13 files changed, 755 insertions, 160 deletions

diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 79087dd6d869..dd00f747e2ad 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -17,6 +17,8 @@ obj-y		:= compat.o elf.o entry-armv.o entry-common.o irq.o \
 		   process.o ptrace.o return_address.o setup.o signal.o \
 		   sys_arm.o stacktrace.o time.o traps.o
 
+obj-$(CONFIG_OC_ETM)		+= etm.o
+
 obj-$(CONFIG_ISA_DMA_API)	+= dma.o
 obj-$(CONFIG_ARCH_ACORN)	+= ecard.o 
 obj-$(CONFIG_FIQ)		+= fiq.o
@@ -52,5 +54,6 @@ endif
 
 head-y			:= head$(MMUEXT).o
 obj-$(CONFIG_DEBUG_LL)	+= debug.o
+obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
 
 extra-y := $(head-y) init_task.o vmlinux.lds
diff --git a/arch/arm/kernel/armksyms.c b/arch/arm/kernel/armksyms.c
index 0e627705f746..8214bfebfaca 100644
--- a/arch/arm/kernel/armksyms.c
+++ b/arch/arm/kernel/armksyms.c
@@ -48,27 +48,7 @@ extern void __aeabi_uidivmod(void);
 extern void __aeabi_ulcmp(void);
 
 extern void fpundefinstr(void);
-extern void fp_enter(void);
 
-/*
- * This has a special calling convention; it doesn't
- * modify any of the usual registers, except for LR.
- */
-#define EXPORT_CRC_ALIAS(sym) __CRC_SYMBOL(sym, "")
-
-#define EXPORT_SYMBOL_ALIAS(sym,orig)		\
- EXPORT_CRC_ALIAS(sym)				\
- static const struct kernel_symbol __ksymtab_##sym	\
-  __used __attribute__((section("__ksymtab"))) =	\
-    { (unsigned long)&orig, #sym };
-
-/*
- * floating point math emulator support.
- * These symbols will never change their calling convention...
- */
-EXPORT_SYMBOL_ALIAS(kern_fp_enter,fp_enter);
-EXPORT_SYMBOL_ALIAS(fp_printk,printk);
-EXPORT_SYMBOL_ALIAS(fp_send_sig,send_sig);
 
 EXPORT_SYMBOL(__backtrace);
 
diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
index fafce1b5c69f..9314a2d681f1 100644
--- a/arch/arm/kernel/calls.S
+++ b/arch/arm/kernel/calls.S
@@ -172,7 +172,7 @@
 /* 160 */	CALL(sys_sched_get_priority_min)
 		CALL(sys_sched_rr_get_interval)
 		CALL(sys_nanosleep)
-		CALL(sys_arm_mremap)
+		CALL(sys_mremap)
 		CALL(sys_setresuid16)
 /* 165 */	CALL(sys_getresuid16)
 		CALL(sys_ni_syscall)		/* vm86 */
@@ -374,6 +374,7 @@
 		CALL(sys_pwritev)
 		CALL(sys_rt_tgsigqueueinfo)
 		CALL(sys_perf_event_open)
+/* 365 */	CALL(sys_recvmmsg)
 #ifndef syscalls_counted
 .equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls
 #define syscalls_counted
diff --git a/arch/arm/kernel/early_printk.c b/arch/arm/kernel/early_printk.c
new file mode 100644
index 000000000000..85aa2b292692
--- /dev/null
+++ b/arch/arm/kernel/early_printk.c
@@ -0,0 +1,57 @@
+/*
+ *  linux/arch/arm/kernel/early_printk.c
+ *
+ *  Copyright (C) 2009 Sascha Hauer <s.hauer@pengutronix.de>
+ *
+ * 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/kernel.h>
+#include <linux/console.h>
+#include <linux/init.h>
+
+extern void printch(int);
+
+static void early_write(const char *s, unsigned n)
+{
+	while (n-- > 0) {
+		if (*s == '\n')
+			printch('\r');
+		printch(*s);
+		s++;
+	}
+}
+
+static void early_console_write(struct console *con, const char *s, unsigned n)
+{
+	early_write(s, n);
+}
+
+static struct console early_console = {
+	.name =		"earlycon",
+	.write =	early_console_write,
+	.flags =	CON_PRINTBUFFER | CON_BOOT,
+	.index =	-1,
+};
+
+asmlinkage void early_printk(const char *fmt, ...)
+{
+	char buf[512];
+	int n;
+	va_list ap;
+
+	va_start(ap, fmt);
+	n = vscnprintf(buf, sizeof(buf), fmt, ap);
+	early_write(buf, n);
+	va_end(ap);
+}
+
+static int __init setup_early_printk(char *buf)
+{
+	register_console(&early_console);
+	return 0;
+}
+
+early_param("earlyprintk", setup_early_printk);
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index f0fe95b7085d..2c1db77d7848 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -416,12 +416,12 @@ sys_mmap2:
 		tst	r5, #PGOFF_MASK
 		moveq	r5, r5, lsr #PAGE_SHIFT - 12
 		streq	r5, [sp, #4]
-		beq	do_mmap2
+		beq	sys_mmap_pgoff
 		mov	r0, #-EINVAL
 		mov	pc, lr
 #else
 		str	r5, [sp, #4]
-		b	do_mmap2
+		b	sys_mmap_pgoff
 #endif
 ENDPROC(sys_mmap2)
 
