drivers: Remove CONFIG_OPROFILE support

The "oprofile" user-space tools don't use the kernel OPROFILE support
any more, and haven't in a long time. User-space has been converted to
the perf interfaces.

Remove kernel's old oprofile support.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Robert Richter <rric@kernel.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org> #RCU
Acked-by: William Cohen <wcohen@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Thomas Gleixner <tglx@linutronix.de>

24 files changed, 2 insertions, 3281 deletions

diff --git a/Documentation/RCU/NMI-RCU.rst b/Documentation/RCU/NMI-RCU.rst
index 180958388ff9..2a92bc685ef1 100644
--- a/Documentation/RCU/NMI-RCU.rst
+++ b/Documentation/RCU/NMI-RCU.rst
@@ -8,8 +8,7 @@ Although RCU is usually used to protect read-mostly data structures,
 it is possible to use RCU to provide dynamic non-maskable interrupt
 handlers, as well as dynamic irq handlers.  This document describes
 how to do this, drawing loosely from Zwane Mwaikambo's NMI-timer
-work in "arch/x86/oprofile/nmi_timer_int.c" and in
-"arch/x86/kernel/traps.c".
+work in "arch/x86/kernel/traps.c".
 
 The relevant pieces of code are listed below, each followed by a
 brief explanation::
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 9e3cdb271d06..e860c681766b 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3458,20 +3458,6 @@
 			For example, to override I2C bus2:
 			omap_mux=i2c2_scl.i2c2_scl=0x100,i2c2_sda.i2c2_sda=0x100
 
-	oprofile.timer=	[HW]
-			Use timer interrupt instead of performance counters
-
-	oprofile.cpu_type=	Force an oprofile cpu type
-			This might be useful if you have an older oprofile
-			userland or if you want common events.
-			Format: { arch_perfmon }
-			arch_perfmon: [X86] Force use of architectural
-				perfmon on Intel CPUs instead of the
-				CPU specific event set.
-			timer: [X86] Force use of architectural NMI
-				timer mode (see also oprofile.timer
-				for generic hr timer mode)
-
 	oops=panic	Always panic on oopses. Default is to just kill the
 			process, but there is a small probability of
 			deadlocking the machine.
diff --git a/Documentation/process/magic-number.rst b/Documentation/process/magic-number.rst
index e02ff5ffb653..c6dfe060ec2f 100644
--- a/Documentation/process/magic-number.rst
+++ b/Documentation/process/magic-number.rst
@@ -135,7 +135,6 @@ FW_HEADER_MAGIC       0x65726F66       fw_header                ``drivers/atm/fo
 SLOT_MAGIC            0x67267321       slot                     ``drivers/hotplug/cpqphp.h``
 SLOT_MAGIC            0x67267322       slot                     ``drivers/hotplug/acpiphp.h``
 LO_MAGIC              0x68797548       nbd_device               ``include/linux/nbd.h``
-OPROFILE_MAGIC        0x6f70726f       super_block              ``drivers/oprofile/oprofilefs.h``
 M3_STATE_MAGIC        0x734d724d       m3_state                 ``sound/oss/maestro3.c``
 VMALLOC_MAGIC         0x87654320       snd_alloc_track          ``sound/core/memory.c``
 KMALLOC_MAGIC         0x87654321       snd_alloc_track          ``sound/core/memory.c``
diff --git a/Documentation/translations/it_IT/process/magic-number.rst b/Documentation/translations/it_IT/process/magic-number.rst
index 0243d32a0b59..1af30f4228f2 100644
--- a/Documentation/translations/it_IT/process/magic-number.rst
+++ b/Documentation/translations/it_IT/process/magic-number.rst
