19 files changed, 353 insertions, 259 deletions

diff --git a/arch/arm/kernel/apm.c b/arch/arm/kernel/apm.c
index 766b6c05c6d..2bed290fec7 100644
--- a/arch/arm/kernel/apm.c
+++ b/arch/arm/kernel/apm.c
@@ -357,10 +357,8 @@ static int apm_open(struct inode * inode, struct file * filp)
 {
 	struct apm_user *as;
 
-	as = (struct apm_user *)kmalloc(sizeof(*as), GFP_KERNEL);
+	as = (struct apm_user *)kzalloc(sizeof(*as), GFP_KERNEL);
 	if (as) {
-		memset(as, 0, sizeof(*as));
-
 		/*
 		 * XXX - this is a tiny bit broken, when we consider BSD
 		 * process accounting. If the device is opened by root, we
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index c4923fac8df..de606dfa8db 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -540,12 +540,10 @@ static void __init pcibios_init_hw(struct hw_pci *hw)
 	int nr, busnr;
 
 	for (nr = busnr = 0; nr < hw->nr_controllers; nr++) {
-		sys = kmalloc(sizeof(struct pci_sys_data), GFP_KERNEL);
+		sys = kzalloc(sizeof(struct pci_sys_data), GFP_KERNEL);
 		if (!sys)
 			panic("PCI: unable to allocate sys data!");
 
-		memset(sys, 0, sizeof(struct pci_sys_data));
-
 		sys->hw      = hw;
 		sys->busnr   = busnr;
 		sys->swizzle = hw->swizzle;
diff --git a/arch/arm/kernel/compat.c b/arch/arm/kernel/compat.c
index 7195add42e7..60cfa7f3226 100644
--- a/arch/arm/kernel/compat.c
+++ b/arch/arm/kernel/compat.c
@@ -27,6 +27,8 @@
 
 #include <asm/mach/arch.h>
 
+#include "compat.h"
+
 /*
  * Usage:
  *  - do not go blindly adding fields, add them at the end
diff --git a/arch/arm/kernel/compat.h b/arch/arm/kernel/compat.h
new file mode 100644
index 00000000000..27e61a68bd1
--- /dev/null
+++ b/arch/arm/kernel/compat.h
@@ -0,0 +1,13 @@
+/*
+ *  linux/arch/arm/kernel/compat.h
+ *
+ *  Copyright (C) 2001 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.
+*/
+
+extern void convert_to_tag_list(struct tag *tags);
+
+extern void squash_mem_tags(struct tag *tag);
diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S
index caaa919ab47..da280bae3d0 100644
--- a/arch/arm/kernel/debug.S
+++ b/arch/arm/kernel/debug.S
@@ -11,7 +11,6 @@
  */
 #include <linux/config.h>
 #include <linux/linkage.h>
-#include <asm/hardware.h>
 
 		.text
 
diff --git a/arch/arm/kernel/ecard.c b/arch/arm/kernel/ecard.c
index 74ea29c3205..00aa225e8d9 100644
--- a/arch/arm/kernel/ecard.c
+++ b/arch/arm/kernel/ecard.c
@@ -807,14 +807,12 @@ static struct expansion_card *__init ecard_alloc_card(int type, int slot)
 	unsigned long base;
 	int i;
 
-	ec = kmalloc(sizeof(ecard_t), GFP_KERNEL);
+	ec = kzalloc(sizeof(ecard_t), GFP_KERNEL);
 	if (!ec) {
 		ec = ERR_PTR(-ENOMEM);
 		goto nomem;
 	}
 
-	memset(ec, 0, sizeof(ecard_t));
-
 	ec->slot_no = slot;
 	ec->type = type;
 	ec->irq = NO_IRQ;
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index ec48d70c6d8..ab8e600c18c 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -484,7 +484,6 @@ call_fpe:
 	movcss	r7, r5, lsr #(TIF_USING_IWMMXT + 1)
 	bcs	iwmmxt_task_enable
 #endif
-	enable_irq
 	add	pc, pc, r8, lsr #6
 	mov	r0, r0
 
