Merge branch 'misc' into devel

Conflicts:
	arch/arm/Kconfig

12 files changed, 94 insertions, 563 deletions

diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index c6273a3..d86fcd4 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -583,6 +583,11 @@ void __init pci_common_init(struct hw_pci *hw)
 			 * Assign resources.
 			 */
 			pci_bus_assign_resources(bus);
+
+			/*
+			 * Enable bridges
+			 */
+			pci_enable_bridges(bus);
 		}
 
 		/*
diff --git a/arch/arm/kernel/head-common.S b/arch/arm/kernel/head-common.S
index 8f57515..c84b57d 100644
--- a/arch/arm/kernel/head-common.S
+++ b/arch/arm/kernel/head-common.S
@@ -25,83 +25,6 @@
  * machine ID for example).
  */
 	__HEAD
-__error_a:
-#ifdef CONFIG_DEBUG_LL
-	mov	r4, r1				@ preserve machine ID
-	adr	r0, str_a1
-	bl	printascii
-	mov	r0, r4
-	bl	printhex8
-	adr	r0, str_a2
-	bl	printascii
-	adr	r3, __lookup_machine_type_data
-	ldmia	r3, {r4, r5, r6}		@ get machine desc list
-	sub	r4, r3, r4			@ get offset between virt&phys
-	add	r5, r5, r4			@ convert virt addresses to
-	add	r6, r6, r4			@ physical address space
-1:	ldr	r0, [r5, #MACHINFO_TYPE]	@ get machine type
-	bl	printhex8
-	mov	r0, #'\t'
-	bl	printch
-	ldr     r0, [r5, #MACHINFO_NAME]	@ get machine name
-	add	r0, r0, r4
-	bl	printascii
-	mov	r0, #'\n'
-	bl	printch
-	add	r5, r5, #SIZEOF_MACHINE_DESC	@ next machine_desc
-	cmp	r5, r6
-	blo	1b
-	adr	r0, str_a3
-	bl	printascii
-	b	__error
-ENDPROC(__error_a)
-
-str_a1:	.asciz	"\nError: unrecognized/unsupported machine ID (r1 = 0x"
-str_a2:	.asciz	").\n\nAvailable machine support:\n\nID (hex)\tNAME\n"
-str_a3:	.asciz	"\nPlease check your kernel config and/or bootloader.\n"
-	.align
-#else
-	b	__error
-#endif
-
-/*
- * Lookup machine architecture in the linker-build list of architectures.
- * Note that we can't use the absolute addresses for the __arch_info
- * lists since we aren't running with the MMU on (and therefore, we are
- * not in the correct address space).  We have to calculate the offset.
- *
- *  r1 = machine architecture number
- * Returns:
- *  r3, r4, r6 corrupted
- *  r5 = mach_info pointer in physical address space
- */
-__lookup_machine_type:
-	adr	r3, __lookup_machine_type_data
-	ldmia	r3, {r4, r5, r6}
-	sub	r3, r3, r4			@ get offset between virt&phys
-	add	r5, r5, r3			@ convert virt addresses to
-	add	r6, r6, r3			@ physical address space
-1:	ldr	r3, [r5, #MACHINFO_TYPE]	@ get machine type
-	teq	r3, r1				@ matches loader number?
-	beq	2f				@ found
-	add	r5, r5, #SIZEOF_MACHINE_DESC	@ next machine_desc
-	cmp	r5, r6
-	blo	1b
-	mov	r5, #0				@ unknown machine
-2:	mov	pc, lr
-ENDPROC(__lookup_machine_type)
-
-/*
- * Look in arch/arm/kernel/arch.[ch] for information about the
- * __arch_info structures.
- */
-	.align	2
-	.type	__lookup_machine_type_data, %object
-__lookup_machine_type_data:
-	.long	.
-	.long	__arch_info_begin
-	.long	__arch_info_end
-	.size	__lookup_machine_type_data, . - __lookup_machine_type_data
 
