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>

15 files changed, 0 insertions, 3009 deletions

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 contains the data that is stored in the ring
- * buffer. Struct entry can be uninitialized. The function reserves a
- * data array that is specified by size. Use
- * op_cpu_buffer_write_commit() after preparing the sample. In case of
- * errors a null pointer is returned, otherwise the pointer to the
- * sample.
- *
- */
-struct op_sample
-*op_cpu_buffer_write_reserve(struct op_entry *entry, unsigned long size)
-{
-	entry->event = ring_buffer_lock_reserve
-		(op_ring_buffer, sizeof(struct op_sample) +
-		 size * sizeof(entry->sample->data[0]));
-	if (!entry->event)
-		return NULL;
-	entry->sample = ring_buffer_event_data(entry->event);
-	entry->size = size;
-	entry->data = entry->sample->data;
-
-	return entry->sample;
-}
-
-int op_cpu_buffer_write_commit(struct op_entry *entry)
-{
-	return ring_buffer_unlock_commit(op_ring_buffer, entry->event);
-}
-
-struct op_sample *op_cpu_buffer_read_entry(struct op_entry *entry, int cpu)
-{
-	struct ring_buffer_event *e;
-	e = ring_buffer_consume(op_ring_buffer, cpu, NULL, NULL);
-	if (!e)
-		return NULL;
-
-	entry->event = e;
-	entry->sample = ring_buffer_event_data(e);
-	entry->size = (ring_buffer_event_length(e) - sizeof(struct op_sample))
-		/ sizeof(entry->sample->data[0]);
-	entry->data = entry->sample->data;
-	return entry->sample;
-}
-
-unsigned long op_cpu_buffer_entries(int cpu)
-{
-	return ring_buffer_entries_cpu(op_ring_buffer, cpu);
-}
-
-static int
-op_add_code(struct oprofile_cpu_buffer *cpu_buf, unsigned long backtrace,
-	    int is_kernel, struct task_struct *task)
-{
-	struct op_entry entry;
-	struct op_sample *sample;
-	unsigned long flags;
-	int size;
-
-	flags = 0;
-
-	if (backtrace)
-		flags |= TRACE_BEGIN;
-
-	/* notice a switch from user->kernel or vice versa */
-	is_kernel = !!is_kernel;
-	if (cpu_buf->last_is_kernel != is_kernel) {
-		cpu_buf->last_is_kernel = is_kernel;
-		flags |= KERNEL_CTX_SWITCH;
-		if (is_kernel)
-			flags |= IS_KERNEL;
-	}
-
-	/* notice a task switch */
-	if (cpu_buf->last_task != task) {
-		cpu_buf->last_task = task;
-		flags |= USER_CTX_SWITCH;
-	}
-
-	if (!flags)
-		/* nothing to do */
-		return 0;
-
-	if (flags & USER_CTX_SWITCH)
-		size = 1;
-	else
-		size = 0;
-
-	sample = op_cpu_buffer_write_reserve(&entry, size);
-	if (!sample)
-		return -ENOMEM;
-
-	sample->eip = ESCAPE_CODE;
-	sample->event = flags;
-
-	if (size)
-		op_cpu_buffer_add_data(&entry, (unsigned long)task);
-
-	op_cpu_buffer_write_commit(&entry);
-
-	return 0;
-}
-
-static inline int
-op_add_sample(struct oprofile_cpu_buffer *cpu_buf,
-	      unsigned long pc, unsigned long event)
-{
-	struct op_entry entry;
-	struct op_sample *sample;
-
-	sample = op_cpu_buffer_write_reserve(&entry, 0);
-	if (!sample)
-		return -ENOMEM;
-
-	sample->eip = pc;
-	sample->event = event;
-
-	return op_cpu_buffer_write_commit(&entry);
-}
-
-/*
- * This must be safe from any context.