@@ -511,6 +510,7 @@ call_fpe:
 	mov	pc, lr				@ CP#15 (Control)
 
 do_fpe:
+	enable_irq
 	ldr	r4, .LCfp
 	add	r10, r10, #TI_FPSTATE		@ r10 = workspace
 	ldr	pc, [r4]			@ Call FP module USR entry point
@@ -666,7 +666,7 @@ __kuser_helper_start:
  *
  * #define __kernel_dmb() \
  *         asm volatile ( "mov r0, #0xffff0fff; mov lr, pc; sub pc, r0, #95" \
- *	        : : : "lr","cc" )
+ *	        : : : "r0", "lr","cc" )
  */
 
 __kuser_memory_barrier:				@ 0xffff0fa0
diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S
index 55c99cdab7d..f1c2fd5b63e 100644
--- a/arch/arm/kernel/entry-header.S
+++ b/arch/arm/kernel/entry-header.S
@@ -37,24 +37,6 @@
 #endif
 	.endm
 
-#if __LINUX_ARM_ARCH__ >= 6
-	.macro	disable_irq
-	cpsid	i
-	.endm
-
-	.macro	enable_irq
-	cpsie	i
-	.endm
-#else
-	.macro	disable_irq
-	msr	cpsr_c, #PSR_I_BIT | SVC_MODE
-	.endm
-
-	.macro	enable_irq
-	msr	cpsr_c, #SVC_MODE
-	.endm
-#endif
-
 	.macro	get_thread_info, rd
 	mov	\rd, sp, lsr #13
 	mov	\rd, \rd, lsl #13
diff --git a/arch/arm/kernel/head-common.S b/arch/arm/kernel/head-common.S
new file mode 100644
index 00000000000..a52da0ddb43
--- /dev/null
+++ b/arch/arm/kernel/head-common.S
@@ -0,0 +1,217 @@
+/*
+ *  linux/arch/arm/kernel/head-common.S
+ *
+ *  Copyright (C) 1994-2002 Russell King
+ *  Copyright (c) 2003 ARM Limited
+ *  All Rights Reserved
+ *
+ * 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.
+ *
+ */
+
+	.type	__switch_data, %object
+__switch_data:
+	.long	__mmap_switched
+	.long	__data_loc			@ r4
+	.long	__data_start			@ r5
+	.long	__bss_start			@ r6
+	.long	_end				@ r7
+	.long	processor_id			@ r4
+	.long	__machine_arch_type		@ r5
+	.long	cr_alignment			@ r6
+	.long	init_thread_union + THREAD_START_SP @ sp
+
+/*
+ * The following fragment of code is executed with the MMU on in MMU mode,
+ * and uses absolute addresses; this is not position independent.
+ *
+ *  r0  = cp#15 control register
+ *  r1  = machine ID
+ *  r9  = processor ID
+ */
+	.type	__mmap_switched, %function
+__mmap_switched:
+	adr	r3, __switch_data + 4
+
+	ldmia	r3!, {r4, r5, r6, r7}
+	cmp	r4, r5				@ Copy data segment if needed
+1:	cmpne	r5, r6
+	ldrne	fp, [r4], #4
+	strne	fp, [r5], #4
+	bne	1b
+
+	mov	fp, #0				@ Clear BSS (and zero fp)
+1:	cmp	r6, r7
+	strcc	fp, [r6],#4
+	bcc	1b
+
+	ldmia	r3, {r4, r5, r6, sp}
+	str	r9, [r4]			@ Save processor ID
+	str	r1, [r5]			@ Save machine type
+	bic	r4, r0, #CR_A			@ Clear 'A' bit
+	stmia	r6, {r0, r4}			@ Save control register values
+	b	start_kernel
+
+/*
+ * Exception handling.  Something went wrong and we can't proceed.  We
+ * ought to tell the user, but since we don't have any guarantee that
+ * we're even running on the right architecture, we do virtually nothing.
+ *
+ * If CONFIG_DEBUG_LL is set we try to print out something about the error
+ * and hope for the best (useful if bootloader fails to pass a proper
+ * machine ID for example).
+ */
+
+	.type	__error_p, %function
+__error_p:
+#ifdef CONFIG_DEBUG_LL
+	adr	r0, str_p1
+	bl	printascii
+	b	__error
+str_p1:	.asciz	"\nError: unrecognized/unsupported processor variant.\n"
+	.align
+#endif
+
+	.type	__error_a, %function
+__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, 3f
+	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
+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
+#endif
+
+	.type	__error, %function
+__error:
+#ifdef CONFIG_ARCH_RPC
+/*
+ * Turn the screen red on a error - RiscPC only.
+ */
+	mov	r0, #0x02000000
+	mov	r3, #0x11
+	orr	r3, r3, r3, lsl #8
+	orr	r3, r3, r3, lsl #16
+	str	r3, [r0], #4
+	str	r3, [r0], #4
+	str	r3, [r0], #4
+	str	r3, [r0], #4
+#endif
+1:	mov	r0, r0
+	b	1b
+
+
+/*
+ * Read processor ID register (CP#15, CR0), and look up in the linker-built
+ * supported processor list.  Note that we can't use the absolute addresses
+ * for the __proc_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.