 /* Determine validity of the r2 atags pointer.  The heuristic requires
  * that the pointer be aligned, in the first 16k of physical RAM and
@@ -109,8 +32,6 @@ __lookup_machine_type_data:
  * of this function may be more lenient with the physical address and
  * may also be able to move the ATAGS block if necessary.
  *
- * r8  = machinfo
- *
  * Returns:
  *  r2 either valid atags pointer, or zero
  *  r5, r6 corrupted
@@ -185,17 +106,6 @@ __mmap_switched_data:
 	.size	__mmap_switched_data, . - __mmap_switched_data
 
 /*
- * This provides a C-API version of __lookup_machine_type
- */
-ENTRY(lookup_machine_type)
-	stmfd	sp!, {r4 - r6, lr}
-	mov	r1, r0
-	bl	__lookup_machine_type
-	mov	r0, r5
-	ldmfd	sp!, {r4 - r6, pc}
-ENDPROC(lookup_machine_type)
-
-/*
  * This provides a C-API version of __lookup_processor_type
  */
 ENTRY(lookup_processor_type)
diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
index 814ce1a..6b1e0ad 100644
--- a/arch/arm/kernel/head-nommu.S
+++ b/arch/arm/kernel/head-nommu.S
@@ -44,9 +44,6 @@ ENTRY(stext)
 	bl	__lookup_processor_type		@ r5=procinfo r9=cpuid
 	movs	r10, r5				@ invalid processor (r5=0)?
 	beq	__error_p				@ yes, error 'p'
-	bl	__lookup_machine_type		@ r5=machinfo
-	movs	r8, r5				@ invalid machine (r5=0)?
-	beq	__error_a			@ yes, error 'a'
 
 	adr	lr, BSYM(__after_proc_init)	@ return (PIC) address
  ARM(	add	pc, r10, #PROCINFO_INITFUNC	)
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index f06ff9f..60fe279 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -87,14 +87,10 @@ ENTRY(stext)
 	movs	r10, r5				@ invalid processor (r5=0)?
  THUMB( it	eq )		@ force fixup-able long branch encoding
 	beq	__error_p			@ yes, error 'p'
-	bl	__lookup_machine_type		@ r5=machinfo
-	movs	r8, r5				@ invalid machine (r5=0)?
- THUMB( it	eq )		@ force fixup-able long branch encoding
-	beq	__error_a			@ yes, error 'a'
 
 	/*
 	 * r1 = machine no, r2 = atags,
-	 * r8 = machinfo, r9 = cpuid, r10 = procinfo
+	 * r9 = cpuid, r10 = procinfo
 	 */
 	bl	__vet_atags
 #ifdef CONFIG_SMP_ON_UP
@@ -105,7 +101,7 @@ ENTRY(stext)
 	/*
 	 * The following calls CPU specific code in a position independent
 	 * manner.  See arch/arm/mm/proc-*.S for details.  r10 = base of
-	 * xxx_proc_info structure selected by __lookup_machine_type
+	 * xxx_proc_info structure selected by __lookup_processor_type
 	 * above.  On return, the CPU will be ready for the MMU to be
 	 * turned on, and r0 will hold the CPU control register value.
 	 */
@@ -124,7 +120,6 @@ ENDPROC(stext)
  * amount which are required to get the kernel running, which
  * generally means mapping in the kernel code.
  *
- * r8  = machinfo
  * r9  = cpuid
  * r10 = procinfo
  *
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index 28536e3..3535d37 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -179,14 +179,21 @@ int __init arch_probe_nr_irqs(void)
 
 #ifdef CONFIG_HOTPLUG_CPU
 
-static void route_irq(struct irq_desc *desc, unsigned int irq, unsigned int cpu)
+static bool migrate_one_irq(struct irq_data *d)
 {
-	pr_debug("IRQ%u: moving from cpu%u to cpu%u\n", irq, desc->irq_data.node, cpu);
+	unsigned int cpu = cpumask_any_and(d->affinity, cpu_online_mask);
+	bool ret = false;
 
