxy: couldn't cancel syscall: errno = %d\n", 
-		       errno);
-}
-
-void syscall_set_result(pid_t pid, long result)
-{
-	ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET, result);
-}
-
-void syscall_continue(pid_t pid)
-{
-	ptrace(PTRACE_SYSCALL, pid, 0, 0);
-}
-
-int syscall_pause(pid_t pid) 
-{
-	if(ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET, __NR_pause) < 0){
-		printk("syscall_change - ptrace failed, errno = %d\n", errno);
-		return(-1);
-	}
-	return(0);
-}
-
-/*
- * 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:
- */