diff --git a/arch/arm/kernel/etm.c b/arch/arm/kernel/etm.c
new file mode 100644
index 000000000000..827753966301
--- /dev/null
+++ b/arch/arm/kernel/etm.c
@@ -0,0 +1,641 @@
+/*
+ * linux/arch/arm/kernel/etm.c
+ *
+ * Driver for ARM's Embedded Trace Macrocell and Embedded Trace Buffer.
+ *
+ * Copyright (C) 2009 Nokia Corporation.
+ * Alexander Shishkin
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/io.h>
+#include <linux/sysrq.h>
+#include <linux/device.h>
+#include <linux/clk.h>
+#include <linux/amba/bus.h>
+#include <linux/fs.h>
+#include <linux/uaccess.h>
+#include <linux/miscdevice.h>
+#include <linux/vmalloc.h>
+#include <linux/mutex.h>
+#include <asm/hardware/coresight.h>
+#include <asm/sections.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Alexander Shishkin");
+
+static struct tracectx tracer;
+
+static inline bool trace_isrunning(struct tracectx *t)
+{
+	return !!(t->flags & TRACER_RUNNING);
+}
+
+static int etm_setup_address_range(struct tracectx *t, int n,
+		unsigned long start, unsigned long end, int exclude, int data)
+{
+	u32 flags = ETMAAT_ARM | ETMAAT_IGNCONTEXTID | ETMAAT_NSONLY | \
+		    ETMAAT_NOVALCMP;
+
+	if (n < 1 || n > t->ncmppairs)
+		return -EINVAL;
+
+	/* comparators and ranges are numbered starting with 1 as opposed
+	 * to bits in a word */
+	n--;
+
+	if (data)
+		flags |= ETMAAT_DLOADSTORE;
+	else
+		flags |= ETMAAT_IEXEC;
+
+	/* first comparator for the range */
+	etm_writel(t, flags, ETMR_COMP_ACC_TYPE(n * 2));
+	etm_writel(t, start, ETMR_COMP_VAL(n * 2));
+
+	/* second comparator is right next to it */
+	etm_writel(t, flags, ETMR_COMP_ACC_TYPE(n * 2 + 1));
+	etm_writel(t, end, ETMR_COMP_VAL(n * 2 + 1));
+
+	flags = exclude ? ETMTE_INCLEXCL : 0;
+	etm_writel(t, flags | (1 << n), ETMR_TRACEENCTRL);
+
+	return 0;
+}
+
+static int trace_start(struct tracectx *t)
+{
+	u32 v;
+	unsigned long timeout = TRACER_TIMEOUT;
+
+	etb_unlock(t);
+
+	etb_writel(t, 0, ETBR_FORMATTERCTRL);
+	etb_writel(t, 1, ETBR_CTRL);
+
+	etb_lock(t);
+
+	/* configure etm */
+	v = ETMCTRL_OPTS | ETMCTRL_PROGRAM | ETMCTRL_PORTSIZE(t->etm_portsz);
+
+	if (t->flags & TRACER_CYCLE_ACC)
+		v |= ETMCTRL_CYCLEACCURATE;
+
+	etm_unlock(t);
+
+	etm_writel(t, v, ETMR_CTRL);
+
+	while (!(etm_readl(t, ETMR_CTRL) & ETMCTRL_PROGRAM) && --timeout)
+		;
+	if (!timeout) {
+		dev_dbg(t->dev, "Waiting for progbit to assert timed out\n");
+		etm_lock(t);
+		return -EFAULT;
+	}
+
+	etm_setup_address_range(t, 1, (unsigned long)_stext,
+			(unsigned long)_etext, 0, 0);
+	etm_writel(t, 0, ETMR_TRACEENCTRL2);
+	etm_writel(t, 0, ETMR_TRACESSCTRL);
+	etm_writel(t, 0x6f, ETMR_TRACEENEVT);
+
+	v &= ~ETMCTRL_PROGRAM;
+	v |= ETMCTRL_PORTSEL;
+
+	etm_writel(t, v, ETMR_CTRL);
+
+	timeout = TRACER_TIMEOUT;
+	while (etm_readl(t, ETMR_CTRL) & ETMCTRL_PROGRAM && --timeout)
+		;
+	if (!timeout) {
+		dev_dbg(t->dev, "Waiting for progbit to deassert timed out\n");
+		etm_lock(t);
+		return -EFAULT;
+	}
+
+	etm_lock(t);
+
+	t->flags |= TRACER_RUNNING;
+
+	return 0;
+}
+
+static int trace_stop(struct tracectx *t)
+{
+	unsigned long timeout = TRACER_TIMEOUT;
+
+	etm_unlock(t);
+
+	etm_writel(t, 0x440, ETMR_CTRL);
+	while (!(etm_readl(t, ETMR_CTRL) & ETMCTRL_PROGRAM) && --timeout)
+		;
+	if (!timeout) {
+		dev_dbg(t->dev, "Waiting for progbit to assert timed out\n");
+		etm_lock(t);
+		return -EFAULT;
+	}
+
+	etm_lock(t);
+
+	etb_unlock(t);
+	etb_writel(t, ETBFF_MANUAL_FLUSH, ETBR_FORMATTERCTRL);
+
+	timeout = TRACER_TIMEOUT;
+	while (etb_readl(t, ETBR_FORMATTERCTRL) &
+			ETBFF_MANUAL_FLUSH && --timeout)
+		;
+	if (!timeout) {
+		dev_dbg(t->dev, "Waiting for formatter flush to commence "
+				"timed out\n");
+		etb_lock(t);
+		return -EFAULT;
+	}
+
+	etb_writel(t, 0, ETBR_CTRL);