-	raw_spin_lock_irq(&desc->lock);
-	desc->irq_data.chip->irq_set_affinity(&desc->irq_data,
-					      cpumask_of(cpu), false);
-	raw_spin_unlock_irq(&desc->lock);
+	if (cpu >= nr_cpu_ids) {
+		cpu = cpumask_any(cpu_online_mask);
+		ret = true;
+	}
+
+	pr_debug("IRQ%u: moving from cpu%u to cpu%u\n", d->irq, d->node, cpu);
+
+	d->chip->irq_set_affinity(d, cpumask_of(cpu), true);
+
+	return ret;
 }
 
 /*
@@ -198,25 +205,30 @@ void migrate_irqs(void)
 {
 	unsigned int i, cpu = smp_processor_id();
 	struct irq_desc *desc;
+	unsigned long flags;
+
+	local_irq_save(flags);
 
 	for_each_irq_desc(i, desc) {
 		struct irq_data *d = &desc->irq_data;
+		bool affinity_broken = false;
 
-		if (d->node == cpu) {
-			unsigned int newcpu = cpumask_any_and(d->affinity,
-							      cpu_online_mask);
-			if (newcpu >= nr_cpu_ids) {
-				if (printk_ratelimit())
-					printk(KERN_INFO "IRQ%u no longer affine to CPU%u\n",
-					       i, cpu);
+		raw_spin_lock(&desc->lock);
+		do {
+			if (desc->action == NULL)
+				break;
 
-				cpumask_setall(d->affinity);
-				newcpu = cpumask_any_and(d->affinity,
-							 cpu_online_mask);
-			}
+			if (d->node != cpu)
+				break;
 
-			route_irq(desc, i, newcpu);
-		}
+			affinity_broken = migrate_one_irq(d);
+		} while (0);
+		raw_spin_unlock(&desc->lock);
+
+		if (affinity_broken && printk_ratelimit())
+			pr_warning("IRQ%u no longer affine to CPU%u\n", i, cpu);
 	}
+
+	local_irq_restore(flags);
 }
 #endif /* CONFIG_HOTPLUG_CPU */
diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index 6d4105e..6fcf22c 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -76,6 +76,7 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
 	for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rel); i++, rel++) {
 		unsigned long loc;
 		Elf32_Sym *sym;
+		const char *symname;
 		s32 offset;
 #ifdef CONFIG_THUMB2_KERNEL
 		u32 upper, lower, sign, j1, j2;
@@ -83,18 +84,18 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
 
 		offset = ELF32_R_SYM(rel->r_info);
 		if (offset < 0 || offset > (symsec->sh_size / sizeof(Elf32_Sym))) {
-			printk(KERN_ERR "%s: bad relocation, section %d reloc %d\n",
+			pr_err("%s: section %u reloc %u: bad relocation sym offset\n",
 				module->name, relindex, i);
 			return -ENOEXEC;
 		}
 
 		sym = ((Elf32_Sym *)symsec->sh_addr) + offset;
+		symname = strtab + sym->st_name;
 
 		if (rel->r_offset < 0 || rel->r_offset > dstsec->sh_size - sizeof(u32)) {
-			printk(KERN_ERR "%s: out of bounds relocation, "
-				"section %d reloc %d offset %d size %d\n",
-				module->name, relindex, i, rel->r_offset,
-				dstsec->sh_size);
+			pr_err("%s: section %u reloc %u sym '%s': out of bounds relocation, offset %d size %u\n",
+			       module->name, relindex, i, symname,
+			       rel->r_offset, dstsec->sh_size);
 			return -ENOEXEC;
 		}
 