@@ -141,7 +141,6 @@ FW_HEADER_MAGIC       0x65726F66       fw_header                ``drivers/atm/fo
 SLOT_MAGIC            0x67267321       slot                     ``drivers/hotplug/cpqphp.h``
 SLOT_MAGIC            0x67267322       slot                     ``drivers/hotplug/acpiphp.h``
 LO_MAGIC              0x68797548       nbd_device               ``include/linux/nbd.h``
-OPROFILE_MAGIC        0x6f70726f       super_block              ``drivers/oprofile/oprofilefs.h``
 M3_STATE_MAGIC        0x734d724d       m3_state                 ``sound/oss/maestro3.c``
 VMALLOC_MAGIC         0x87654320       snd_alloc_track          ``sound/core/memory.c``
 KMALLOC_MAGIC         0x87654321       snd_alloc_track          ``sound/core/memory.c``
diff --git a/Documentation/translations/zh_CN/process/magic-number.rst b/Documentation/translations/zh_CN/process/magic-number.rst
index de182bf4191c..7bb9d4165ed3 100644
--- a/Documentation/translations/zh_CN/process/magic-number.rst
+++ b/Documentation/translations/zh_CN/process/magic-number.rst
@@ -124,7 +124,6 @@ FW_HEADER_MAGIC       0x65726F66       fw_header                ``drivers/atm/fo
 SLOT_MAGIC            0x67267321       slot                     ``drivers/hotplug/cpqphp.h``
 SLOT_MAGIC            0x67267322       slot                     ``drivers/hotplug/acpiphp.h``
 LO_MAGIC              0x68797548       nbd_device               ``include/linux/nbd.h``
-OPROFILE_MAGIC        0x6f70726f       super_block              ``drivers/oprofile/oprofilefs.h``
 M3_STATE_MAGIC        0x734d724d       m3_state                 ``sound/oss/maestro3.c``
 VMALLOC_MAGIC         0x87654320       snd_alloc_track          ``sound/core/memory.c``
 KMALLOC_MAGIC         0x87654321       snd_alloc_track          ``sound/core/memory.c``
diff --git a/MAINTAINERS b/MAINTAINERS
index cc1e6a5ee6e6..ae2c2cef9d96 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1414,7 +1414,6 @@ F:	arch/arm*/include/asm/hw_breakpoint.h
 F:	arch/arm*/include/asm/perf_event.h
 F:	arch/arm*/kernel/hw_breakpoint.c
 F:	arch/arm*/kernel/perf_*
-F:	arch/arm/oprofile/common.c
 F:	drivers/perf/
 F:	include/linux/perf/arm_pmu.h
 
@@ -4083,7 +4082,6 @@ W:	http://www.ibm.com/developerworks/power/cell/
 F:	arch/powerpc/include/asm/cell*.h
 F:	arch/powerpc/include/asm/spu*.h
 F:	arch/powerpc/include/uapi/asm/spu*.h
-F:	arch/powerpc/oprofile/*cell*
 F:	arch/powerpc/platforms/cell/
 
 CELLWISE CW2015 BATTERY DRIVER
@@ -13311,15 +13309,6 @@ S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
 F:	sound/drivers/opl4/
 
-OPROFILE
-M:	Robert Richter <rric@kernel.org>
-L:	oprofile-list@lists.sf.net
-S:	Maintained
-F:	arch/*/include/asm/oprofile*.h
-F:	arch/*/oprofile/
-F:	drivers/oprofile/
-F:	include/linux/oprofile.h
-
 ORACLE CLUSTER FILESYSTEM 2 (OCFS2)
 M:	Mark Fasheh <mark@fasheh.com>
 M:	Joel Becker <jlbec@evilplan.org>
diff --git a/arch/Kconfig b/arch/Kconfig
index 24862d15f3a3..40277027a255 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -33,38 +33,6 @@ config HOTPLUG_SMT
 config GENERIC_ENTRY
        bool
 
-config OPROFILE
-	tristate "OProfile system profiling"
-	depends on PROFILING
-	depends on HAVE_OPROFILE
-	select RING_BUFFER
-	select RING_BUFFER_ALLOW_SWAP
-	help
-	  OProfile is a profiling system capable of profiling the
-	  whole system, include the kernel, kernel modules, libraries,
-	  and applications.