+
+	etb_lock(t);
+
+	t->flags &= ~TRACER_RUNNING;
+
+	return 0;
+}
+
+static int etb_getdatalen(struct tracectx *t)
+{
+	u32 v;
+	int rp, wp;
+
+	v = etb_readl(t, ETBR_STATUS);
+
+	if (v & 1)
+		return t->etb_bufsz;
+
+	rp = etb_readl(t, ETBR_READADDR);
+	wp = etb_readl(t, ETBR_WRITEADDR);
+
+	if (rp > wp) {
+		etb_writel(t, 0, ETBR_READADDR);
+		etb_writel(t, 0, ETBR_WRITEADDR);
+
+		return 0;
+	}
+
+	return wp - rp;
+}
+
+/* sysrq+v will always stop the running trace and leave it at that */
+static void etm_dump(void)
+{
+	struct tracectx *t = &tracer;
+	u32 first = 0;
+	int length;
+
+	if (!t->etb_regs) {
+		printk(KERN_INFO "No tracing hardware found\n");
+		return;
+	}
+
+	if (trace_isrunning(t))
+		trace_stop(t);
+
+	etb_unlock(t);
+
+	length = etb_getdatalen(t);
+
+	if (length == t->etb_bufsz)
+		first = etb_readl(t, ETBR_WRITEADDR);
+
+	etb_writel(t, first, ETBR_READADDR);
+
+	printk(KERN_INFO "Trace buffer contents length: %d\n", length);
+	printk(KERN_INFO "--- ETB buffer begin ---\n");
+	for (; length; length--)
+		printk("%08x", cpu_to_be32(etb_readl(t, ETBR_READMEM)));
+	printk(KERN_INFO "\n--- ETB buffer end ---\n");
+
+	/* deassert the overflow bit */
+	etb_writel(t, 1, ETBR_CTRL);
+	etb_writel(t, 0, ETBR_CTRL);
+
+	etb_writel(t, 0, ETBR_TRIGGERCOUNT);
+	etb_writel(t, 0, ETBR_READADDR);
+	etb_writel(t, 0, ETBR_WRITEADDR);
+
+	etb_lock(t);
+}
+
+static void sysrq_etm_dump(int key, struct tty_struct *tty)
+{
+	dev_dbg(tracer.dev, "Dumping ETB buffer\n");
+	etm_dump();
+}
+
+static struct sysrq_key_op sysrq_etm_op = {
+	.handler = sysrq_etm_dump,
+	.help_msg = "ETM buffer dump",
+	.action_msg = "etm",
+};
+
+static int etb_open(struct inode *inode, struct file *file)
+{
+	if (!tracer.etb_regs)
+		return -ENODEV;
+
+	file->private_data = &tracer;
+
+	return nonseekable_open(inode, file);
+}
+
+static ssize_t etb_read(struct file *file, char __user *data,
+		size_t len, loff_t *ppos)
+{
+	int total, i;
+	long length;
+	struct tracectx *t = file->private_data;
+	u32 first = 0;
+	u32 *buf;
+
+	mutex_lock(&t->mutex);
+
+	if (trace_isrunning(t)) {
+		length = 0;
+		goto out;
+	}
+
+	etb_unlock(t);
+
+	total = etb_getdatalen(t);
+	if (total == t->etb_bufsz)
+		first = etb_readl(t, ETBR_WRITEADDR);
+
+	etb_writel(t, first, ETBR_READADDR);
+
+	length = min(total * 4, (int)len);
+	buf = vmalloc(length);
+
+	dev_dbg(t->dev, "ETB buffer length: %d\n", total);
+	dev_dbg(t->dev, "ETB status reg: %x\n", etb_readl(t, ETBR_STATUS));
+	for (i = 0; i < length / 4; i++)
+		buf[i] = etb_readl(t, ETBR_READMEM);
+
+	/* the only way to deassert overflow bit in ETB status is this */
+	etb_writel(t, 1, ETBR_CTRL);
+	etb_writel(t, 0, ETBR_CTRL);
+
+	etb_writel(t, 0, ETBR_WRITEADDR);
+	etb_writel(t, 0, ETBR_READADDR);
+	etb_writel(t, 0, ETBR_TRIGGERCOUNT);
+
+	etb_lock(t);
+
+	length -= copy_to_user(data, buf, length);
+	vfree(buf);
+
+out:
+	mutex_unlock(&t->mutex);
+
+	return length;
+}
+
+static int etb_release(struct inode *inode, struct file *file)
+{
+	/* there's nothing to do here, actually */
+	return 0;
+}
+
+static const struct file_operations etb_fops = {
+	.owner = THIS_MODULE,
+	.read = etb_read,
+	.open = etb_open,
+	.release = etb_release,
+};
+
+static struct miscdevice etb_miscdev = {
+	.name = "tracebuf",
+	.minor = 0,
+	.fops = &etb_fops,
+};
+
+static int __init etb_probe(struct amba_device *dev, struct amba_id *id)
+{
+	struct tracectx *t = &tracer;
+	int ret = 0;
+
+	ret = amba_request_regions(dev, NULL);
+	if (ret)
+		goto out;
+
+	t->etb_regs = ioremap_nocache(dev->res.start, resource_size(&dev->res));
+	if (!t->etb_regs) {
+		ret = -ENOMEM;
+		goto out_release;
+	}
+
+	amba_set_drvdata(dev, t);
+
+	etb_miscdev.parent = &dev->dev;
+
