Merge bits from entry-rewrite tree:

  * Whitespace cleanups in entry.S
  * Pass in pt_regs by reference, not by fake value, to some entry points.
  * Don't export wrusp.

arch/alpha/kernel/alpha_ksyms.c

@@ -144,7 +144,6 @@ EXPORT_SYMBOL(pci_dac_dma_to_offset);
 EXPORT_SYMBOL(dump_thread);
 EXPORT_SYMBOL(dump_fpu);
 EXPORT_SYMBOL(hwrpb);
-EXPORT_SYMBOL(wrusp);
 EXPORT_SYMBOL(start_thread);
 EXPORT_SYMBOL(alpha_read_fp_reg);
 EXPORT_SYMBOL(alpha_read_fp_reg_s);

arch/alpha/kernel/irq_alpha.c

@@ -37,14 +37,13 @@ void (*perf_irq)(unsigned long, struct pt_regs *) = dummy_perf;
  */
 
 asmlinkage void 
-do_entInt(unsigned long type, unsigned long vector, unsigned long la_ptr,
-	  unsigned long a3, unsigned long a4, unsigned long a5,
-	  struct pt_regs regs)
+do_entInt(unsigned long type, unsigned long vector,
+	  unsigned long la_ptr, struct pt_regs *regs)
 {
 	switch (type) {
 	case 0:
 #ifdef CONFIG_SMP
-		handle_ipi(&regs);
+		handle_ipi(regs);
 		return;
 #else
 		irq_err_count++;
@@ -56,32 +55,32 @@ do_entInt(unsigned long type, unsigned long vector, unsigned long la_ptr,
 #ifdef CONFIG_SMP
 	  {
 		long cpu;
-		smp_percpu_timer_interrupt(&regs);
+		smp_percpu_timer_interrupt(regs);
 		cpu = smp_processor_id();
 		if (cpu != boot_cpuid) {
 		        kstat_cpu(cpu).irqs[RTC_IRQ]++;
 		} else {
-			handle_irq(RTC_IRQ, &regs);
+			handle_irq(RTC_IRQ, regs);
 		}
 	  }
 #else
-		handle_irq(RTC_IRQ, &regs);
+		handle_irq(RTC_IRQ, regs);
 #endif
 		return;
 	case 2:
-		alpha_mv.machine_check(vector, la_ptr, &regs);
+		alpha_mv.machine_check(vector, la_ptr, regs);
 		return;
 	case 3:
-		alpha_mv.device_interrupt(vector, &regs);
+		alpha_mv.device_interrupt(vector, regs);
 		return;
 	case 4:
-		perf_irq(vector, &regs);
+		perf_irq(vector, regs);
 		return;
 	default:
 		printk(KERN_CRIT "Hardware intr %ld %lx? Huh?\n",
 		       type, vector);
 	}
-	printk("PC = %016lx PS=%04lx\n", regs.pc, regs.ps);
+	printk(KERN_CRIT "PC = %016lx PS=%04lx\n", regs->pc, regs->ps);
 }
 
 void __init
@@ -96,10 +95,8 @@ common_init_isa_dma(void)
 void __init
 init_IRQ(void)
 {
-	/* Uh, this really MUST come first, just in case
-	 * the platform init_irq() causes interrupts/mchecks
-	 * (as is the case with RAWHIDE, at least).
-	 */
+	/* Just in case the platform init_irq() causes interrupts/mchecks
+	   (as is the case with RAWHIDE, at least).  */
 	wrent(entInt, 0);
 
 	alpha_mv.init_irq();

arch/alpha/kernel/process.c

@@ -229,7 +229,7 @@ flush_thread(void)
 	wrfpcr(FPCR_DYN_NORMAL | ieee_swcr_to_fpcr(0));
 
 	/* Clean slate for TLS.  */
-	current->pcb.unique = 0;
+	current_thread_info()->pcb.unique = 0;
 }
 
 void
@@ -247,16 +247,15 @@ release_thread(struct task_struct *dead_task)
  * with parameters (SIGCHLD, 0).
  */
 int
-alpha_clone(unsigned long clone_flags, unsigned long usp,
-	    int *user_tid, struct switch_stack * swstack)
+alpha_clone(unsigned long clone_flags, unsigned long usp, int *user_tid,
+	    struct pt_regs *regs)
 {
 	struct task_struct *p;
-	struct pt_regs *u_regs = (struct pt_regs *) (swstack+1);
 
 	if (!usp)
 		usp = rdusp();
 