-
-	  If unsure, say N.
-
-config OPROFILE_EVENT_MULTIPLEX
-	bool "OProfile multiplexing support (EXPERIMENTAL)"
-	default n
-	depends on OPROFILE && X86
-	help
-	  The number of hardware counters is limited. The multiplexing
-	  feature enables OProfile to gather more events than counters
-	  are provided by the hardware. This is realized by switching
-	  between events at a user specified time interval.
-
-	  If unsure, say N.
-
-config HAVE_OPROFILE
-	bool
-
-config OPROFILE_NMI_TIMER
-	def_bool y
-	depends on PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !PPC64
-
 config KPROBES
 	bool "Kprobes"
 	depends on MODULES
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
deleted file mode 100644
index cc917865f13a..000000000000
--- a/drivers/oprofile/buffer_sync.c
+++ /dev/null
@@ -1,591 +0,0 @@
-/**
- * @file buffer_sync.c
- *
- * @remark Copyright 2002-2009 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <levon@movementarian.org>
- * @author Barry Kasindorf
- * @author Robert Richter <robert.richter@amd.com>
- *
- * This is the core of the buffer management. Each
- * CPU buffer is processed and entered into the
- * global event buffer. Such processing is necessary
- * in several circumstances, mentioned below.
- *
- * The processing does the job of converting the
- * transitory EIP value into a persistent dentry/offset
- * value that the profiler can record at its leisure.
- *
- * See fs/dcookies.c for a description of the dentry/offset
- * objects.
- */
-
-#include <linux/file.h>
-#include <linux/mm.h>
-#include <linux/workqueue.h>
-#include <linux/notifier.h>
-#include <linux/dcookies.h>
-#include <linux/profile.h>
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/oprofile.h>
-#include <linux/sched.h>
-#include <linux/sched/mm.h>
-#include <linux/sched/task.h>
-#include <linux/gfp.h>
-
-#include "oprofile_stats.h"
-#include "event_buffer.h"
-#include "cpu_buffer.h"
-#include "buffer_sync.h"
-
-static LIST_HEAD(dying_tasks);
-static LIST_HEAD(dead_tasks);
-static cpumask_var_t marked_cpus;
-static DEFINE_SPINLOCK(task_mortuary);
-static void process_task_mortuary(void);
-
-/* Take ownership of the task struct and place it on the
- * list for processing. Only after two full buffer syncs
- * does the task eventually get freed, because by then
- * we are sure we will not reference it again.
- * Can be invoked from softirq via RCU callback due to
- * call_rcu() of the task struct, hence the _irqsave.
- */
-static int
-task_free_notify(struct notifier_block *self, unsigned long val, void *data)
-{
-	unsigned long flags;
-	struct task_struct *task = data;
-	spin_lock_irqsave(&task_mortuary, flags);
-	list_add(&task->tasks, &dying_tasks);
-	spin_unlock_irqrestore(&task_mortuary, flags);
-	return NOTIFY_OK;
-}
-
-
-/* The task is on its way out. A sync of the buffer means we can catch
- * any remaining samples for this task.
- */
-static int
-task_exit_notify(struct notifier_block *self, unsigned long val, void *data)
-{
-	/* To avoid latency problems, we only process the current CPU,
-	 * hoping that most samples for the task are on this CPU
-	 */
-	sync_buffer(raw_smp_processor_id());
-	return 0;
-}
-
-
-/* The task is about to try a do_munmap(). We peek at what it's going to
- * do, and if it's an executable region, process the samples first, so
- * we don't lose any. This does not have to be exact, it's a QoI issue
- * only.