+	ret = misc_register(&etb_miscdev);
+	if (ret)
+		goto out_unmap;
+
+	t->emu_clk = clk_get(&dev->dev, "emu_src_ck");
+	if (IS_ERR(t->emu_clk)) {
+		dev_dbg(&dev->dev, "Failed to obtain emu_src_ck.\n");
+		return -EFAULT;
+	}
+
+	clk_enable(t->emu_clk);
+
+	etb_unlock(t);
+	t->etb_bufsz = etb_readl(t, ETBR_DEPTH);
+	dev_dbg(&dev->dev, "Size: %x\n", t->etb_bufsz);
+
+	/* make sure trace capture is disabled */
+	etb_writel(t, 0, ETBR_CTRL);
+	etb_writel(t, 0x1000, ETBR_FORMATTERCTRL);
+	etb_lock(t);
+
+	dev_dbg(&dev->dev, "ETB AMBA driver initialized.\n");
+
+out:
+	return ret;
+
+out_unmap:
+	amba_set_drvdata(dev, NULL);
+	iounmap(t->etb_regs);
+
+out_release:
+	amba_release_regions(dev);
+
+	return ret;
+}
+
+static int etb_remove(struct amba_device *dev)
+{
+	struct tracectx *t = amba_get_drvdata(dev);
+
+	amba_set_drvdata(dev, NULL);
+
+	iounmap(t->etb_regs);
+	t->etb_regs = NULL;
+
+	clk_disable(t->emu_clk);
+	clk_put(t->emu_clk);
+
+	amba_release_regions(dev);
+
+	return 0;
+}
+
+static struct amba_id etb_ids[] = {
+	{
+		.id	= 0x0003b907,
+		.mask	= 0x0007ffff,
+	},
+	{ 0, 0 },
+};
+
+static struct amba_driver etb_driver = {
+	.drv		= {
+		.name	= "etb",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= etb_probe,
+	.remove		= etb_remove,
+	.id_table	= etb_ids,
+};
+
+/* use a sysfs file "trace_running" to start/stop tracing */
+static ssize_t trace_running_show(struct kobject *kobj,
+				  struct kobj_attribute *attr,
+				  char *buf)
+{
+	return sprintf(buf, "%x\n", trace_isrunning(&tracer));
+}
+
+static ssize_t trace_running_store(struct kobject *kobj,
+				   struct kobj_attribute *attr,
+				   const char *buf, size_t n)
+{
+	unsigned int value;
+	int ret;
+
+	if (sscanf(buf, "%u", &value) != 1)
+		return -EINVAL;
+
+	mutex_lock(&tracer.mutex);
+	ret = value ? trace_start(&tracer) : trace_stop(&tracer);
+	mutex_unlock(&tracer.mutex);
+
+	return ret ? : n;
+}
+
+static struct kobj_attribute trace_running_attr =
+	__ATTR(trace_running, 0644, trace_running_show, trace_running_store);
+
+static ssize_t trace_info_show(struct kobject *kobj,
+				  struct kobj_attribute *attr,
+				  char *buf)
+{
+	u32 etb_wa, etb_ra, etb_st, etb_fc, etm_ctrl, etm_st;
+	int datalen;
+
+	etb_unlock(&tracer);
+	datalen = etb_getdatalen(&tracer);
+	etb_wa = etb_readl(&tracer, ETBR_WRITEADDR);
+	etb_ra = etb_readl(&tracer, ETBR_READADDR);
+	etb_st = etb_readl(&tracer, ETBR_STATUS);
+	etb_fc = etb_readl(&tracer, ETBR_FORMATTERCTRL);
+	etb_lock(&tracer);
+
+	etm_unlock(&tracer);
+	etm_ctrl = etm_readl(&tracer, ETMR_CTRL);
+	etm_st = etm_readl(&tracer, ETMR_STATUS);
+	etm_lock(&tracer);
+
+	return sprintf(buf, "Trace buffer len: %d\nComparator pairs: %d\n"
+			"ETBR_WRITEADDR:\t%08x\n"
+			"ETBR_READADDR:\t%08x\n"
+			"ETBR_STATUS:\t%08x\n"
+			"ETBR_FORMATTERCTRL:\t%08x\n"
+			"ETMR_CTRL:\t%08x\n"
+			"ETMR_STATUS:\t%08x\n",
+			datalen,
+			tracer.ncmppairs,
+			etb_wa,
+			etb_ra,
+			etb_st,
+			etb_fc,
+			etm_ctrl,
+			etm_st
+			);
+}
+
+static struct kobj_attribute trace_info_attr =
+	__ATTR(trace_info, 0444, trace_info_show, NULL);
+
+static ssize_t trace_mode_show(struct kobject *kobj,
+				  struct kobj_attribute *attr,
+				  char *buf)
+{
+	return sprintf(buf, "%d %d\n",
+			!!(tracer.flags & TRACER_CYCLE_ACC),
+			tracer.etm_portsz);
+}
+
+static ssize_t trace_mode_store(struct kobject *kobj,
+				   struct kobj_attribute *attr,
+				   const char *buf, size_t n)
+{
+	unsigned int cycacc, portsz;
+
+	if (sscanf(buf, "%u %u", &cycacc, &portsz) != 2)
+		return -EINVAL;
+
+	mutex_lock(&tracer.mutex);
+	if (cycacc)
+		tracer.flags |= TRACER_CYCLE_ACC;
+	else
+		tracer.flags &= ~TRACER_CYCLE_ACC;
+
+	tracer.etm_portsz = portsz & 0x0f;
+	mutex_unlock(&tracer.mutex);
