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uml: throw out CONFIG_MODE_TT

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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>
This commit is contained in:
Jeff Dike
2007-10-16 01:26:50 -07:00
committed by Linus Torvalds
parent a1ff5878d2
commit 42fda66387
87 changed files with 34 additions and 4203 deletions
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24
arch/um/kernel/irq.c
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@ -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