1 files changed, 0 insertions, 812 deletions

diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
deleted file mode 100644
index d5e2acef9877..000000000000
--- a/arch/sparc64/kernel/process.c
+++ /dev/null
@@ -1,812 +0,0 @@
-/*  arch/sparc64/kernel/process.c
- *
- *  Copyright (C) 1995, 1996, 2008 David S. Miller (davem@davemloft.net)
- *  Copyright (C) 1996       Eddie C. Dost   (ecd@skynet.be)
- *  Copyright (C) 1997, 1998 Jakub Jelinek   (jj@sunsite.mff.cuni.cz)
- */
-
-/*
- * This file handles the architecture-dependent parts of process handling..
- */
-
-#include <stdarg.h>
-
-#include <linux/errno.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/fs.h>
-#include <linux/smp.h>
-#include <linux/stddef.h>
-#include <linux/ptrace.h>
-#include <linux/slab.h>
-#include <linux/user.h>
-#include <linux/delay.h>
-#include <linux/compat.h>
-#include <linux/tick.h>
-#include <linux/init.h>
-#include <linux/cpu.h>
-#include <linux/elfcore.h>
-#include <linux/sysrq.h>
-
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/page.h>
-#include <asm/pgalloc.h>
-#include <asm/pgtable.h>
-#include <asm/processor.h>
-#include <asm/pstate.h>
-#include <asm/elf.h>
-#include <asm/fpumacro.h>
-#include <asm/head.h>
-#include <asm/cpudata.h>
-#include <asm/mmu_context.h>
-#include <asm/unistd.h>
-#include <asm/hypervisor.h>
-#include <asm/syscalls.h>
-#include <asm/irq_regs.h>
-#include <asm/smp.h>
-
-#include "kstack.h"
-
-static void sparc64_yield(int cpu)
-{
-	if (tlb_type != hypervisor)
-		return;
-
-	clear_thread_flag(TIF_POLLING_NRFLAG);
-	smp_mb__after_clear_bit();
-
-	while (!need_resched() && !cpu_is_offline(cpu)) {
-		unsigned long pstate;
-
-		/* Disable interrupts. */
-		__asm__ __volatile__(
-			"rdpr %%pstate, %0\n\t"
-			"andn %0, %1, %0\n\t"
-			"wrpr %0, %%g0, %%pstate"
-			: "=&r" (pstate)
-			: "i" (PSTATE_IE));
-
-		if (!need_resched() && !cpu_is_offline(cpu))
-			sun4v_cpu_yield();
-
-		/* Re-enable interrupts. */
-		__asm__ __volatile__(
-			"rdpr %%pstate, %0\n\t"
-			"or %0, %1, %0\n\t"
-			"wrpr %0, %%g0, %%pstate"
-			: "=&r" (pstate)
-			: "i" (PSTATE_IE));
-	}
-
-	set_thread_flag(TIF_POLLING_NRFLAG);
-}
-
-/* The idle loop on sparc64. */
-void cpu_idle(void)
-{
-	int cpu = smp_processor_id();
-
-	set_thread_flag(TIF_POLLING_NRFLAG);
-
-	while(1) {
-		tick_nohz_stop_sched_tick(1);
-
-		while (!need_resched() && !cpu_is_offline(cpu))
-			sparc64_yield(cpu);
-
-		tick_nohz_restart_sched_tick();
-
-		preempt_enable_no_resched();
-
-#ifdef CONFIG_HOTPLUG_CPU
-		if (cpu_is_offline(cpu))
-			cpu_play_dead();
-#endif
-
-		schedule();
-		preempt_disable();
-	}
-}
-
-#ifdef CONFIG_COMPAT
-static void show_regwindow32(struct pt_regs *regs)
-{
-	struct reg_window32 __user *rw;
-	struct reg_window32 r_w;
-	mm_segment_t old_fs;
-	
-	__asm__ __volatile__ ("flushw");
-	rw = compat_ptr((unsigned)regs->u_regs[14]);
-	old_fs = get_fs();
-	set_fs (USER_DS);