+ *
+ *	r9 = cpuid
+ * Returns:
+ *	r3, r4, r6 corrupted
+ *	r5 = proc_info pointer in physical address space
+ *	r9 = cpuid (preserved)
+ */
+	.type	__lookup_processor_type, %function
+__lookup_processor_type:
+	adr	r3, 3f
+	ldmda	r3, {r5 - r7}
+	sub	r3, r3, r7			@ get offset between virt&phys
+	add	r5, r5, r3			@ convert virt addresses to
+	add	r6, r6, r3			@ physical address space
+1:	ldmia	r5, {r3, r4}			@ value, mask
+	and	r4, r4, r9			@ mask wanted bits
+	teq	r3, r4
+	beq	2f
+	add	r5, r5, #PROC_INFO_SZ		@ sizeof(proc_info_list)
+	cmp	r5, r6
+	blo	1b
+	mov	r5, #0				@ unknown processor
+2:	mov	pc, lr
+
+/*
+ * This provides a C-API version of the above function.
+ */
+ENTRY(lookup_processor_type)
+	stmfd	sp!, {r4 - r7, r9, lr}
+	mov	r9, r0
+	bl	__lookup_processor_type
+	mov	r0, r5
+	ldmfd	sp!, {r4 - r7, r9, pc}
+
+/*
+ * Look in include/asm-arm/procinfo.h and arch/arm/kernel/arch.[ch] for
+ * more information about the __proc_info and __arch_info structures.
+ */
+	.long	__proc_info_begin
+	.long	__proc_info_end
+3:	.long	.
+	.long	__arch_info_begin
+	.long	__arch_info_end
+
+/*
+ * 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
+ */
+	.type	__lookup_machine_type, %function
+__lookup_machine_type:
+	adr	r3, 3b
+	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
+
+/*
+ * This provides a C-API version of the above function.
+ */
+ENTRY(lookup_machine_type)
+	stmfd	sp!, {r4 - r6, lr}
+	mov	r1, r0
+	bl	__lookup_machine_type
+	mov	r0, r5
+	ldmfd	sp!, {r4 - r6, pc}
diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
new file mode 100644
index 00000000000..b093ab8738b
--- /dev/null
+++ b/arch/arm/kernel/head-nommu.S
@@ -0,0 +1,83 @@
+/*
+ *  linux/arch/arm/kernel/head-nommu.S
+ *
+ *  Copyright (C) 1994-2002 Russell King
+ *  Copyright (C) 2003-2006 Hyok S. Choi
+ *
+ * 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.
+ *
+ *  Common kernel startup code (non-paged MM)
+ *    for 32-bit CPUs which has a process ID register(CP15).
+ *
+ */
+#include <linux/config.h>
+#include <linux/linkage.h>
+#include <linux/init.h>
+
+#include <asm/assembler.h>
+#include <asm/mach-types.h>
+#include <asm/procinfo.h>
+#include <asm/ptrace.h>
+#include <asm/constants.h>
+#include <asm/system.h>
+
+#define PROCINFO_INITFUNC       12
+
+/*
+ * Kernel startup entry point.
+ * ---------------------------
+ *
+ * This is normally called from the decompressor code.  The requirements
+ * are: MMU = off, D-cache = off, I-cache = dont care, r0 = 0,
+ * r1 = machine nr.
+ *
+ * See linux/arch/arm/tools/mach-types for the complete list of machine
+ * numbers for r1.
+ *
+ */
+	__INIT
+	.type	stext, %function
+ENTRY(stext)
+	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | MODE_SVC @ ensure svc mode
+						@ and irqs disabled
+	mrc	p15, 0, r9, c0, c0		@ get processor id
+	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'
+
+	ldr	r13, __switch_data		@ address to jump to after
+						@ the initialization is done
+	adr	lr, __after_proc_init		@ return (PIC) address
+	add	pc, r10, #PROCINFO_INITFUNC
+
+/*
+ * Set the Control Register and Read the process ID.
+ */
+	.type	__after_proc_init, %function
+__after_proc_init:
+	mrc	p15, 0, r0, c1, c0, 0		@ read control reg
+#ifdef CONFIG_ALIGNMENT_TRAP
+	orr	r0, r0, #CR_A
+#else
+	bic	r0, r0, #CR_A
+#endif
+#ifdef CONFIG_CPU_DCACHE_DISABLE
+	bic	r0, r0, #CR_C
+#endif
+#ifdef CONFIG_CPU_BPREDICT_DISABLE
+	bic	r0, r0, #CR_Z
+#endif
+#ifdef CONFIG_CPU_ICACHE_DISABLE
+	bic	r0, r0, #CR_I
+#endif
+	mcr	p15, 0, r0, c1, c0, 0		@ write control reg
+
+	mov	pc, r13				@ clear the BSS and jump
+						@ to start_kernel
+
+#include "head-common.S"
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 1aca1775b28..04b66a9328e 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -28,10 +28,9 @@
 #define PROCINFO_INITFUNC	12
 