-	p = do_fork(clone_flags & ~CLONE_IDLETASK, usp, u_regs, 0, user_tid);
+	p = do_fork(clone_flags & ~CLONE_IDLETASK, usp, regs, 0, user_tid);
 	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 
@@ -285,7 +284,6 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
 	    unsigned long unused,
 	    struct task_struct * p, struct pt_regs * regs)
 {
-	extern void ret_from_sys_call(void);
 	extern void ret_from_fork(void);
 
 	struct thread_info *childti = p->thread_info;
@@ -307,11 +305,7 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
 	stack = ((struct switch_stack *) regs) - 1;
 	childstack = ((struct switch_stack *) childregs) - 1;
 	*childstack = *stack;
-#ifdef CONFIG_SMP
 	childstack->r26 = (unsigned long) ret_from_fork;
-#else
-	childstack->r26 = (unsigned long) ret_from_sys_call;
-#endif
 	childti->pcb.usp = usp;
 	childti->pcb.ksp = (unsigned long) childstack;
 	childti->pcb.flags = 1;	/* set FEN, clear everything else */

arch/alpha/kernel/traps.c

@@ -210,8 +210,7 @@ long alpha_fp_emul (unsigned long pc);
 
 asmlinkage void
 do_entArith(unsigned long summary, unsigned long write_mask,
-	    unsigned long a2, unsigned long a3, unsigned long a4,
-	    unsigned long a5, struct pt_regs regs)
+	    struct pt_regs *regs)
 {
 	long si_code = FPE_FLTINV;
 	siginfo_t info;
@@ -221,23 +220,21 @@ do_entArith(unsigned long summary, unsigned long write_mask,
 		   emulate the instruction.  If the processor supports
 		   precise exceptions, we don't have to search.  */
 		if (!amask(AMASK_PRECISE_TRAP))
-			si_code = alpha_fp_emul(regs.pc - 4);
+			si_code = alpha_fp_emul(regs->pc - 4);
 		else
-			si_code = alpha_fp_emul_imprecise(&regs, write_mask);
+			si_code = alpha_fp_emul_imprecise(regs, write_mask);
 	}
-	die_if_kernel("Arithmetic fault", &regs, 0, 0);
+	die_if_kernel("Arithmetic fault", regs, 0, 0);
 
 	info.si_signo = SIGFPE;
 	info.si_errno = 0;
 	info.si_code = si_code;
-	info.si_addr = (void *) regs.pc;
+	info.si_addr = (void *) regs->pc;
 	send_sig_info(SIGFPE, &info, current);
 }
 
 asmlinkage void
-do_entIF(unsigned long type, unsigned long a1,
-	 unsigned long a2, unsigned long a3, unsigned long a4,
-	 unsigned long a5, struct pt_regs regs)
+do_entIF(unsigned long type, struct pt_regs *regs)
 {
 	siginfo_t info;
 	int signo, code;
@@ -245,13 +242,13 @@ do_entIF(unsigned long type, unsigned long a1,
 	if (!opDEC_testing || type != 4) {
 		if (type == 1) {
 			const unsigned int *data
-			  = (const unsigned int *) regs.pc;
+			  = (const unsigned int *) regs->pc;
 			printk("Kernel bug at %s:%d\n",
 			       (const char *)(data[1] | (long)data[2] << 32), 
 			       data[0]);
 		}
 		die_if_kernel((type == 1 ? "Kernel Bug" : "Instruction fault"),
-		      &regs, type, 0);
+			      regs, type, 0);
 	}
 
 	switch (type) {
@@ -260,10 +257,10 @@ do_entIF(unsigned long type, unsigned long a1,
 		info.si_errno = 0;
 		info.si_code = TRAP_BRKPT;
 		info.si_trapno = 0;
-		info.si_addr = (void *) regs.pc;
+		info.si_addr = (void *) regs->pc;
 
 		if (ptrace_cancel_bpt(current)) {
-			regs.pc -= 4;	/* make pc point to former bpt */
+			regs->pc -= 4;	/* make pc point to former bpt */
 		}
 