- */
-static int
-munmap_notify(struct notifier_block *self, unsigned long val, void *data)
-{
-	unsigned long addr = (unsigned long)data;
-	struct mm_struct *mm = current->mm;
-	struct vm_area_struct *mpnt;
-
-	mmap_read_lock(mm);
-
-	mpnt = find_vma(mm, addr);
-	if (mpnt && mpnt->vm_file && (mpnt->vm_flags & VM_EXEC)) {
-		mmap_read_unlock(mm);
-		/* To avoid latency problems, we only process the current CPU,
-		 * hoping that most samples for the task are on this CPU
-		 */
-		sync_buffer(raw_smp_processor_id());
-		return 0;
-	}
-
-	mmap_read_unlock(mm);
-	return 0;
-}
-
-
-/* We need to be told about new modules so we don't attribute to a previously
- * loaded module, or drop the samples on the floor.
- */
-static int
-module_load_notify(struct notifier_block *self, unsigned long val, void *data)
-{
-#ifdef CONFIG_MODULES
-	if (val != MODULE_STATE_COMING)
-		return NOTIFY_DONE;
-
-	/* FIXME: should we process all CPU buffers ? */
-	mutex_lock(&buffer_mutex);
-	add_event_entry(ESCAPE_CODE);
-	add_event_entry(MODULE_LOADED_CODE);
-	mutex_unlock(&buffer_mutex);
-#endif
-	return NOTIFY_OK;
-}
-
-
-static struct notifier_block task_free_nb = {
-	.notifier_call	= task_free_notify,
-};
-
-static struct notifier_block task_exit_nb = {
-	.notifier_call	= task_exit_notify,
-};
-
-static struct notifier_block munmap_nb = {
-	.notifier_call	= munmap_notify,
-};
-
-static struct notifier_block module_load_nb = {
-	.notifier_call = module_load_notify,
-};
-
-static void free_all_tasks(void)
-{
-	/* make sure we don't leak task structs */
-	process_task_mortuary();
-	process_task_mortuary();
-}
-
-int sync_start(void)
-{
-	int err;
-
-	if (!zalloc_cpumask_var(&marked_cpus, GFP_KERNEL))
-		return -ENOMEM;
-
-	err = task_handoff_register(&task_free_nb);
-	if (err)
-		goto out1;
-	err = profile_event_register(PROFILE_TASK_EXIT, &task_exit_nb);
-	if (err)
-		goto out2;
-	err = profile_event_register(PROFILE_MUNMAP, &munmap_nb);
-	if (err)
-		goto out3;
-	err = register_module_notifier(&module_load_nb);
-	if (err)
-		goto out4;
-
-	start_cpu_work();
-
-out:
-	return err;
-out4:
-	profile_event_unregister(PROFILE_MUNMAP, &munmap_nb);
-out3:
-	profile_event_unregister(PROFILE_TASK_EXIT, &task_exit_nb);
-out2:
-	task_handoff_unregister(&task_free_nb);
-	free_all_tasks();
-out1:
-	free_cpumask_var(marked_cpus);
-	goto out;
-}
-
-
-void sync_stop(void)
-{
-	end_cpu_work();
-	unregister_module_notifier(&module_load_nb);
-	profile_event_unregister(PROFILE_MUNMAP, &munmap_nb);
-	profile_event_unregister(PROFILE_TASK_EXIT, &task_exit_nb);
-	task_handoff_unregister(&task_free_nb);
-	barrier();			/* do all of the above first */
-
-	flush_cpu_work();
-
-	free_all_tasks();
-	free_cpumask_var(marked_cpus);
-}
-
-
-/* Optimisation. We can manage without taking the dcookie sem
- * because we cannot reach this code without at least one
- * dcookie user still being registered (namely, the reader
- * of the event buffer). */
-static inline unsigned long fast_get_dcookie(const struct path *path)
-{
-	unsigned long cookie;
-
-	if (path->dentry->d_flags & DCACHE_COOKIE)
-		return (unsigned long)path->dentry;
-	get_dcookie(path, &cookie);
-	return cookie;
-}
-
-
-/* Look up the dcookie for the task's mm->exe_file,
- * which corresponds loosely to "application name". This is
- * not strictly necessary but allows oprofile to associate
- * shared-library samples with particular applications
- */
-static unsigned long get_exec_dcookie(struct mm_struct *mm)
-{
-	unsigned long cookie = NO_COOKIE;
-	struct file *exe_file;
-
-	if (!mm)
-		goto done;
-
-	exe_file = get_mm_exe_file(mm);
-	if (!exe_file)
-		goto done;
-
-	cookie = fast_get_dcookie(&exe_file->f_path);
-	fput(exe_file);
-done:
-	return cookie;
-}
-
-
-/* Convert the EIP value of a sample into a persistent dentry/offset
- * pair that can then be added to the global event buffer. We make
- * sure to do this lookup before a mm->mmap modification happens so
- * we don't lose track.