+
+	return n;
+}
+
+static struct kobj_attribute trace_mode_attr =
+	__ATTR(trace_mode, 0644, trace_mode_show, trace_mode_store);
+
+static int __init etm_probe(struct amba_device *dev, struct amba_id *id)
+{
+	struct tracectx *t = &tracer;
+	int ret = 0;
+
+	if (t->etm_regs) {
+		dev_dbg(&dev->dev, "ETM already initialized\n");
+		ret = -EBUSY;
+		goto out;
+	}
+
+	ret = amba_request_regions(dev, NULL);
+	if (ret)
+		goto out;
+
+	t->etm_regs = ioremap_nocache(dev->res.start, resource_size(&dev->res));
+	if (!t->etm_regs) {
+		ret = -ENOMEM;
+		goto out_release;
+	}
+
+	amba_set_drvdata(dev, t);
+
+	mutex_init(&t->mutex);
+	t->dev = &dev->dev;
+	t->flags = TRACER_CYCLE_ACC;
+	t->etm_portsz = 1;
+
+	etm_unlock(t);
+	ret = etm_readl(t, CSCR_PRSR);
+
+	t->ncmppairs = etm_readl(t, ETMR_CONFCODE) & 0xf;
+	etm_writel(t, 0x440, ETMR_CTRL);
+	etm_lock(t);
+
+	ret = sysfs_create_file(&dev->dev.kobj,
+			&trace_running_attr.attr);
+	if (ret)
+		goto out_unmap;
+
+	/* failing to create any of these two is not fatal */
+	ret = sysfs_create_file(&dev->dev.kobj, &trace_info_attr.attr);
+	if (ret)
+		dev_dbg(&dev->dev, "Failed to create trace_info in sysfs\n");
+
+	ret = sysfs_create_file(&dev->dev.kobj, &trace_mode_attr.attr);
+	if (ret)
+		dev_dbg(&dev->dev, "Failed to create trace_mode in sysfs\n");
+
+	dev_dbg(t->dev, "ETM AMBA driver initialized.\n");
+
+out:
+	return ret;
+
+out_unmap:
+	amba_set_drvdata(dev, NULL);
+	iounmap(t->etm_regs);
+
+out_release:
+	amba_release_regions(dev);
+
+	return ret;
+}
+
+static int etm_remove(struct amba_device *dev)
+{
+	struct tracectx *t = amba_get_drvdata(dev);
+
+	amba_set_drvdata(dev, NULL);
+
+	iounmap(t->etm_regs);
+	t->etm_regs = NULL;
+
+	amba_release_regions(dev);
+
+	sysfs_remove_file(&dev->dev.kobj, &trace_running_attr.attr);
+	sysfs_remove_file(&dev->dev.kobj, &trace_info_attr.attr);
+	sysfs_remove_file(&dev->dev.kobj, &trace_mode_attr.attr);
+
+	return 0;
+}
+
+static struct amba_id etm_ids[] = {
+	{
+		.id	= 0x0003b921,
+		.mask	= 0x0007ffff,
+	},
+	{ 0, 0 },
+};
+
+static struct amba_driver etm_driver = {
+	.drv		= {
+		.name   = "etm",
+		.owner  = THIS_MODULE,
+	},
+	.probe		= etm_probe,
+	.remove		= etm_remove,
+	.id_table	= etm_ids,
+};
+
+static int __init etm_init(void)
+{
+	int retval;
+
+	retval = amba_driver_register(&etb_driver);
+	if (retval) {
+		printk(KERN_ERR "Failed to register etb\n");
+		return retval;
+	}
+
+	retval = amba_driver_register(&etm_driver);
+	if (retval) {
+		amba_driver_unregister(&etb_driver);
+		printk(KERN_ERR "Failed to probe etm\n");
+		return retval;
+	}
+
+	/* not being able to install this handler is not fatal */
+	(void)register_sysrq_key('v', &sysrq_etm_op);
+
+	return 0;
+}
+
+device_initcall(etm_init);
+
diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
index e5dfc2895e24..573b803dc6bf 100644
--- a/arch/arm/kernel/head-nommu.S
+++ b/arch/arm/kernel/head-nommu.S
@@ -32,7 +32,7 @@
  * numbers for r1.
  *
  */
-	.section ".text.head", "ax"
+	__HEAD
 ENTRY(stext)
 	setmode	PSR_F_BIT | PSR_I_BIT | SVC_MODE, r9 @ ensure svc mode
 						@ and irqs disabled
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 38ccbe1d3b2c..eb62bf947212 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -74,7 +74,7 @@
  * crap here - that's what the boot loader (or in extreme, well justified
  * circumstances, zImage) is for.
  */
-	.section ".text.head", "ax"
+	__HEAD
 ENTRY(stext)
 	setmode	PSR_F_BIT | PSR_I_BIT | SVC_MODE, r9 @ ensure svc mode
 						@ and irqs disabled
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index c9a8619f3856..b7cb45bb91e8 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -69,7 +69,7 @@ int show_interrupts(struct seq_file *p, void *v)
 	}
 