@@ -120,10 +121,10 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
 			if (offset & 3 ||
 			    offset <= (s32)0xfe000000 ||
 			    offset >= (s32)0x02000000) {
-				printk(KERN_ERR
-				       "%s: relocation out of range, section "
-				       "%d reloc %d sym '%s'\n", module->name,
-				       relindex, i, strtab + sym->st_name);
+				pr_err("%s: section %u reloc %u sym '%s': relocation %u out of range (%#lx -> %#x)\n",
+				       module->name, relindex, i, symname,
+				       ELF32_R_TYPE(rel->r_info), loc,
+				       sym->st_value);
 				return -ENOEXEC;
 			}
 
@@ -196,10 +197,10 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
 			if (!(offset & 1) ||
 			    offset <= (s32)0xff000000 ||
 			    offset >= (s32)0x01000000) {
-				printk(KERN_ERR
-				       "%s: relocation out of range, section "
-				       "%d reloc %d sym '%s'\n", module->name,
-				       relindex, i, strtab + sym->st_name);
+				pr_err("%s: section %u reloc %u sym '%s': relocation %u out of range (%#lx -> %#x)\n",
+				       module->name, relindex, i, symname,
+				       ELF32_R_TYPE(rel->r_info), loc,
+				       sym->st_value);
 				return -ENOEXEC;
 			}
 
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index b13e70f..2bf27f3 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -26,8 +26,6 @@
 #include <asm/system.h>
 #include <asm/traps.h>
 
-#include "ptrace.h"
-
 #define REG_PC	15
 #define REG_PSR	16
 /*
@@ -184,389 +182,12 @@ put_user_reg(struct task_struct *task, int offset, long data)
 	return ret;
 }
 