- *
- * The caller must ensure the mm is not nil (ie: not a kernel thread).
- */
-static unsigned long
-lookup_dcookie(struct mm_struct *mm, unsigned long addr, off_t *offset)
-{
-	unsigned long cookie = NO_COOKIE;
-	struct vm_area_struct *vma;
-
-	mmap_read_lock(mm);
-	for (vma = find_vma(mm, addr); vma; vma = vma->vm_next) {
-
-		if (addr < vma->vm_start || addr >= vma->vm_end)
-			continue;
-
-		if (vma->vm_file) {
-			cookie = fast_get_dcookie(&vma->vm_file->f_path);
-			*offset = (vma->vm_pgoff << PAGE_SHIFT) + addr -
-				vma->vm_start;
-		} else {
-			/* must be an anonymous map */
-			*offset = addr;
-		}
-
-		break;
-	}
-
-	if (!vma)
-		cookie = INVALID_COOKIE;
-	mmap_read_unlock(mm);
-
-	return cookie;
-}
-
-static unsigned long last_cookie = INVALID_COOKIE;
-
-static void add_cpu_switch(int i)
-{
-	add_event_entry(ESCAPE_CODE);
-	add_event_entry(CPU_SWITCH_CODE);
-	add_event_entry(i);
-	last_cookie = INVALID_COOKIE;
-}
-
-static void add_kernel_ctx_switch(unsigned int in_kernel)
-{
-	add_event_entry(ESCAPE_CODE);
-	if (in_kernel)
-		add_event_entry(KERNEL_ENTER_SWITCH_CODE);
-	else
-		add_event_entry(KERNEL_EXIT_SWITCH_CODE);
-}
-
-static void
-add_user_ctx_switch(struct task_struct const *task, unsigned long cookie)
-{
-	add_event_entry(ESCAPE_CODE);
-	add_event_entry(CTX_SWITCH_CODE);
-	add_event_entry(task->pid);
-	add_event_entry(cookie);
-	/* Another code for daemon back-compat */
-	add_event_entry(ESCAPE_CODE);
-	add_event_entry(CTX_TGID_CODE);
-	add_event_entry(task->tgid);
-}
-
-
-static void add_cookie_switch(unsigned long cookie)
-{
-	add_event_entry(ESCAPE_CODE);
-	add_event_entry(COOKIE_SWITCH_CODE);
-	add_event_entry(cookie);
-}
-
-
-static void add_trace_begin(void)
-{
-	add_event_entry(ESCAPE_CODE);
-	add_event_entry(TRACE_BEGIN_CODE);
-}
-
-static void add_data(struct op_entry *entry, struct mm_struct *mm)
-{
-	unsigned long code, pc, val;
-	unsigned long cookie;
-	off_t offset;
-
-	if (!op_cpu_buffer_get_data(entry, &code))
-		return;
-	if (!op_cpu_buffer_get_data(entry, &pc))
-		return;
-	if (!op_cpu_buffer_get_size(entry))
-		return;
-
-	if (mm) {
-		cookie = lookup_dcookie(mm, pc, &offset);
-
-		if (cookie == NO_COOKIE)
-			offset = pc;
-		if (cookie == INVALID_COOKIE) {
-			atomic_inc(&oprofile_stats.sample_lost_no_mapping);
-			offset = pc;
-		}
-		if (cookie != last_cookie) {
-			add_cookie_switch(cookie);
-			last_cookie = cookie;
-		}
-	} else
-		offset = pc;
-
-	add_event_entry(ESCAPE_CODE);
-	add_event_entry(code);
-	add_event_entry(offset);	/* Offset from Dcookie */
-
-	while (op_cpu_buffer_get_data(entry, &val))
-		add_event_entry(val);
-}
-
-static inline void add_sample_entry(unsigned long offset, unsigned long event)
-{
-	add_event_entry(offset);
-	add_event_entry(event);
-}
-
-
-/*
- * Add a sample to the global event buffer. If possible the
- * sample is converted into a persistent dentry/offset pair
- * for later lookup from userspace. Return 0 on failure.