-	if (copy_from_user (&r_w, rw, sizeof(r_w))) {
-		set_fs (old_fs);
-		return;
-	}
-
-	set_fs (old_fs);			
-	printk("l0: %08x l1: %08x l2: %08x l3: %08x "
-	       "l4: %08x l5: %08x l6: %08x l7: %08x\n",
-	       r_w.locals[0], r_w.locals[1], r_w.locals[2], r_w.locals[3],
-	       r_w.locals[4], r_w.locals[5], r_w.locals[6], r_w.locals[7]);
-	printk("i0: %08x i1: %08x i2: %08x i3: %08x "
-	       "i4: %08x i5: %08x i6: %08x i7: %08x\n",
-	       r_w.ins[0], r_w.ins[1], r_w.ins[2], r_w.ins[3],
-	       r_w.ins[4], r_w.ins[5], r_w.ins[6], r_w.ins[7]);
-}
-#else
-#define show_regwindow32(regs)	do { } while (0)
-#endif
-
-static void show_regwindow(struct pt_regs *regs)
-{
-	struct reg_window __user *rw;
-	struct reg_window *rwk;
-	struct reg_window r_w;
-	mm_segment_t old_fs;
-
-	if ((regs->tstate & TSTATE_PRIV) || !(test_thread_flag(TIF_32BIT))) {
-		__asm__ __volatile__ ("flushw");
-		rw = (struct reg_window __user *)
-			(regs->u_regs[14] + STACK_BIAS);
-		rwk = (struct reg_window *)
-			(regs->u_regs[14] + STACK_BIAS);
-		if (!(regs->tstate & TSTATE_PRIV)) {
-			old_fs = get_fs();
-			set_fs (USER_DS);
-			if (copy_from_user (&r_w, rw, sizeof(r_w))) {
-				set_fs (old_fs);
-				return;
-			}
-			rwk = &r_w;
-			set_fs (old_fs);			
-		}
-	} else {
-		show_regwindow32(regs);
-		return;
-	}
-	printk("l0: %016lx l1: %016lx l2: %016lx l3: %016lx\n",
-	       rwk->locals[0], rwk->locals[1], rwk->locals[2], rwk->locals[3]);
-	printk("l4: %016lx l5: %016lx l6: %016lx l7: %016lx\n",
-	       rwk->locals[4], rwk->locals[5], rwk->locals[6], rwk->locals[7]);
-	printk("i0: %016lx i1: %016lx i2: %016lx i3: %016lx\n",
-	       rwk->ins[0], rwk->ins[1], rwk->ins[2], rwk->ins[3]);
-	printk("i4: %016lx i5: %016lx i6: %016lx i7: %016lx\n",
-	       rwk->ins[4], rwk->ins[5], rwk->ins[6], rwk->ins[7]);
-	if (regs->tstate & TSTATE_PRIV)
-		printk("I7: <%pS>\n", (void *) rwk->ins[7]);
-}
-
-void show_regs(struct pt_regs *regs)
-{
-	printk("TSTATE: %016lx TPC: %016lx TNPC: %016lx Y: %08x    %s\n", regs->tstate,
-	       regs->tpc, regs->tnpc, regs->y, print_tainted());
-	printk("TPC: <%pS>\n", (void *) regs->tpc);
-	printk("g0: %016lx g1: %016lx g2: %016lx g3: %016lx\n",
-	       regs->u_regs[0], regs->u_regs[1], regs->u_regs[2],
-	       regs->u_regs[3]);
-	printk("g4: %016lx g5: %016lx g6: %016lx g7: %016lx\n",
-	       regs->u_regs[4], regs->u_regs[5], regs->u_regs[6],
-	       regs->u_regs[7]);
-	printk("o0: %016lx o1: %016lx o2: %016lx o3: %016lx\n",
-	       regs->u_regs[8], regs->u_regs[9], regs->u_regs[10],
-	       regs->u_regs[11]);
-	printk("o4: %016lx o5: %016lx sp: %016lx ret_pc: %016lx\n",
-	       regs->u_regs[12], regs->u_regs[13], regs->u_regs[14],
-	       regs->u_regs[15]);
-	printk("RPC: <%pS>\n", (void *) regs->u_regs[15]);
-	show_regwindow(regs);
-}
-
-struct global_reg_snapshot global_reg_snapshot[NR_CPUS];
-static DEFINE_SPINLOCK(global_reg_snapshot_lock);