 	if (i < NR_IRQS) {
-		spin_lock_irqsave(&irq_desc[i].lock, flags);
+		raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
 		action = irq_desc[i].action;
 		if (!action)
 			goto unlock;
@@ -84,7 +84,7 @@ int show_interrupts(struct seq_file *p, void *v)
 
 		seq_putc(p, '\n');
 unlock:
-		spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+		raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
 	} else if (i == NR_IRQS) {
 #ifdef CONFIG_FIQ
 		show_fiq_list(p, v);
@@ -139,7 +139,7 @@ void set_irq_flags(unsigned int irq, unsigned int iflags)
 	}
 
 	desc = irq_desc + irq;
-	spin_lock_irqsave(&desc->lock, flags);
+	raw_spin_lock_irqsave(&desc->lock, flags);
 	desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
 	if (iflags & IRQF_VALID)
 		desc->status &= ~IRQ_NOREQUEST;
@@ -147,7 +147,7 @@ void set_irq_flags(unsigned int irq, unsigned int iflags)
 		desc->status &= ~IRQ_NOPROBE;
 	if (!(iflags & IRQF_NOAUTOEN))
 		desc->status &= ~IRQ_NOAUTOEN;
-	spin_unlock_irqrestore(&desc->lock, flags);
+	raw_spin_unlock_irqrestore(&desc->lock, flags);
 }
 