-static inline int
-read_u32(struct task_struct *task, unsigned long addr, u32 *res)
-{
-	int ret;
-
-	ret = access_process_vm(task, addr, res, sizeof(*res), 0);
-
-	return ret == sizeof(*res) ? 0 : -EIO;
-}
-
-static inline int
-read_instr(struct task_struct *task, unsigned long addr, u32 *res)
-{
-	int ret;
-
-	if (addr & 1) {
-		u16 val;
-		ret = access_process_vm(task, addr & ~1, &val, sizeof(val), 0);
-		ret = ret == sizeof(val) ? 0 : -EIO;
-		*res = val;
-	} else {
-		u32 val;
-		ret = access_process_vm(task, addr & ~3, &val, sizeof(val), 0);
-		ret = ret == sizeof(val) ? 0 : -EIO;
-		*res = val;
-	}
-	return ret;
-}
-
-/*
- * Get value of register `rn' (in the instruction)
- */
-static unsigned long
-ptrace_getrn(struct task_struct *child, unsigned long insn)
-{
-	unsigned int reg = (insn >> 16) & 15;
-	unsigned long val;
-
-	val = get_user_reg(child, reg);
-	if (reg == 15)
-		val += 8;
-
-	return val;
-}
-
-/*
- * Get value of operand 2 (in an ALU instruction)
- */
-static unsigned long
-ptrace_getaluop2(struct task_struct *child, unsigned long insn)
-{
-	unsigned long val;
-	int shift;
-	int type;
-
-	if (insn & 1 << 25) {
-		val = insn & 255;
-		shift = (insn >> 8) & 15;
-		type = 3;
-	} else {
-		val = get_user_reg (child, insn & 15);
-
-		if (insn & (1 << 4))
-			shift = (int)get_user_reg (child, (insn >> 8) & 15);
-		else
-			shift = (insn >> 7) & 31;
-
-		type = (insn >> 5) & 3;
-	}
-
-	switch (type) {
-	case 0:	val <<= shift;	break;
-	case 1:	val >>= shift;	break;
-	case 2:
-		val = (((signed long)val) >> shift);
-		break;
-	case 3:
- 		val = (val >> shift) | (val << (32 - shift));
-		break;
-	}
-	return val;
-}
-
-/*
- * Get value of operand 2 (in a LDR instruction)
- */
-static unsigned long
-ptrace_getldrop2(struct task_struct *child, unsigned long insn)
-{
-	unsigned long val;
-	int shift;
-	int type;
-
-	val = get_user_reg(child, insn & 15);
-	shift = (insn >> 7) & 31;
-	type = (insn >> 5) & 3;
-
-	switch (type) {
-	case 0:	val <<= shift;	break;
-	case 1:	val >>= shift;	break;
-	case 2:
-		val = (((signed long)val) >> shift);
-		break;
-	case 3:
- 		val = (val >> shift) | (val << (32 - shift));
-		break;
-	}
-	return val;
-}
-
-#define OP_MASK	0x01e00000
-#define OP_AND	0x00000000
-#define OP_EOR	0x00200000
-#define OP_SUB	0x00400000
-#define OP_RSB	0x00600000
-#define OP_ADD	0x00800000
-#define OP_ADC	0x00a00000
-#define OP_SBC	0x00c00000
-#define OP_RSC	0x00e00000
-#define OP_ORR	0x01800000
-#define OP_MOV	0x01a00000
-#define OP_BIC	0x01c00000
-#define OP_MVN	0x01e00000
-
-static unsigned long
-get_branch_address(struct task_struct *child, unsigned long pc, unsigned long insn)
-{
-	u32 alt = 0;
-
-	switch (insn & 0x0e000000) {
-	case 0x00000000:
-	case 0x02000000: {
-		/*
-		 * data processing
-		 */
-		long aluop1, aluop2, ccbit;
-
-	        if ((insn & 0x0fffffd0) == 0x012fff10) {
-		        /*
-			 * bx or blx
-			 */
-			alt = get_user_reg(child, insn & 15);
-			break;
-		}
-
-
-		if ((insn & 0xf000) != 0xf000)
-			break;
-
-		aluop1 = ptrace_getrn(child, insn);
-		aluop2 = ptrace_getaluop2(child, insn);
-		ccbit  = get_user_reg(child, REG_PSR) & PSR_C_BIT ? 1 : 0;
-
-		switch (insn & OP_MASK) {
-		case OP_AND: alt = aluop1 & aluop2;		break;
-		case OP_EOR: alt = aluop1 ^ aluop2;		break;
-		case OP_SUB: alt = aluop1 - aluop2;		break;
-		case OP_RSB: alt = aluop2 - aluop1;		break;
-		case OP_ADD: alt = aluop1 + aluop2;		break;
-		case OP_ADC: alt = aluop1 + aluop2 + ccbit;	break;
-		case OP_SBC: alt = aluop1 - aluop2 + ccbit;	break;
-		case OP_RSC: alt = aluop2 - aluop1 + ccbit;	break;
-		case OP_ORR: alt = aluop1 | aluop2;		break;
-		case OP_MOV: alt = aluop2;			break;
-		case OP_BIC: alt = aluop1 & ~aluop2;		break;
-		case OP_MVN: alt = ~aluop2;			break;
-		}
-		break;
-	}
-
-	case 0x04000000:
-	case 0x06000000:
-		/*
-		 * ldr
-		 */
-		if ((insn & 0x0010f000) == 0x0010f000) {
-			unsigned long base;
-
-			base = ptrace_getrn(child, insn);
-			if (insn & 1 << 24) {
-				long aluop2;
-
-				if (insn & 0x02000000)
-					aluop2 = ptrace_getldrop2(child, insn);
-				else
-					aluop2 = insn & 0xfff;
-
-				if (insn & 1 << 23)
-					base += aluop2;
-				else
-					base -= aluop2;
-			}
-			read_u32(child, base, &alt);
-		}
-		break;
-
-	case 0x08000000:
-		/*
-		 * ldm
-		 */
-		if ((insn & 0x00108000) == 0x00108000) {
-			unsigned long base;
-			unsigned int nr_regs;