-
-static void __global_reg_self(struct thread_info *tp, struct pt_regs *regs,
-			      int this_cpu)
-{
-	flushw_all();
-
-	global_reg_snapshot[this_cpu].tstate = regs->tstate;
-	global_reg_snapshot[this_cpu].tpc = regs->tpc;
-	global_reg_snapshot[this_cpu].tnpc = regs->tnpc;
-	global_reg_snapshot[this_cpu].o7 = regs->u_regs[UREG_I7];
-
-	if (regs->tstate & TSTATE_PRIV) {
-		struct reg_window *rw;
-
-		rw = (struct reg_window *)
-			(regs->u_regs[UREG_FP] + STACK_BIAS);
-		if (kstack_valid(tp, (unsigned long) rw)) {
-			global_reg_snapshot[this_cpu].i7 = rw->ins[7];
-			rw = (struct reg_window *)
-				(rw->ins[6] + STACK_BIAS);
-			if (kstack_valid(tp, (unsigned long) rw))
-				global_reg_snapshot[this_cpu].rpc = rw->ins[7];
-		}
-	} else {
-		global_reg_snapshot[this_cpu].i7 = 0;
-		global_reg_snapshot[this_cpu].rpc = 0;
-	}
-	global_reg_snapshot[this_cpu].thread = tp;
-}
-
-/* In order to avoid hangs we do not try to synchronize with the
- * global register dump client cpus.  The last store they make is to
- * the thread pointer, so do a short poll waiting for that to become
- * non-NULL.
- */
-static void __global_reg_poll(struct global_reg_snapshot *gp)
-{
-	int limit = 0;
-
-	while (!gp->thread && ++limit < 100) {
-		barrier();
-		udelay(1);
-	}
-}
-
-void __trigger_all_cpu_backtrace(void)
-{
-	struct thread_info *tp = current_thread_info();
-	struct pt_regs *regs = get_irq_regs();
-	unsigned long flags;
-	int this_cpu, cpu;
-
-	if (!regs)
-		regs = tp->kregs;
-
-	spin_lock_irqsave(&global_reg_snapshot_lock, flags);
-
-	memset(global_reg_snapshot, 0, sizeof(global_reg_snapshot));
-
-	this_cpu = raw_smp_processor_id();
-
-	__global_reg_self(tp, regs, this_cpu);
-
-	smp_fetch_global_regs();
-
-	for_each_online_cpu(cpu) {
-		struct global_reg_snapshot *gp = &global_reg_snapshot[cpu];
-
-		__global_reg_poll(gp);
-
-		tp = gp->thread;
-		printk("%c CPU[%3d]: TSTATE[%016lx] TPC[%016lx] TNPC[%016lx] TASK[%s:%d]\n",
-		       (cpu == this_cpu ? '*' : ' '), cpu,
-		       gp->tstate, gp->tpc, gp->tnpc,
-		       ((tp && tp->task) ? tp->task->comm : "NULL"),
-		       ((tp && tp->task) ? tp->task->pid : -1));
-
-		if (gp->tstate & TSTATE_PRIV) {
-			printk("             TPC[%pS] O7[%pS] I7[%pS] RPC[%pS]\n",
-			       (void *) gp->tpc,
-			       (void *) gp->o7,
-			       (void *) gp->i7,
-			       (void *) gp->rpc);
-		} else {
-			printk("             TPC[%lx] O7[%lx] I7[%lx] RPC[%lx]\n",
-			       gp->tpc, gp->o7, gp->i7, gp->rpc);
-		}
-	}
-
-	memset(global_reg_snapshot, 0, sizeof(global_reg_snapshot));
-
-	spin_unlock_irqrestore(&global_reg_snapshot_lock, flags);
-}
-
-#ifdef CONFIG_MAGIC_SYSRQ
-
-static void sysrq_handle_globreg(int key, struct tty_struct *tty)
-{
-	__trigger_all_cpu_backtrace();
-}
-
-static struct sysrq_key_op sparc_globalreg_op = {
-	.handler	= sysrq_handle_globreg,
-	.help_msg	= "Globalregs",