- */
-static int
-add_sample(struct mm_struct *mm, struct op_sample *s, int in_kernel)
-{
-	unsigned long cookie;
-	off_t offset;
-
-	if (in_kernel) {
-		add_sample_entry(s->eip, s->event);
-		return 1;
-	}
-
-	/* add userspace sample */
-
-	if (!mm) {
-		atomic_inc(&oprofile_stats.sample_lost_no_mm);
-		return 0;
-	}
-
-	cookie = lookup_dcookie(mm, s->eip, &offset);
-
-	if (cookie == INVALID_COOKIE) {
-		atomic_inc(&oprofile_stats.sample_lost_no_mapping);
-		return 0;
-	}
-
-	if (cookie != last_cookie) {
-		add_cookie_switch(cookie);
-		last_cookie = cookie;
-	}
-
-	add_sample_entry(offset, s->event);
-
-	return 1;
-}
-
-
-static void release_mm(struct mm_struct *mm)
-{
-	if (!mm)
-		return;
-	mmput(mm);
-}
-
-static inline int is_code(unsigned long val)
-{
-	return val == ESCAPE_CODE;
-}
-
-
-/* Move tasks along towards death. Any tasks on dead_tasks
- * will definitely have no remaining references in any
- * CPU buffers at this point, because we use two lists,
- * and to have reached the list, it must have gone through
- * one full sync already.
- */
-static void process_task_mortuary(void)
-{
-	unsigned long flags;
-	LIST_HEAD(local_dead_tasks);
-	struct task_struct *task;
-	struct task_struct *ttask;
-
-	spin_lock_irqsave(&task_mortuary, flags);
-
-	list_splice_init(&dead_tasks, &local_dead_tasks);
-	list_splice_init(&dying_tasks, &dead_tasks);
-
-	spin_unlock_irqrestore(&task_mortuary, flags);
-
-	list_for_each_entry_safe(task, ttask, &local_dead_tasks, tasks) {
-		list_del(&task->tasks);
-		free_task(task);
-	}
-}
-
-
-static void mark_done(int cpu)
-{
-	int i;
-
-	cpumask_set_cpu(cpu, marked_cpus);
-
-	for_each_online_cpu(i) {
-		if (!cpumask_test_cpu(i, marked_cpus))
-			return;
-	}
-
-	/* All CPUs have been processed at least once,
-	 * we can process the mortuary once
-	 */
-	process_task_mortuary();
-
-	cpumask_clear(marked_cpus);
-}
-
-
-/* FIXME: this is not sufficient if we implement syscall barrier backtrace
- * traversal, the code switch to sb_sample_start at first kernel enter/exit
- * switch so we need a fifth state and some special handling in sync_buffer()
- */
-typedef enum {
-	sb_bt_ignore = -2,
-	sb_buffer_start,
-	sb_bt_start,
-	sb_sample_start,
-} sync_buffer_state;
-
-/* Sync one of the CPU's buffers into the global event buffer.
- * Here we need to go through each batch of samples punctuated
- * by context switch notes, taking the task's mmap_lock and doing
- * lookup in task->mm->mmap to convert EIP into dcookie/offset
- * value.