-
-			if (insn & (1 << 23)) {
-				nr_regs = hweight16(insn & 65535) << 2;
-
-				if (!(insn & (1 << 24)))
-					nr_regs -= 4;
-			} else {
-				if (insn & (1 << 24))
-					nr_regs = -4;
-				else
-					nr_regs = 0;
-			}
-
-			base = ptrace_getrn(child, insn);
-
-			read_u32(child, base + nr_regs, &alt);
-			break;
-		}
-		break;
-
-	case 0x0a000000: {
-		/*
-		 * bl or b
-		 */
-		signed long displ;
-		/* It's a branch/branch link: instead of trying to
-		 * figure out whether the branch will be taken or not,
-		 * we'll put a breakpoint at both locations.  This is
-		 * simpler, more reliable, and probably not a whole lot
-		 * slower than the alternative approach of emulating the
-		 * branch.
-		 */
-		displ = (insn & 0x00ffffff) << 8;
-		displ = (displ >> 6) + 8;
-		if (displ != 0 && displ != 4)
-			alt = pc + displ;
-	    }
-	    break;
-	}
-
-	return alt;
-}
-
-static int
-swap_insn(struct task_struct *task, unsigned long addr,
-	  void *old_insn, void *new_insn, int size)
-{
-	int ret;
-
-	ret = access_process_vm(task, addr, old_insn, size, 0);
-	if (ret == size)
-		ret = access_process_vm(task, addr, new_insn, size, 1);
-	return ret;
-}
-
-static void
-add_breakpoint(struct task_struct *task, struct debug_info *dbg, unsigned long addr)
-{
-	int nr = dbg->nsaved;
-
-	if (nr < 2) {
-		u32 new_insn = BREAKINST_ARM;
-		int res;
-
-		res = swap_insn(task, addr, &dbg->bp[nr].insn, &new_insn, 4);
-
-		if (res == 4) {
-			dbg->bp[nr].address = addr;
-			dbg->nsaved += 1;
-		}
-	} else
-		printk(KERN_ERR "ptrace: too many breakpoints\n");
-}
-
-/*
- * Clear one breakpoint in the user program.  We copy what the hardware
- * does and use bit 0 of the address to indicate whether this is a Thumb
- * breakpoint or an ARM breakpoint.
- */
-static void clear_breakpoint(struct task_struct *task, struct debug_entry *bp)
-{
-	unsigned long addr = bp->address;
-	union debug_insn old_insn;
-	int ret;
-
-	if (addr & 1) {
-		ret = swap_insn(task, addr & ~1, &old_insn.thumb,
-				&bp->insn.thumb, 2);
-
-		if (ret != 2 || old_insn.thumb != BREAKINST_THUMB)
-			printk(KERN_ERR "%s:%d: corrupted Thumb breakpoint at "
-				"0x%08lx (0x%04x)\n", task->comm,
-				task_pid_nr(task), addr, old_insn.thumb);
-	} else {
-		ret = swap_insn(task, addr & ~3, &old_insn.arm,
-				&bp->insn.arm, 4);
-
-		if (ret != 4 || old_insn.arm != BREAKINST_ARM)
-			printk(KERN_ERR "%s:%d: corrupted ARM breakpoint at "
-				"0x%08lx (0x%08x)\n", task->comm,
-				task_pid_nr(task), addr, old_insn.arm);
-	}
-}
-
-void ptrace_set_bpt(struct task_struct *child)
-{
-	struct pt_regs *regs;
-	unsigned long pc;
-	u32 insn;
-	int res;
-
-	regs = task_pt_regs(child);
-	pc = instruction_pointer(regs);
-
-	if (thumb_mode(regs)) {
-		printk(KERN_WARNING "ptrace: can't handle thumb mode\n");
-		return;
-	}
-
-	res = read_instr(child, pc, &insn);
-	if (!res) {
-		struct debug_info *dbg = &child->thread.debug;
-		unsigned long alt;
-
-		dbg->nsaved = 0;
-
-		alt = get_branch_address(child, pc, insn);
-		if (alt)
-			add_breakpoint(child, dbg, alt);
-
-		/*
-		 * Note that we ignore the result of setting the above
-		 * breakpoint since it may fail.  When it does, this is
-		 * not so much an error, but a forewarning that we may
-		 * be receiving a prefetch abort shortly.
-		 *
-		 * If we don't set this breakpoint here, then we can
-		 * lose control of the thread during single stepping.
-		 */
-		if (!alt || predicate(insn) != PREDICATE_ALWAYS)
-			add_breakpoint(child, dbg, pc + 4);
-	}
-}
-
-/*
- * Ensure no single-step breakpoint is pending.  Returns non-zero
- * value if child was being single-stepped.
- */
-void ptrace_cancel_bpt(struct task_struct *child)
-{
-	int i, nsaved = child->thread.debug.nsaved;
-
-	child->thread.debug.nsaved = 0;
-
-	if (nsaved > 2) {
-		printk("ptrace_cancel_bpt: bogus nsaved: %d!\n", nsaved);
-		nsaved = 2;
-	}
-
-	for (i = 0; i < nsaved; i++)
-		clear_breakpoint(child, &child->thread.debug.bp[i]);
-}
-
-void user_disable_single_step(struct task_struct *task)
-{
-	task->ptrace &= ~PT_SINGLESTEP;
-	ptrace_cancel_bpt(task);
-}
-
-void user_enable_single_step(struct task_struct *task)
-{
-	task->ptrace |= PT_SINGLESTEP;
-}
-
 /*
  * Called by kernel/ptrace.c when detaching..
  */
 void ptrace_disable(struct task_struct *child)
 {
-	user_disable_single_step(child);
+	/* Nothing to do. */
 }
 