 void __init init_IRQ(void)
@@ -166,9 +166,9 @@ static void route_irq(struct irq_desc *desc, unsigned int irq, unsigned int cpu)
 {
 	pr_debug("IRQ%u: moving from cpu%u to cpu%u\n", irq, desc->node, cpu);
 
-	spin_lock_irq(&desc->lock);
+	raw_spin_lock_irq(&desc->lock);
 	desc->chip->set_affinity(irq, cpumask_of(cpu));
-	spin_unlock_irq(&desc->lock);
+	raw_spin_unlock_irq(&desc->lock);
 }
 
 /*
diff --git a/arch/arm/kernel/isa.c b/arch/arm/kernel/isa.c
index 8ac9b8424007..346485910732 100644
--- a/arch/arm/kernel/isa.c
+++ b/arch/arm/kernel/isa.c
@@ -22,47 +22,42 @@ static unsigned int isa_membase, isa_portbase, isa_portshift;
 
 static ctl_table ctl_isa_vars[4] = {
 	{
-		.ctl_name	= BUS_ISA_MEM_BASE,
 		.procname	= "membase",
 		.data		= &isa_membase, 
 		.maxlen		= sizeof(isa_membase),
 		.mode		= 0444,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	}, {
-		.ctl_name	= BUS_ISA_PORT_BASE,
 		.procname	= "portbase",
 		.data		= &isa_portbase, 
 		.maxlen		= sizeof(isa_portbase),
 		.mode		= 0444,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= proc_dointvec,
 	}, {
-		.ctl_name	= BUS_ISA_PORT_SHIFT,
 		.procname	= "portshift",
 		.data		= &isa_portshift, 
 		.maxlen		= sizeof(isa_portshift),
 		.mode		= 0444,
-		.proc_handler	= &proc_dointvec,
-	}, {0}
+		.proc_handler	= proc_dointvec,
+	}, {}
 };
 
 static struct ctl_table_header *isa_sysctl_header;
 
 static ctl_table ctl_isa[2] = {
 	{
-		.ctl_name	= CTL_BUS_ISA,
 		.procname	= "isa",
 		.mode		= 0555,
 		.child		= ctl_isa_vars,
-	}, {0}
+	}, {}
 };
 
 static ctl_table ctl_bus[2] = {
 	{
-		.ctl_name	= CTL_BUS,
 		.procname	= "bus",
 		.mode		= 0555,
 		.child		= ctl_isa,
-	}, {0}
+	}, {}
 };
 
 void __init
diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c
index a73a34dccf2a..ea02a7b1c244 100644
--- a/arch/arm/kernel/smp_twd.c
+++ b/arch/arm/kernel/smp_twd.c
@@ -160,6 +160,7 @@ void __cpuinit twd_timer_setup(struct clock_event_device *clk)
 
 	/* Make sure our local interrupt controller has this enabled */
 	local_irq_save(flags);
+	irq_to_desc(clk->irq)->status |= IRQ_NOPROBE;
 	get_irq_chip(clk->irq)->unmask(clk->irq);
 	local_irq_restore(flags);
 
diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index 78ecaac65206..ae4027bd01bd 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -28,41 +28,6 @@
 #include <linux/ipc.h>
 #include <linux/uaccess.h>
 
-extern unsigned long do_mremap(unsigned long addr, unsigned long old_len,
-			       unsigned long new_len, unsigned long flags,
-			       unsigned long new_addr);
-
-/* common code for old and new mmaps */
-inline long do_mmap2(
-	unsigned long addr, unsigned long len,
-	unsigned long prot, unsigned long flags,
-	unsigned long fd, unsigned long pgoff)
-{
-	int error = -EINVAL;
-	struct file * file = NULL;
-
-	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
-
-	if (flags & MAP_FIXED && addr < FIRST_USER_ADDRESS)
-		goto out;
-
-	error = -EBADF;
-	if (!(flags & MAP_ANONYMOUS)) {
-		file = fget(fd);
-		if (!file)
-			goto out;
-	}
-
-	down_write(&current->mm->mmap_sem);
-	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
-	up_write(&current->mm->mmap_sem);
-
-	if (file)
-		fput(file);
-out:
-	return error;
-}
-
 struct mmap_arg_struct {
 	unsigned long addr;
 	unsigned long len;
@@ -84,29 +49,11 @@ asmlinkage int old_mmap(struct mmap_arg_struct __user *arg)
 	if (a.offset & ~PAGE_MASK)
 		goto out;
 
-	error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
+	error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
 out:
 	return error;
 }
 
