m68k: Remove signal translation and exec_domain

As execution domain support is gone we can remove
signal translation from the signal code and remove
exec_domain from thread_info.
Signed-off-by: Richard Weinberger <richard@nod.at>

arch/m68k/include/asm/thread_info.h

@@ -26,7 +26,6 @@
 struct thread_info {
 	struct task_struct	*task;		/* main task structure */
 	unsigned long		flags;
-	struct exec_domain	*exec_domain;	/* execution domain */
 	mm_segment_t		addr_limit;	/* thread address space */
 	int			preempt_count;	/* 0 => preemptable, <0 => BUG */
 	__u32			cpu;		/* should always be 0 on m68k */
@@ -37,7 +36,6 @@ struct thread_info {
 #define INIT_THREAD_INFO(tsk)			\
 {						\
 	.task		= &tsk,			\
-	.exec_domain	= &default_exec_domain,	\
 	.addr_limit	= KERNEL_DS,		\
 	.preempt_count	= INIT_PREEMPT_COUNT,	\
 }

arch/m68k/kernel/signal.c

@@ -863,12 +863,7 @@ static int setup_frame(struct ksignal *ksig, sigset_t *set,
 	if (fsize)
 		err |= copy_to_user (frame + 1, regs + 1, fsize);
 
-	err |= __put_user((current_thread_info()->exec_domain
-			   && current_thread_info()->exec_domain->signal_invmap
-			   && sig < 32
-			   ? current_thread_info()->exec_domain->signal_invmap[sig]
-			   : sig),
-			  &frame->sig);
+	err |= __put_user(sig, &frame->sig);
 
 	err |= __put_user(regs->vector, &frame->code);
 	err |= __put_user(&frame->sc, &frame->psc);
@@ -948,12 +943,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
 	if (fsize)
 		err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize);
 
-	err |= __put_user((current_thread_info()->exec_domain
-			   && current_thread_info()->exec_domain->signal_invmap
-			   && sig < 32
-			   ? current_thread_info()->exec_domain->signal_invmap[sig]
-			   : sig),
-			  &frame->sig);
+	err |= __put_user(sig, &frame->sig);
 	err |= __put_user(&frame->info, &frame->pinfo);
 	err |= __put_user(&frame->uc, &frame->puc);
 	err |= copy_siginfo_to_user(&frame->info, &ksig->info);