-	.action_msg	= "Show Global CPU Regs",
-};
-
-static int __init sparc_globreg_init(void)
-{
-	return register_sysrq_key('y', &sparc_globalreg_op);
-}
-
-core_initcall(sparc_globreg_init);
-
-#endif
-
-unsigned long thread_saved_pc(struct task_struct *tsk)
-{
-	struct thread_info *ti = task_thread_info(tsk);
-	unsigned long ret = 0xdeadbeefUL;
-	
-	if (ti && ti->ksp) {
-		unsigned long *sp;
-		sp = (unsigned long *)(ti->ksp + STACK_BIAS);
-		if (((unsigned long)sp & (sizeof(long) - 1)) == 0UL &&
-		    sp[14]) {
-			unsigned long *fp;
-			fp = (unsigned long *)(sp[14] + STACK_BIAS);
-			if (((unsigned long)fp & (sizeof(long) - 1)) == 0UL)
-				ret = fp[15];
-		}
-	}
-	return ret;
-}
-
-/* Free current thread data structures etc.. */
-void exit_thread(void)
-{
-	struct thread_info *t = current_thread_info();
-
-	if (t->utraps) {
-		if (t->utraps[0] < 2)
-			kfree (t->utraps);
-		else
-			t->utraps[0]--;
-	}
-
-	if (test_and_clear_thread_flag(TIF_PERFCTR)) {
-		t->user_cntd0 = t->user_cntd1 = NULL;
-		t->pcr_reg = 0;
-		write_pcr(0);
-	}
-}
-
-void flush_thread(void)
-{
-	struct thread_info *t = current_thread_info();
-	struct mm_struct *mm;
-
-	if (test_ti_thread_flag(t, TIF_ABI_PENDING)) {
-		clear_ti_thread_flag(t, TIF_ABI_PENDING);
-		if (test_ti_thread_flag(t, TIF_32BIT))
-			clear_ti_thread_flag(t, TIF_32BIT);
-		else
-			set_ti_thread_flag(t, TIF_32BIT);
-	}
-
-	mm = t->task->mm;
-	if (mm)
-		tsb_context_switch(mm);
-
-	set_thread_wsaved(0);
-
-	/* Turn off performance counters if on. */
-	if (test_and_clear_thread_flag(TIF_PERFCTR)) {
-		t->user_cntd0 = t->user_cntd1 = NULL;
-		t->pcr_reg = 0;
-		write_pcr(0);
-	}
-
-	/* Clear FPU register state. */
-	t->fpsaved[0] = 0;
-	
-	if (get_thread_current_ds() != ASI_AIUS)
-		set_fs(USER_DS);
-}
-
-/* It's a bit more tricky when 64-bit tasks are involved... */
-static unsigned long clone_stackframe(unsigned long csp, unsigned long psp)
-{
-	unsigned long fp, distance, rval;
-
-	if (!(test_thread_flag(TIF_32BIT))) {
-		csp += STACK_BIAS;
-		psp += STACK_BIAS;
-		__get_user(fp, &(((struct reg_window __user *)psp)->ins[6]));
-		fp += STACK_BIAS;
-	} else
-		__get_user(fp, &(((struct reg_window32 __user *)psp)->ins[6]));
-
-	/* Now 8-byte align the stack as this is mandatory in the
-	 * Sparc ABI due to how register windows work.  This hides
-	 * the restriction from thread libraries etc.  -DaveM
-	 */
-	csp &= ~7UL;
-
-	distance = fp - psp;
-	rval = (csp - distance);
-	if (copy_in_user((void __user *) rval, (void __user *) psp, distance))
-		rval = 0;
-	else if (test_thread_flag(TIF_32BIT)) {
-		if (put_user(((u32)csp),
-			     &(((struct reg_window32 __user *)rval)->ins[6])))
-			rval = 0;
-	} else {
-		if (put_user(((u64)csp - STACK_BIAS),
-			     &(((struct reg_window __user *)rval)->ins[6])))
-			rval = 0;
-		else
-			rval = rval - STACK_BIAS;
-	}
-
-	return rval;
-}
-
-/* Standard stuff. */