- */
-void sync_buffer(int cpu)
-{
-	struct mm_struct *mm = NULL;
-	struct mm_struct *oldmm;
-	unsigned long val;
-	struct task_struct *new;
-	unsigned long cookie = 0;
-	int in_kernel = 1;
-	sync_buffer_state state = sb_buffer_start;
-	unsigned int i;
-	unsigned long available;
-	unsigned long flags;
-	struct op_entry entry;
-	struct op_sample *sample;
-
-	mutex_lock(&buffer_mutex);
-
-	add_cpu_switch(cpu);
-
-	op_cpu_buffer_reset(cpu);
-	available = op_cpu_buffer_entries(cpu);
-
-	for (i = 0; i < available; ++i) {
-		sample = op_cpu_buffer_read_entry(&entry, cpu);
-		if (!sample)
-			break;
-
-		if (is_code(sample->eip)) {
-			flags = sample->event;
-			if (flags & TRACE_BEGIN) {
-				state = sb_bt_start;
-				add_trace_begin();
-			}
-			if (flags & KERNEL_CTX_SWITCH) {
-				/* kernel/userspace switch */
-				in_kernel = flags & IS_KERNEL;
-				if (state == sb_buffer_start)
-					state = sb_sample_start;
-				add_kernel_ctx_switch(flags & IS_KERNEL);
-			}
-			if (flags & USER_CTX_SWITCH
-			    && op_cpu_buffer_get_data(&entry, &val)) {
-				/* userspace context switch */
-				new = (struct task_struct *)val;
-				oldmm = mm;
-				release_mm(oldmm);
-				mm = get_task_mm(new);
-				if (mm != oldmm)
-					cookie = get_exec_dcookie(mm);
-				add_user_ctx_switch(new, cookie);
-			}
-			if (op_cpu_buffer_get_size(&entry))
-				add_data(&entry, mm);
-			continue;
-		}
-
-		if (state < sb_bt_start)
-			/* ignore sample */
-			continue;
-
-		if (add_sample(mm, sample, in_kernel))
-			continue;
-
-		/* ignore backtraces if failed to add a sample */
-		if (state == sb_bt_start) {
-			state = sb_bt_ignore;
-			atomic_inc(&oprofile_stats.bt_lost_no_mapping);
-		}
-	}
-	release_mm(mm);
-
-	mark_done(cpu);
-
-	mutex_unlock(&buffer_mutex);
-}
-
-/* The function can be used to add a buffer worth of data directly to
- * the kernel buffer. The buffer is assumed to be a circular buffer.
- * Take the entries from index start and end at index end, wrapping
- * at max_entries.
- */
-void oprofile_put_buff(unsigned long *buf, unsigned int start,
-		       unsigned int stop, unsigned int max)
-{
-	int i;
-
-	i = start;
-
-	mutex_lock(&buffer_mutex);
-	while (i != stop) {
-		add_event_entry(buf[i++]);
-
-		if (i >= max)
-			i = 0;
-	}
-
-	mutex_unlock(&buffer_mutex);
-}
-
diff --git a/drivers/oprofile/buffer_sync.h b/drivers/oprofile/buffer_sync.h
deleted file mode 100644
index 3110732c1835..000000000000
--- a/drivers/oprofile/buffer_sync.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/**
- * @file buffer_sync.h
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <levon@movementarian.org>
- */
-
-#ifndef OPROFILE_BUFFER_SYNC_H
-#define OPROFILE_BUFFER_SYNC_H
-
-/* add the necessary profiling hooks */
-int sync_start(void);
-
-/* remove the hooks */
-void sync_stop(void);
-
-/* sync the given CPU's buffer */
-void sync_buffer(int cpu);
-
-#endif /* OPROFILE_BUFFER_SYNC_H */
diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c
deleted file mode 100644
index 9210a95cb4e6..000000000000
--- a/drivers/oprofile/cpu_buffer.c
+++ /dev/null
@@ -1,465 +0,0 @@
-/**
- * @file cpu_buffer.c
- *
- * @remark Copyright 2002-2009 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <levon@movementarian.org>
- * @author Barry Kasindorf <barry.kasindorf@amd.com>
- * @author Robert Richter <robert.richter@amd.com>
- *
- * Each CPU has a local buffer that stores PC value/event
- * pairs. We also log context switches when we notice them.
