xtensa: 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 <[e-mail]>

arch/xtensa/include/asm/thread_info.h

···
 
 struct thread_info {
 	struct task_struct	*task;		/* main task structure */
-	struct exec_domain	*exec_domain;	/* execution domain */
 	unsigned long		flags;		/* low level flags */
 	unsigned long		status;		/* thread-synchronous flags */
 	__u32			cpu;		/* current CPU */
···
 #define INIT_THREAD_INFO(tsk)			\
 {						\
 	.task		= &tsk,			\
-	.exec_domain	= &default_exec_domain,	\
 	.flags		= 0,			\
 	.cpu		= 0,			\
 	.preempt_count	= INIT_PREEMPT_COUNT,	\

arch/xtensa/kernel/signal.c

···
 {
 	struct rt_sigframe *frame;
 	int err = 0, sig = ksig->sig;
-	int signal;
 	unsigned long sp, ra, tp;
 
 	sp = regs->areg[1];
···
 	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) {
 		return -EFAULT;
 	}
-
-	signal = current_thread_info()->exec_domain
-		&& current_thread_info()->exec_domain->signal_invmap
-		&& sig < 32
-		? current_thread_info()->exec_domain->signal_invmap[sig]
-		: sig;
 
 	if (ksig->ka.sa.sa_flags & SA_SIGINFO) {
 		err |= copy_siginfo_to_user(&frame->info, &ksig->info);
···
 	 * Note: PS.CALLINC is set to one by start_thread
 	 */
 	regs->areg[4] = (((unsigned long) ra) & 0x3fffffff) | 0x40000000;
-	regs->areg[6] = (unsigned long) signal;
+	regs->areg[6] = (unsigned long) sig;
 	regs->areg[7] = (unsigned long) &frame->info;
 	regs->areg[8] = (unsigned long) &frame->uc;
 	regs->threadptr = tp;
···
 
 #if DEBUG_SIG
 	printk("SIG rt deliver (%s:%d): signal=%d sp=%p pc=%08x\n",
-		current->comm, current->pid, signal, frame, regs->pc);
+		current->comm, current->pid, sig, frame, regs->pc);
 #endif
 
 	return 0;