-static inline void shift_window_buffer(int first_win, int last_win,
-				       struct thread_info *t)
-{
-	int i;
-
-	for (i = first_win; i < last_win; i++) {
-		t->rwbuf_stkptrs[i] = t->rwbuf_stkptrs[i+1];
-		memcpy(&t->reg_window[i], &t->reg_window[i+1],
-		       sizeof(struct reg_window));
-	}
-}
-
-void synchronize_user_stack(void)
-{
-	struct thread_info *t = current_thread_info();
-	unsigned long window;
-
-	flush_user_windows();
-	if ((window = get_thread_wsaved()) != 0) {
-		int winsize = sizeof(struct reg_window);
-		int bias = 0;
-
-		if (test_thread_flag(TIF_32BIT))
-			winsize = sizeof(struct reg_window32);
-		else
-			bias = STACK_BIAS;
-
-		window -= 1;
-		do {
-			unsigned long sp = (t->rwbuf_stkptrs[window] + bias);
-			struct reg_window *rwin = &t->reg_window[window];
-
-			if (!copy_to_user((char __user *)sp, rwin, winsize)) {
-				shift_window_buffer(window, get_thread_wsaved() - 1, t);
-				set_thread_wsaved(get_thread_wsaved() - 1);
-			}
-		} while (window--);
-	}
-}
-
-static void stack_unaligned(unsigned long sp)
-{
-	siginfo_t info;
-
-	info.si_signo = SIGBUS;
-	info.si_errno = 0;
-	info.si_code = BUS_ADRALN;
-	info.si_addr = (void __user *) sp;
-	info.si_trapno = 0;
-	force_sig_info(SIGBUS, &info, current);
-}
-
-void fault_in_user_windows(void)
-{
-	struct thread_info *t = current_thread_info();
-	unsigned long window;
-	int winsize = sizeof(struct reg_window);
-	int bias = 0;
-
-	if (test_thread_flag(TIF_32BIT))
-		winsize = sizeof(struct reg_window32);
-	else
-		bias = STACK_BIAS;
-
-	flush_user_windows();
-	window = get_thread_wsaved();
-
-	if (likely(window != 0)) {
-		window -= 1;
-		do {
-			unsigned long sp = (t->rwbuf_stkptrs[window] + bias);
-			struct reg_window *rwin = &t->reg_window[window];
-
-			if (unlikely(sp & 0x7UL))
-				stack_unaligned(sp);
-
-			if (unlikely(copy_to_user((char __user *)sp,
-						  rwin, winsize)))
-				goto barf;
-		} while (window--);
-	}
-	set_thread_wsaved(0);
-	return;
-
-barf:
-	set_thread_wsaved(window + 1);
-	do_exit(SIGILL);
-}
-
-asmlinkage long sparc_do_fork(unsigned long clone_flags,
-			      unsigned long stack_start,
-			      struct pt_regs *regs,
-			      unsigned long stack_size)
-{
-	int __user *parent_tid_ptr, *child_tid_ptr;
-	unsigned long orig_i1 = regs->u_regs[UREG_I1];
-	long ret;
-
-#ifdef CONFIG_COMPAT
-	if (test_thread_flag(TIF_32BIT)) {
-		parent_tid_ptr = compat_ptr(regs->u_regs[UREG_I2]);
-		child_tid_ptr = compat_ptr(regs->u_regs[UREG_I4]);
-	} else
-#endif
-	{
-		parent_tid_ptr = (int __user *) regs->u_regs[UREG_I2];
-		child_tid_ptr = (int __user *) regs->u_regs[UREG_I4];
-	}
-
-	ret = do_fork(clone_flags, stack_start,
-		      regs, stack_size,
-		      parent_tid_ptr, child_tid_ptr);
-
-	/* If we get an error and potentially restart the system
-	 * call, we're screwed because copy_thread() clobbered
-	 * the parent's %o1.  So detect that case and restore it
-	 * here.