-asmlinkage unsigned long
-sys_arm_mremap(unsigned long addr, unsigned long old_len,
-	       unsigned long new_len, unsigned long flags,
-	       unsigned long new_addr)
-{
-	unsigned long ret = -EINVAL;
-
-	if (flags & MREMAP_FIXED && new_addr < FIRST_USER_ADDRESS)
-		goto out;
-
-	down_write(&current->mm->mmap_sem);
-	ret = do_mremap(addr, old_len, new_len, flags, new_addr);
-	up_write(&current->mm->mmap_sem);
-
-out:
-	return ret;
-}
-
 /*
  * Perform the select(nd, in, out, ex, tv) and mmap() system
  * calls.
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index aecf87dfbaec..4957e13ef55b 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -24,13 +24,11 @@ SECTIONS
 #else
 	. = PAGE_OFFSET + TEXT_OFFSET;
 #endif
-	.text.head : {
-		_stext = .;
-		_sinittext = .;
-		*(.text.head)
-	}
 
 	.init : {			/* Init code and data		*/
+		_stext = .;
+		_sinittext = .;
+			HEAD_TEXT
 			INIT_TEXT
 		_einittext = .;
 		__proc_info_begin = .;
@@ -42,48 +40,36 @@ SECTIONS
 		__tagtable_begin = .;
 			*(.taglist.init)
 		__tagtable_end = .;
-		. = ALIGN(16);
-		__setup_start = .;
-			*(.init.setup)
-		__setup_end = .;
+
+		INIT_SETUP(16)
+
 		__early_begin = .;
 			*(.early_param.init)
 		__early_end = .;
-		__initcall_start = .;
-			INITCALLS
-		__initcall_end = .;
-		__con_initcall_start = .;
-			*(.con_initcall.init)
-		__con_initcall_end = .;
-		__security_initcall_start = .;
-			*(.security_initcall.init)
-		__security_initcall_end = .;
-#ifdef CONFIG_BLK_DEV_INITRD
-		. = ALIGN(32);
-		__initramfs_start = .;
-			usr/built-in.o(.init.ramfs)
-		__initramfs_end = .;
-#endif
-		. = ALIGN(PAGE_SIZE);
-		__per_cpu_load = .;
-		__per_cpu_start = .;
-			*(.data.percpu.page_aligned)
-			*(.data.percpu)
-			*(.data.percpu.shared_aligned)
-		__per_cpu_end = .;
+
+		INIT_CALLS
+		CON_INITCALL
+		SECURITY_INITCALL
+		INIT_RAM_FS
+
 #ifndef CONFIG_XIP_KERNEL
 		__init_begin = _stext;
 		INIT_DATA
-		. = ALIGN(PAGE_SIZE);
-		__init_end = .;
 #endif
 	}
 
-	/DISCARD/ : {			/* Exit code and data		*/
-		EXIT_TEXT
-		EXIT_DATA
-		*(.exitcall.exit)
-		*(.discard)
+	PERCPU(PAGE_SIZE)
+
+#ifndef CONFIG_XIP_KERNEL
+	. = ALIGN(PAGE_SIZE);
+	__init_end = .;
+#endif
+
+	/*
+	 * unwind exit sections must be discarded before the rest of the
+	 * unwind sections get included.
+	 */
+	/DISCARD/ : {
 		*(.ARM.exidx.exit.text)
 		*(.ARM.extab.exit.text)
 #ifndef CONFIG_HOTPLUG_CPU
@@ -157,7 +143,7 @@ SECTIONS
 		 * first, the init task union, aligned
 		 * to an 8192 byte boundary.
 		 */
-		*(.data.init_task)
+		INIT_TASK_DATA(THREAD_SIZE)
 
 #ifdef CONFIG_XIP_KERNEL
 		. = ALIGN(PAGE_SIZE);
@@ -167,17 +153,8 @@ SECTIONS
 		__init_end = .;
 #endif
 
-		. = ALIGN(PAGE_SIZE);
-		__nosave_begin = .;
-		*(.data.nosave)
-		. = ALIGN(PAGE_SIZE);
-		__nosave_end = .;
-
-		/*
-		 * then the cacheline aligned data
-		 */
-		. = ALIGN(32);
-		*(.data.cacheline_aligned)
+		NOSAVE_DATA
+		CACHELINE_ALIGNED_DATA(32)
 
 		/*
 		 * The exception fixup table (might need resorting at runtime)
@@ -256,21 +233,14 @@ SECTIONS
 	}
 #endif
 
-	.bss : {
-		__bss_start = .;	/* BSS				*/
-		*(.bss)
-		*(COMMON)
-		__bss_stop = .;
-		_end = .;
-	}
-					/* Stabs debugging sections.	*/
-	.stab 0 : { *(.stab) }
-	.stabstr 0 : { *(.stabstr) }
-	.stab.excl 0 : { *(.stab.excl) }
-	.stab.exclstr 0 : { *(.stab.exclstr) }
-	.stab.index 0 : { *(.stab.index) }
-	.stab.indexstr 0 : { *(.stab.indexstr) }
+	BSS_SECTION(0, 0, 0)
+	_end = .;
+
+	STABS_DEBUG
 	.comment 0 : { *(.comment) }
+
+	/* Default discards */
+	DISCARDS
 }
 
 /*