 #define MACHINFO_TYPE		0
-#define MACHINFO_PHYSRAM	4
-#define MACHINFO_PHYSIO		8
-#define MACHINFO_PGOFFIO	12
-#define MACHINFO_NAME		16
+#define MACHINFO_PHYSIO		4
+#define MACHINFO_PGOFFIO	8
+#define MACHINFO_NAME		12
 
 #define KERNEL_RAM_ADDR	(PAGE_OFFSET + TEXT_OFFSET)
 
@@ -82,6 +81,7 @@
 ENTRY(stext)
 	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | MODE_SVC @ ensure svc mode
 						@ and irqs disabled
+	mrc	p15, 0, r9, c0, c0		@ get processor id
 	bl	__lookup_processor_type		@ r5=procinfo r9=cpuid
 	movs	r10, r5				@ invalid processor (r5=0)?
 	beq	__error_p			@ yes, error 'p'
@@ -102,49 +102,6 @@ ENTRY(stext)
 	adr	lr, __enable_mmu		@ return (PIC) address
 	add	pc, r10, #PROCINFO_INITFUNC
 
-	.type	__switch_data, %object
-__switch_data:
-	.long	__mmap_switched
-	.long	__data_loc			@ r4
-	.long	__data_start			@ r5
-	.long	__bss_start			@ r6
-	.long	_end				@ r7
-	.long	processor_id			@ r4
-	.long	__machine_arch_type		@ r5
-	.long	cr_alignment			@ r6
-	.long	init_thread_union + THREAD_START_SP @ sp
-
-/*
- * The following fragment of code is executed with the MMU on, and uses
- * absolute addresses; this is not position independent.
- *
- *  r0  = cp#15 control register
- *  r1  = machine ID
- *  r9  = processor ID
- */
-	.type	__mmap_switched, %function
-__mmap_switched:
-	adr	r3, __switch_data + 4
-
-	ldmia	r3!, {r4, r5, r6, r7}
-	cmp	r4, r5				@ Copy data segment if needed
-1:	cmpne	r5, r6
-	ldrne	fp, [r4], #4
-	strne	fp, [r5], #4
-	bne	1b
-
-	mov	fp, #0				@ Clear BSS (and zero fp)
-1:	cmp	r6, r7
-	strcc	fp, [r6],#4
-	bcc	1b
-
-	ldmia	r3, {r4, r5, r6, sp}
-	str	r9, [r4]			@ Save processor ID
-	str	r1, [r5]			@ Save machine type
-	bic	r4, r0, #CR_A			@ Clear 'A' bit
-	stmia	r6, {r0, r4}			@ Save control register values
-	b	start_kernel
-
 #if defined(CONFIG_SMP)
 	.type   secondary_startup, #function
 ENTRY(secondary_startup)
@@ -156,6 +113,7 @@ ENTRY(secondary_startup)
 	 * as it has already been validated by the primary processor.
 	 */
 	msr	cpsr_c, #PSR_F_BIT | PSR_I_BIT | MODE_SVC
+	mrc	p15, 0, r9, c0, c0		@ get processor id
 	bl	__lookup_processor_type
 	movs	r10, r5				@ invalid processor?
 	moveq	r0, #'p'			@ yes, error 'p'
@@ -366,165 +324,4 @@ __create_page_tables:
 	mov	pc, lr
 	.ltorg
 
-
-
-/*
- * Exception handling.  Something went wrong and we can't proceed.  We
- * ought to tell the user, but since we don't have any guarantee that
- * we're even running on the right architecture, we do virtually nothing.
- *
- * If CONFIG_DEBUG_LL is set we try to print out something about the error
- * and hope for the best (useful if bootloader fails to pass a proper
- * machine ID for example).
- */
-
-	.type	__error_p, %function
-__error_p:
-#ifdef CONFIG_DEBUG_LL