 /*
@@ -576,8 +197,6 @@ void ptrace_break(struct task_struct *tsk, struct pt_regs *regs)
 {
 	siginfo_t info;
 
-	ptrace_cancel_bpt(tsk);
-
 	info.si_signo = SIGTRAP;
 	info.si_errno = 0;
 	info.si_code  = TRAP_BRKPT;
diff --git a/arch/arm/kernel/ptrace.h b/arch/arm/kernel/ptrace.h
deleted file mode 100644
index 3926605..0000000
--- a/arch/arm/kernel/ptrace.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- *  linux/arch/arm/kernel/ptrace.h
- *
- *  Copyright (C) 2000-2003 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/ptrace.h>
-
-extern void ptrace_cancel_bpt(struct task_struct *);
-extern void ptrace_set_bpt(struct task_struct *);
-extern void ptrace_break(struct task_struct *, struct pt_regs *);
-
-/*
- * Send SIGTRAP if we're single-stepping
- */
-static inline void single_step_trap(struct task_struct *task)
-{
-	if (task->ptrace & PT_SINGLESTEP) {
-		ptrace_cancel_bpt(task);
-		send_sig(SIGTRAP, task, 1);
-	}
-}
-
-static inline void single_step_clear(struct task_struct *task)
-{
-	if (task->ptrace & PT_SINGLESTEP)
-		ptrace_cancel_bpt(task);
-}
-
-static inline void single_step_set(struct task_struct *task)
-{
-	if (task->ptrace & PT_SINGLESTEP)
-		ptrace_set_bpt(task);
-}
diff --git a/arch/arm/kernel/return_address.c b/arch/arm/kernel/return_address.c
index df246da..0b13a72 100644
--- a/arch/arm/kernel/return_address.c
+++ b/arch/arm/kernel/return_address.c
@@ -9,6 +9,7 @@
  * the Free Software Foundation.
  */
 #include <linux/module.h>
+#include <linux/ftrace.h>
 