-	 */
-	if ((unsigned long)ret >= -ERESTART_RESTARTBLOCK)
-		regs->u_regs[UREG_I1] = orig_i1;
-
-	return ret;
-}
-
-/* Copy a Sparc thread.  The fork() return value conventions
- * under SunOS are nothing short of bletcherous:
- * Parent -->  %o0 == childs  pid, %o1 == 0
- * Child  -->  %o0 == parents pid, %o1 == 1
- */
-int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
-		unsigned long unused,
-		struct task_struct *p, struct pt_regs *regs)
-{
-	struct thread_info *t = task_thread_info(p);
-	struct sparc_stackf *parent_sf;
-	unsigned long child_stack_sz;
-	char *child_trap_frame;
-	int kernel_thread;
-
-	kernel_thread = (regs->tstate & TSTATE_PRIV) ? 1 : 0;
-	parent_sf = ((struct sparc_stackf *) regs) - 1;
-
-	/* Calculate offset to stack_frame & pt_regs */
-	child_stack_sz = ((STACKFRAME_SZ + TRACEREG_SZ) +
-			  (kernel_thread ? STACKFRAME_SZ : 0));
-	child_trap_frame = (task_stack_page(p) +
-			    (THREAD_SIZE - child_stack_sz));
-	memcpy(child_trap_frame, parent_sf, child_stack_sz);
-
-	t->flags = (t->flags & ~((0xffUL << TI_FLAG_CWP_SHIFT) |
-				 (0xffUL << TI_FLAG_CURRENT_DS_SHIFT))) |
-		(((regs->tstate + 1) & TSTATE_CWP) << TI_FLAG_CWP_SHIFT);
-	t->new_child = 1;
-	t->ksp = ((unsigned long) child_trap_frame) - STACK_BIAS;
-	t->kregs = (struct pt_regs *) (child_trap_frame +
-				       sizeof(struct sparc_stackf));
-	t->fpsaved[0] = 0;
-
-	if (kernel_thread) {
-		struct sparc_stackf *child_sf = (struct sparc_stackf *)
-			(child_trap_frame + (STACKFRAME_SZ + TRACEREG_SZ));
-
-		/* Zero terminate the stack backtrace.  */
-		child_sf->fp = NULL;
-		t->kregs->u_regs[UREG_FP] =
-		  ((unsigned long) child_sf) - STACK_BIAS;
-
-		/* Special case, if we are spawning a kernel thread from
-		 * a userspace task (usermode helper, NFS or similar), we
-		 * must disable performance counters in the child because
-		 * the address space and protection realm are changing.