- * Eventually each CPU's buffer is processed into the global
- * event buffer by sync_buffer().
- *
- * We use a local buffer for two reasons: an NMI or similar
- * interrupt cannot synchronise, and high sampling rates
- * would lead to catastrophic global synchronisation if
- * a global buffer was used.
- */
-
-#include <linux/sched.h>
-#include <linux/oprofile.h>
-#include <linux/errno.h>
-
-#include <asm/ptrace.h>
-
-#include "event_buffer.h"
-#include "cpu_buffer.h"
-#include "buffer_sync.h"
-#include "oprof.h"
-
-#define OP_BUFFER_FLAGS	0
-
-static struct trace_buffer *op_ring_buffer;
-DEFINE_PER_CPU(struct oprofile_cpu_buffer, op_cpu_buffer);
-
-static void wq_sync_buffer(struct work_struct *work);
-
-#define DEFAULT_TIMER_EXPIRE (HZ / 10)
-static int work_enabled;
-
-unsigned long oprofile_get_cpu_buffer_size(void)
-{
-	return oprofile_cpu_buffer_size;
-}
-
-void oprofile_cpu_buffer_inc_smpl_lost(void)
-{
-	struct oprofile_cpu_buffer *cpu_buf = this_cpu_ptr(&op_cpu_buffer);
-
-	cpu_buf->sample_lost_overflow++;
-}
-
-void free_cpu_buffers(void)
-{
-	if (op_ring_buffer)
-		ring_buffer_free(op_ring_buffer);
-	op_ring_buffer = NULL;
-}
-
-#define RB_EVENT_HDR_SIZE 4
-
-int alloc_cpu_buffers(void)
-{
-	int i;
-
-	unsigned long buffer_size = oprofile_cpu_buffer_size;
-	unsigned long byte_size = buffer_size * (sizeof(struct op_sample) +
-						 RB_EVENT_HDR_SIZE);
-
-	op_ring_buffer = ring_buffer_alloc(byte_size, OP_BUFFER_FLAGS);
-	if (!op_ring_buffer)
-		goto fail;
-
-	for_each_possible_cpu(i) {
-		struct oprofile_cpu_buffer *b = &per_cpu(op_cpu_buffer, i);
-
-		b->last_task = NULL;
-		b->last_is_kernel = -1;
-		b->tracing = 0;
-		b->buffer_size = buffer_size;
-		b->sample_received = 0;
-		b->sample_lost_overflow = 0;
-		b->backtrace_aborted = 0;
-		b->sample_invalid_eip = 0;
-		b->cpu = i;
-		INIT_DELAYED_WORK(&b->work, wq_sync_buffer);
-	}
-	return 0;
-
-fail:
-	free_cpu_buffers();
-	return -ENOMEM;
-}
-
-void start_cpu_work(void)
-{
-	int i;
-
-	work_enabled = 1;
-
-	for_each_online_cpu(i) {
-		struct oprofile_cpu_buffer *b = &per_cpu(op_cpu_buffer, i);
-
-		/*
-		 * Spread the work by 1 jiffy per cpu so they dont all
-		 * fire at once.
-		 */
-		schedule_delayed_work_on(i, &b->work, DEFAULT_TIMER_EXPIRE + i);
-	}
-}
-
-void end_cpu_work(void)
-{
-	work_enabled = 0;
-}
-
-void flush_cpu_work(void)
-{
-	int i;
-
-	for_each_online_cpu(i) {
-		struct oprofile_cpu_buffer *b = &per_cpu(op_cpu_buffer, i);
-
-		/* these works are per-cpu, no need for flush_sync */
-		flush_delayed_work(&b->work);
-	}
-}
-
-/*
- * This function prepares the cpu buffer to write a sample.
- *
- * Struct op_entry is used during operations on the ring buffer while
- * struct op_sample contai