 #if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND)
 #include <linux/sched.h>
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 5ea4fb71..db23828 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -308,7 +308,44 @@ static void __init cacheid_init(void)
  * already provide the required functionality.
  */
 extern struct proc_info_list *lookup_processor_type(unsigned int);
-extern struct machine_desc *lookup_machine_type(unsigned int);
+
+static void __init early_print(const char *str, ...)
+{
+	extern void printascii(const char *);
+	char buf[256];
+	va_list ap;
+
+	va_start(ap, str);
+	vsnprintf(buf, sizeof(buf), str, ap);
+	va_end(ap);
+
+#ifdef CONFIG_DEBUG_LL
+	printascii(buf);
+#endif
+	printk("%s", buf);
+}
+
+static struct machine_desc * __init lookup_machine_type(unsigned int type)
+{
+	extern struct machine_desc __arch_info_begin[], __arch_info_end[];
+	struct machine_desc *p;
+
+	for (p = __arch_info_begin; p < __arch_info_end; p++)
+		if (type == p->nr)
+			return p;
+
+	early_print("\n"
+		"Error: unrecognized/unsupported machine ID (r1 = 0x%08x).\n\n"
+		"Available machine support:\n\nID (hex)\tNAME\n", type);
+
+	for (p = __arch_info_begin; p < __arch_info_end; p++)
+		early_print("%08x\t%s\n", p->nr, p->name);
+
+	early_print("\nPlease check your kernel config and/or bootloader.\n");
+
+	while (true)
+		/* can't use cpu_relax() here as it may require MMU setup */;
+}
 
 static void __init feat_v6_fixup(void)
 {
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index abaf844..cb83983 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -20,7 +20,6 @@
 #include <asm/unistd.h>
 #include <asm/vfp.h>
 
-#include "ptrace.h"
 #include "signal.h"
 
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
@@ -348,8 +347,6 @@ asmlinkage int sys_sigreturn(struct pt_regs *regs)
 	if (restore_sigframe(regs, frame))
 		goto badframe;
 
-	single_step_trap(current);
-
 	return regs->ARM_r0;
 
 badframe:
@@ -383,8 +380,6 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
 	if (do_sigaltstack(&frame->sig.uc.uc_stack, NULL, regs->ARM_sp) == -EFAULT)
 		goto badframe;
 
-	single_step_trap(current);
-
 	return regs->ARM_r0;
 
 badframe:
@@ -706,8 +701,6 @@ static void do_signal(struct pt_regs *regs, int syscall)
 	if (try_to_freeze())
 		goto no_signal;
 
-	single_step_clear(current);
-
 	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
 	if (signr > 0) {
 		sigset_t *oldset;
@@ -726,7 +719,6 @@ static void do_signal(struct pt_regs *regs, int syscall)
 			if (test_thread_flag(TIF_RESTORE_SIGMASK))
 				clear_thread_flag(TIF_RESTORE_SIGMASK);
 		}
-		single_step_set(current);
 		return;
 	}
 
@@ -772,7 +764,6 @@ static void do_signal(struct pt_regs *regs, int syscall)
 			sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
 		}
 	}
-	single_step_set(current);
 }
 
 asmlinkage void
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index ee57640..21ac43f 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -23,6 +23,7 @@
 #include <linux/kexec.h>
 #include <linux/delay.h>
 #include <linux/init.h>
+#include <linux/sched.h>
 
 #include <asm/atomic.h>
 #include <asm/cacheflush.h>
@@ -32,7 +33,6 @@
 #include <asm/unwind.h>
 #include <asm/tls.h>
 
-#include "ptrace.h"
 #include "signal.h"
 
 static const char *handler[]= { "prefetch abort", "data abort", "address exception", "interrupt" };
@@ -256,7 +256,7 @@ static int __die(const char *str, int err, struct thread_info *thread, struct pt
 	return ret;
 }
 
-DEFINE_SPINLOCK(die_lock);
+static DEFINE_SPINLOCK(die_lock);
 
 /*
  * This function is protected against re-entrancy.