-		 */
-		if (t->flags & _TIF_PERFCTR) {
-			t->user_cntd0 = t->user_cntd1 = NULL;
-			t->pcr_reg = 0;
-			t->flags &= ~_TIF_PERFCTR;
-		}
-		t->flags |= ((long)ASI_P << TI_FLAG_CURRENT_DS_SHIFT);
-		t->kregs->u_regs[UREG_G6] = (unsigned long) t;
-		t->kregs->u_regs[UREG_G4] = (unsigned long) t->task;
-	} else {
-		if (t->flags & _TIF_32BIT) {
-			sp &= 0x00000000ffffffffUL;
-			regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
-		}
-		t->kregs->u_regs[UREG_FP] = sp;
-		t->flags |= ((long)ASI_AIUS << TI_FLAG_CURRENT_DS_SHIFT);
-		if (sp != regs->u_regs[UREG_FP]) {
-			unsigned long csp;
-
-			csp = clone_stackframe(sp, regs->u_regs[UREG_FP]);
-			if (!csp)
-				return -EFAULT;
-			t->kregs->u_regs[UREG_FP] = csp;
-		}
-		if (t->utraps)
-			t->utraps[0]++;
-	}
-
-	/* Set the return value for the child. */
-	t->kregs->u_regs[UREG_I0] = current->pid;
-	t->kregs->u_regs[UREG_I1] = 1;
-
-	/* Set the second return value for the parent. */
-	regs->u_regs[UREG_I1] = 0;
-
-	if (clone_flags & CLONE_SETTLS)
-		t->kregs->u_regs[UREG_G7] = regs->u_regs[UREG_I3];
-
-	return 0;
-}
-
-/*
- * This is the mechanism for creating a new kernel thread.
- *
- * NOTE! Only a kernel-only process(ie the swapper or direct descendants
- * who haven't done an "execve()") should use this: it will work within
- * a system call from a "real" process, but the process memory space will
- * not be freed until both the parent and the child have exited.
- */
-pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
-{
-	long retval;
-
-	/* If the parent runs before fn(arg) is called by the child,
-	 * the input registers of this function can be clobbered.
-	 * So we stash 'fn' and 'arg' into global registers which
-	 * will not be modified by the parent.
-	 */
-	__asm__ __volatile__("mov %4, %%g2\n\t"	   /* Save FN into global */
-			     "mov %5, %%g3\n\t"	   /* Save ARG into global */
-			     "mov %1, %%g1\n\t"	   /* Clone syscall nr. */
-			     "mov %2, %%o0\n\t"	   /* Clone flags. */
-			     "mov 0, %%o1\n\t"	   /* usp arg == 0 */
-			     "t 0x6d\n\t"	   /* Linux/Sparc clone(). */
-			     "brz,a,pn %%o1, 1f\n\t" /* Parent, just return. */
-			     " mov %%o0, %0\n\t"
-			     "jmpl %%g2, %%o7\n\t"   /* Call the function. */
-			     " mov %%g3, %%o0\n\t"   /* Set arg in delay. */
-			     "mov %3, %%g1\n\t"
-			     "t 0x6d\n\t"	   /* Linux/Sparc exit(). */
-			     /* Notreached by child. */
-			     "1:" :
-			     "=r" (retval) :
-			     "i" (__NR_clone), "r" (flags | CLONE_VM | CLONE_UNTRACED),
-			     "i" (__NR_exit),  "r" (fn), "r" (arg) :
-			     "g1", "g2", "g3", "o0", "o1", "memory", "cc");
-	return retval;
-}
-
-typedef struct {
-	union {
-		unsigned int	pr_regs[32];
-		unsigned long	pr_dregs[16];
-	} pr_fr;
-	unsigned int __unused;
-	unsigned int	pr_fsr;
-	unsigned char	pr_qcnt;
-	unsigned char	pr_q_entrysize;
-	unsigned char	pr_en;
-	unsigned int	pr_q[64];
-} elf_fpregset_t32;
-
-/*
- * fill in the fpu structure for a core dump.