-	adr	r0, str_p1
-	bl	printascii
-	b	__error
-str_p1:	.asciz	"\nError: unrecognized/unsupported processor variant.\n"
-	.align
-#endif
-
-	.type	__error_a, %function
-__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, 3f
-	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
-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
-#endif
-
-	.type	__error, %function
-__error:
-#ifdef CONFIG_ARCH_RPC
-/*
- * Turn the screen red on a error - RiscPC only.
- */
-	mov	r0, #0x02000000
-	mov	r3, #0x11
-	orr	r3, r3, r3, lsl #8
-	orr	r3, r3, r3, lsl #16
-	str	r3, [r0], #4
-	str	r3, [r0], #4
-	str	r3, [r0], #4
-	str	r3, [r0], #4
-#endif
-1:	mov	r0, r0
-	b	1b
-
-
-/*
- * Read processor ID register (CP#15, CR0), and look up in the linker-built
- * supported processor list.  Note that we can't use the absolute addresses
- * for the __proc_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.
- *
- * Returns:
- *	r3, r4, r6 corrupted
- *	r5 = proc_info pointer in physical address space
- *	r9 = cpuid
- */
-	.type	__lookup_processor_type, %function
-__lookup_processor_type:
-	adr	r3, 3f
-	ldmda	r3, {r5, r6, r9}
-	sub	r3, r3, r9			@ get offset between virt&phys
-	add	r5, r5, r3			@ convert virt addresses to
-	add	r6, r6, r3			@ physical address space
-	mrc	p15, 0, r9, c0, c0		@ get processor id
-1:	ldmia	r5, {r3, r4}			@ value, mask
-	and	r4, r4, r9			@ mask wanted bits
-	teq	r3, r4
-	beq	2f
-	add	r5, r5, #PROC_INFO_SZ		@ sizeof(proc_info_list)
-	cmp	r5, r6
-	blo	1b
-	mov	r5, #0				@ unknown processor
-2:	mov	pc, lr
-
-/*
- * This provides a C-API version of the above function.
- */
-ENTRY(lookup_processor_type)
-	stmfd	sp!, {r4 - r6, r9, lr}
-	bl	__lookup_processor_type
-	mov	r0, r5
-	ldmfd	sp!, {r4 - r6, r9, pc}
-
-/*
- * Look in include/asm-arm/procinfo.h and arch/arm/kernel/arch.[ch] for
- * more information about the __proc_info and __arch_info structures.
- */
-	.long	__proc_info_begin
-	.long	__proc_info_end
-3:	.long	.
-	.long	__arch_info_begin
-	.long	__arch_info_end
-
-/*
- * 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
- */
-	.type	__lookup_machine_type, %function
-__lookup_machine_type:
-	adr	r3, 3b
-	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
-
-/*
- * This provides a C-API version of the above function.
- */
-ENTRY(lookup_machine_type)
-	stmfd	sp!, {r4 - r6, lr}
-	mov	r1, r0
-	bl	__lookup_machine_type
-	mov	r0, r5
-	ldmfd	sp!, {r4 - r6, pc}
+#include "head-common.S"
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index 1d50d2b98f5..2d5896b3618 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -305,14 +305,19 @@ report_bad_irq(unsigned int irq, struct pt_regs *regs, struct irqdesc *desc, int
 	static int count = 100;
 	struct irqaction *action;
 