 		send_sig_info(SIGTRAP, &info, current);
@@ -273,15 +270,15 @@ do_entIF(unsigned long type, unsigned long a1,
 		info.si_signo = SIGTRAP;
 		info.si_errno = 0;
 		info.si_code = __SI_FAULT;
-		info.si_addr = (void *) regs.pc;
+		info.si_addr = (void *) regs->pc;
 		info.si_trapno = 0;
 		send_sig_info(SIGTRAP, &info, current);
 		return;
 		
 	      case 2: /* gentrap */
-		info.si_addr = (void *) regs.pc;
-		info.si_trapno = regs.r16;
-		switch ((long) regs.r16) {
+		info.si_addr = (void *) regs->pc;
+		info.si_trapno = regs->r16;
+		switch ((long) regs->r16) {
 		case GEN_INTOVF:
 			signo = SIGFPE;
 			code = FPE_INTOVF;
@@ -341,7 +338,7 @@ do_entIF(unsigned long type, unsigned long a1,
 		info.si_signo = signo;
 		info.si_errno = 0;
 		info.si_code = code;
-		info.si_addr = (void *) regs.pc;
+		info.si_addr = (void *) regs->pc;
 		send_sig_info(signo, &info, current);
 		return;
 
@@ -358,26 +355,26 @@ do_entIF(unsigned long type, unsigned long a1,
 			   we get the correct PC.  If not, we set a flag
 			   to correct it every time through.  */
 			if (opDEC_testing) {
-				if (regs.pc == opDEC_test_pc) {
+				if (regs->pc == opDEC_test_pc) {
 					opDEC_fix = 4;
-					regs.pc += 4;
+					regs->pc += 4;
 					printk("opDEC fixup enabled.\n");
 				}
 				return;
 			}
-			regs.pc += opDEC_fix; 
+			regs->pc += opDEC_fix; 
 			
 			/* EV4 does not implement anything except normal
 			   rounding.  Everything else will come here as
 			   an illegal instruction.  Emulate them.  */
-			si_code = alpha_fp_emul(regs.pc - 4);
+			si_code = alpha_fp_emul(regs->pc - 4);
 			if (si_code == 0)
 				return;
 			if (si_code > 0) {
 				info.si_signo = SIGFPE;
 				info.si_errno = 0;
 				info.si_code = si_code;
-				info.si_addr = (void *) regs.pc;
+				info.si_addr = (void *) regs->pc;
 				send_sig_info(SIGFPE, &info, current);
 				return;
 			}
@@ -406,7 +403,7 @@ do_entIF(unsigned long type, unsigned long a1,
 	info.si_signo = SIGILL;
 	info.si_errno = 0;
 	info.si_code = ILL_ILLOPC;
-	info.si_addr = regs.pc;
+	info.si_addr = (void *) regs->pc;
 	send_sig_info(SIGILL, &info, current);
 }
 
@@ -418,18 +415,16 @@ do_entIF(unsigned long type, unsigned long a1,
    and if we don't put something on the entry point we'll oops.  */
 
 asmlinkage void
-do_entDbg(unsigned long type, unsigned long a1,
-	  unsigned long a2, unsigned long a3, unsigned long a4,
-	  unsigned long a5, struct pt_regs regs)
+do_entDbg(struct pt_regs *regs)
 {
 	siginfo_t info;
 
-	die_if_kernel("Instruction fault", &regs, type, 0);
+	die_if_kernel("Instruction fault", regs, 0, 0);
 
 	info.si_signo = SIGILL;
 	info.si_errno = 0;
 	info.si_code = ILL_ILLOPC;
-	info.si_addr = regs.pc;
+	info.si_addr = (void *) regs->pc;
 	force_sig_info(SIGILL, &info, current);
 }
 
@@ -1114,9 +1109,7 @@ trap_init(void)
 	wrent(entDbg, 6);
 
 	/* Hack for Multia (UDB) and JENSEN: some of their SRMs have
-	 * a bug in the handling of the opDEC fault.  Fix it up if so.
-	 */
-	if (implver() == IMPLVER_EV4) {
+	   a bug in the handling of the opDEC fault.  Fix it up if so.  */
+	if (implver() == IMPLVER_EV4)
 		opDEC_check();
-	}
 }