- */
-int dump_fpu (struct pt_regs * regs, elf_fpregset_t * fpregs)
-{
-	unsigned long *kfpregs = current_thread_info()->fpregs;
-	unsigned long fprs = current_thread_info()->fpsaved[0];
-
-	if (test_thread_flag(TIF_32BIT)) {
-		elf_fpregset_t32 *fpregs32 = (elf_fpregset_t32 *)fpregs;
-
-		if (fprs & FPRS_DL)
-			memcpy(&fpregs32->pr_fr.pr_regs[0], kfpregs,
-			       sizeof(unsigned int) * 32);
-		else
-			memset(&fpregs32->pr_fr.pr_regs[0], 0,
-			       sizeof(unsigned int) * 32);
-		fpregs32->pr_qcnt = 0;
-		fpregs32->pr_q_entrysize = 8;
-		memset(&fpregs32->pr_q[0], 0,
-		       (sizeof(unsigned int) * 64));
-		if (fprs & FPRS_FEF) {
-			fpregs32->pr_fsr = (unsigned int) current_thread_info()->xfsr[0];
-			fpregs32->pr_en = 1;
-		} else {
-			fpregs32->pr_fsr = 0;
-			fpregs32->pr_en = 0;
-		}
-	} else {
-		if(fprs & FPRS_DL)
-			memcpy(&fpregs->pr_regs[0], kfpregs,
-			       sizeof(unsigned int) * 32);
-		else
-			memset(&fpregs->pr_regs[0], 0,
-			       sizeof(unsigned int) * 32);
-		if(fprs & FPRS_DU)
-			memcpy(&fpregs->pr_regs[16], kfpregs+16,
-			       sizeof(unsigned int) * 32);
-		else
-			memset(&fpregs->pr_regs[16], 0,
-			       sizeof(unsigned int) * 32);
-		if(fprs & FPRS_FEF) {
-			fpregs->pr_fsr = current_thread_info()->xfsr[0];
-			fpregs->pr_gsr = current_thread_info()->gsr[0];
-		} else {
-			fpregs->pr_fsr = fpregs->pr_gsr = 0;
-		}
-		fpregs->pr_fprs = fprs;
-	}
-	return 1;
-}
-
-/*
- * sparc_execve() executes a new program after the asm stub has set
- * things up for us.  This should basically do what I want it to.
- */
-asmlinkage int sparc_execve(struct pt_regs *regs)
-{
-	int error, base = 0;
-	char *filename;
-
-	/* User register window flush is done by entry.S */
-
-	/* Check for indirect call. */
-	if (regs->u_regs[UREG_G1] == 0)
-		base = 1;
-
-	filename = getname((char __user *)regs->u_regs[base + UREG_I0]);
-	error = PTR_ERR(filename);
-	if (IS_ERR(filename))
-		goto out;
-	error = do_execve(filename,
-			  (char __user * __user *)
-			  regs->u_regs[base + UREG_I1],
-			  (char __user * __user *)
-			  regs->u_regs[base + UREG_I2], regs);
-	putname(filename);
-	if (!error) {
-		fprs_write(0);
-		current_thread_info()->xfsr[0] = 0;
-		current_thread_info()->fpsaved[0] = 0;
-		regs->tstate &= ~TSTATE_PEF;
-	}
-out:
-	return error;
-}
-
-unsigned long get_wchan(struct task_struct *task)
-{
-	unsigned long pc, fp, bias = 0;
-	struct thread_info *tp;
-	struct reg_window *rw;
-        unsigned long ret = 0;
-	int count = 0; 
-
-	if (!task || task == current ||
-            task->state == TASK_RUNNING)
-		goto out;
-
-	tp = task_thread_info(task);
-	bias = STACK_BIAS;
-	fp = task_thread_info(task)->ksp + bias;
-
-	do {
-		if (!kstack_valid(tp, fp))
-			break;
-		rw = (struct reg_window *) fp;
-		pc = rw->ins[7];
-		if (!in_sched_functions(pc)) {
-			ret = pc;
-			goto out;
-		}
-		fp = rw->ins[6] + bias;
-	} while (++count < 16);
-
-out:
-	return ret;
-}