-	if (!count || noirqdebug)
+	if (noirqdebug)
 		return;
 
-	count--;
-
 	if (ret != IRQ_HANDLED && ret != IRQ_NONE) {
+		if (!count)
+			return;
+		count--;
 		printk("irq%u: bogus retval mask %x\n", irq, ret);
 	} else {
+		desc->irqs_unhandled++;
+		if (desc->irqs_unhandled <= 99900)
+			return;
+		desc->irqs_unhandled = 0;
 		printk("irq%u: nobody cared\n", irq);
 	}
 	show_regs(regs);
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 4b4e4cf79c8..1ff75cee4b0 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -27,6 +27,7 @@
 #include <linux/kallsyms.h>
 #include <linux/init.h>
 #include <linux/cpu.h>
+#include <linux/elfcore.h>
 
 #include <asm/leds.h>
 #include <asm/processor.h>
@@ -83,7 +84,7 @@ EXPORT_SYMBOL(pm_power_off);
  * This is our default idle handler.  We need to disable
  * interrupts here to ensure we don't miss a wakeup call.
  */
-void default_idle(void)
+static void default_idle(void)
 {
 	if (hlt_counter)
 		cpu_relax();
@@ -473,4 +474,3 @@ unsigned long get_wchan(struct task_struct *p)
 	} while (count ++ < 16);
 	return 0;
 }
-EXPORT_SYMBOL(get_wchan);
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index bc9e2f8ae32..a1d1b2906e8 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -628,7 +628,7 @@ static int ptrace_setwmmxregs(struct task_struct *tsk, void __user *ufp)
 	if (!test_ti_thread_flag(thread, TIF_USING_IWMMXT))
 		return -EACCES;
 	iwmmxt_task_release(thread);  /* force a reload */
-	return copy_from_user(&thead->fpstate.iwmmxt, ufp, IWMMXT_SIZE)
+	return copy_from_user(&thread->fpstate.iwmmxt, ufp, IWMMXT_SIZE)
 		? -EFAULT : 0;
 }
 
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 68273b4dc88..b7cd280bfd6 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -37,6 +37,8 @@
 #include <asm/mach/irq.h>
 #include <asm/mach/time.h>
 
+#include "compat.h"
+
 #ifndef MEM_SIZE
 #define MEM_SIZE	(16*1024*1024)
 #endif
@@ -53,10 +55,7 @@ static int __init fpe_setup(char *line)
 __setup("fpe=", fpe_setup);
 #endif
 
-extern unsigned int mem_fclk_21285;
 extern void paging_init(struct meminfo *, struct machine_desc *desc);
-extern void convert_to_tag_list(struct tag *tags);
-extern void squash_mem_tags(struct tag *tag);
 extern void reboot_setup(char *str);
 extern int root_mountflags;
 extern void _stext, _text, _etext, __data_start, _edata, _end;
@@ -279,7 +278,7 @@ int cpu_architecture(void)
  * These functions re-use the assembly code in head.S, which
  * already provide the required functionality.
  */
-extern struct proc_info_list *lookup_processor_type(void);
+extern struct proc_info_list *lookup_processor_type(unsigned int);
 extern struct machine_desc *lookup_machine_type(unsigned int);
 
