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, 85 deletions

diff --git a/arch/um/kernel/tt/ptproxy/wait.c b/arch/um/kernel/tt/ptproxy/wait.c
deleted file mode 100644
index bdd4af4b65fc..000000000000
--- a/arch/um/kernel/tt/ptproxy/wait.c
+++ /dev/null
@@ -1,85 +0,0 @@
-/**********************************************************************
-wait.c
-
-Copyright (C) 1999 Lars Brinkhoff.  See the file COPYING for licensing
-terms and conditions.
-
-**********************************************************************/
-
-#include <errno.h>
-#include <signal.h>
-#include <sys/wait.h>
-
-#include "ptproxy.h"
-#include "sysdep.h"
-#include "wait.h"
-#include "ptrace_user.h"
-#include "sysdep/ptrace.h"
-#include "sysdep/sigcontext.h"
-
-int proxy_wait_return(struct debugger *debugger, pid_t unused)
-{
-        debugger->waiting = 0;
-
-        if(debugger->debugee->died || (debugger->wait_options & __WCLONE)){
-                debugger_cancelled_return(debugger, -ECHILD);
-                return(0);
-        }
-
-        if(debugger->debugee->zombie && debugger->debugee->event)
-                debugger->debugee->died = 1;
-
-        if(debugger->debugee->event){
-                debugger->debugee->event = 0;
-                ptrace(PTRACE_POKEDATA, debugger->pid,
-                       debugger->wait_status_ptr, 
-                       debugger->debugee->wait_status);
-                /* if (wait4)
-                   ptrace (PTRACE_POKEDATA, pid, rusage_ptr, ...); */
-                debugger_cancelled_return(debugger, debugger->debugee->pid);
-                return(0);
-        }
-
-        /* pause will return -EINTR, which happens to be right for wait */
-        debugger_normal_return(debugger, -1);
-        return(0);
-}
-
-int parent_wait_return(struct debugger *debugger, pid_t unused)
-{
-        return(debugger_normal_return(debugger, -1));
-}
-
-int real_wait_return(struct debugger *debugger)
-{
-        unsigned long ip;
-        int pid;
-
-        pid = debugger->pid;
-
-        ip = ptrace(PTRACE_PEEKUSR, pid, PT_IP_OFFSET, 0);
-        IP_RESTART_SYSCALL(ip);
-
-        if(ptrace(PTRACE_POKEUSR, pid, PT_IP_OFFSET, ip) < 0)
-                tracer_panic("real_wait_return : Failed to restart system "
-                             "call, errno = %d\n", errno);
-
-        if((ptrace(PTRACE_SYSCALL, debugger->pid, 0, SIGCHLD) < 0) ||
-           (ptrace(PTRACE_SYSCALL, debugger->pid, 0, 0) < 0) ||
-           (ptrace(PTRACE_SYSCALL, debugger->pid, 0, 0) < 0) ||
-           debugger_normal_return(debugger, -1))
-                tracer_panic("real_wait_return : gdb failed to wait, "
-                             "errno = %d\n", errno);
-        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:
- */