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, 19 deletions

diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c
index 7e4305a1fd3c..93df0672d022 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)