 static void __init setup_processor(void)
@@ -291,7 +290,7 @@ static void __init setup_processor(void)
 	 * types.  The linker builds this table for us from the
 	 * entries in arch/arm/mm/proc-*.S
 	 */
-	list = lookup_processor_type();
+	list = lookup_processor_type(processor_id);
 	if (!list) {
 		printk("CPU configuration botched (ID %08x), unable "
 		       "to continue.\n", processor_id);
diff --git a/arch/arm/kernel/signal.h b/arch/arm/kernel/signal.h
index 9991049c522..27beece1550 100644
--- a/arch/arm/kernel/signal.h
+++ b/arch/arm/kernel/signal.h
@@ -7,6 +7,6 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#define KERN_SIGRETURN_CODE	0xffff0500
+#define KERN_SIGRETURN_CODE	(CONFIG_VECTORS_BASE + 0x00000500)
 
 extern const unsigned long sigreturn_codes[7];
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 02aa300c463..1370d726dc1 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -337,9 +337,6 @@ void __init smp_prepare_boot_cpu(void)
 	unsigned int cpu = smp_processor_id();
 
 	per_cpu(cpu_data, cpu).idle = current;
-
-	cpu_set(cpu, cpu_present_map);
-	cpu_set(cpu, cpu_online_map);
 }
 
 static void send_ipi_message(cpumask_t callmap, enum ipi_msg_type msg)
diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index a491de2d902..8170af47143 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -234,7 +234,12 @@ asmlinkage int sys_ipc(uint call, int first, int second, int third,
  */
 asmlinkage int sys_fork(struct pt_regs *regs)
 {
+#ifdef CONFIG_MMU
 	return do_fork(SIGCHLD, regs->ARM_sp, regs, 0, NULL, NULL);
+#else
+	/* can not support in nommu mode */
+	return(-EINVAL);
+#endif
 }
 
 /* Clone a task - this clones the calling program thread.
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 03924bcc612..35230a06010 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -506,7 +506,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
 		if (!pmd_present(*pmd))
 			goto bad_access;
 		pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
-		if (!pte_present(*pte) || !pte_write(*pte)) {
+		if (!pte_present(*pte) || !pte_dirty(*pte)) {
 			pte_unmap_unlock(pte, ptl);
 			goto bad_access;
 		}
@@ -688,6 +688,7 @@ EXPORT_SYMBOL(abort);
 
 void __init trap_init(void)
 {
+	unsigned long vectors = CONFIG_VECTORS_BASE;
 	extern char __stubs_start[], __stubs_end[];
 	extern char __vectors_start[], __vectors_end[];
 	extern char __kuser_helper_start[], __kuser_helper_end[];
@@ -698,9 +699,9 @@ void __init trap_init(void)
 	 * into the vector page, mapped at 0xffff0000, and ensure these
 	 * are visible to the instruction stream.
 	 */
-	memcpy((void *)0xffff0000, __vectors_start, __vectors_end - __vectors_start);
-	memcpy((void *)0xffff0200, __stubs_start, __stubs_end - __stubs_start);
-	memcpy((void *)0xffff1000 - kuser_sz, __kuser_helper_start, kuser_sz);
+	memcpy((void *)vectors, __vectors_start, __vectors_end - __vectors_start);
+	memcpy((void *)vectors + 0x200, __stubs_start, __stubs_end - __stubs_start);
+	memcpy((void *)vectors + 0x1000 - kuser_sz, __kuser_helper_start, kuser_sz);
 
 	/*
 	 * Copy signal return handlers into the vector page, and
@@ -709,6 +710,6 @@ void __init trap_init(void)
 	memcpy((void *)KERN_SIGRETURN_CODE, sigreturn_codes,
 	       sizeof(sigreturn_codes));
 
-	flush_icache_range(0xffff0000, 0xffff0000 + PAGE_SIZE);
+	flush_icache_range(vectors, vectors + PAGE_SIZE);
 	modify_domain(DOMAIN_USER, DOMAIN_CLIENT);
 }