- *
- * is_kernel is needed because on some architectures you cannot
- * tell if you are in kernel or user space simply by looking at
- * pc. We tag this in the buffer by generating kernel enter/exit
- * events whenever is_kernel changes
- */
-static int
-log_sample(struct oprofile_cpu_buffer *cpu_buf, unsigned long pc,
-	   unsigned long backtrace, int is_kernel, unsigned long event,
-	   struct task_struct *task)
-{
-	struct task_struct *tsk = task ? task : current;
-	cpu_buf->sample_received++;
-
-	if (pc == ESCAPE_CODE) {
-		cpu_buf->sample_invalid_eip++;
-		return 0;
-	}
-
-	if (op_add_code(cpu_buf, backtrace, is_kernel, tsk))
-		goto fail;
-
-	if (op_add_sample(cpu_buf, pc, event))
-		goto fail;
-
-	return 1;
-
-fail:
-	cpu_buf->sample_lost_overflow++;
-	return 0;
-}
-
-static inline void oprofile_begin_trace(struct oprofile_cpu_buffer *cpu_buf)
-{
-	cpu_buf->tracing = 1;
-}
-
-static inline void oprofile_end_trace(struct oprofile_cpu_buffer *cpu_buf)
-{
-	cpu_buf->tracing = 0;
-}
-
-static inline void
-__oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
-			  unsigned long event, int is_kernel,
-			  struct task_struct *task)
-{
-	struct oprofile_cpu_buffer *cpu_buf = this_cpu_ptr(&op_cpu_buffer);
-	unsigned long backtrace = oprofile_backtrace_depth;
-
-	/*
-	 * if log_sample() fail we can't backtrace since we lost the
-	 * source of this event
-	 */
-	if (!log_sample(cpu_buf, pc, backtrace, is_kernel, event, task))
-		/* failed */
-		return;
-
-	if (!backtrace)
-		return;
-
-	oprofile_begin_trace(cpu_buf);
-	oprofile_ops.backtrace(regs, backtrace);
-	oprofile_end_trace(cpu_buf);
-}
-
-void oprofile_add_ext_hw_sample(unsigned long pc, struct pt_regs * const regs,
-				unsigned long event, int is_kernel,
-				struct task_struct *task)
-{
-	__oprofile_add_ext_sample(pc, regs, event, is_kernel, task);
-}
-
-void oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
-			     unsigned long event, int is_kernel)
-{
-	__oprofile_add_ext_sample(pc, regs, event, is_kernel, NULL);
-}
-
-void oprofile_add_sample(struct pt_regs * const regs, unsigned long event)
-{
-	int is_kernel;
-	unsigned long pc;
-
-	if (likely(regs)) {
-		is_kernel = !user_mode(regs);
-		pc = profile_pc(regs);
-	} else {
-		is_kernel = 0;    /* This value will not be used */
-		pc = ESCAPE_CODE; /* as this causes an early return. */
-	}
-
-	__oprofile_add_ext_sample(pc, regs, event, is_kernel, NULL);
-}
-
-/*
- * Add samples with data to the ring buffer.
- *
- * Use oprofile_add_data(&entry, val) to add data and
- * oprofile_write_commit(&entry) to commit the sample.
- */
-void
-oprofile_write_reserve(struct op_entry *entry, struct pt_regs * const regs,
-		       unsigned long pc, int code, int size)
-{
-	struct op_sample *sample;
-	int is_kernel = !user_mode(regs);
-	struct oprofile_cpu_buffer *cpu_buf = this_cpu_ptr(&op_cpu_buffer);
-
-	cpu_buf->sample_received++;
-
-	/* no backtraces for samples with data */
-	if (op_add_code(cpu_buf, 0, is_kernel, current))
-		goto fail;
-
-	sample = op_cpu_buffer_write_reserve(entry, size + 2);
-	if (!sample)
-		goto fail;
-	sample->eip = ESCAPE_CODE;
-	sample->event = 0;		/* no flags */
-
-	op_cpu_buffer_add_data(entry, code);
-	op_cpu_buffer_add_data(entry, pc);
-
-	return;
-
-fail:
-	entry->event = NULL;
-	cpu_buf->sample_lost_overflow++;
-}
-
-int oprofile_add_data(struct op_entry *entry, unsigned long val)
-{
-	if (!entry->event)
-		return 0;
-	return op_cpu_buffer_add_data(entry, val);
-}
-
-int oprofile_add_data64(struct op_entry *entry, u64 val)
-{
-	if (!entry->event)
-		return 0;
-	if (op_cpu_buffer_get_size(entry) < 2)
-		/*
-		 * the function returns 0 to indicate a too small
-		 * buffer, even if there is some space left
-		 */
-		return 0;
-	if (!op_cpu_buffer_add_data(entry, (u32)val))
-		return 0;
-	return op_cpu_buffer_add_data(entry, (u32)(val >> 32));
-}
-
-int oprofile_write_commit(struct op_entry *entry)
-{
-	if (!entry->event)
-		return -EINVAL;
-	return op_cpu_buffer_write_commit(entry);
-}
-
-void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event)
-{
-	struct oprofile_cpu_buffer *cpu_buf = this_cpu_ptr(&op_cpu_buffer);
-	log_sample(cpu_buf, pc, 0, is_kernel, event, NULL);
-}
-
-void oprofile_add_trace(unsigned long pc)
-{
-	struct oprofile_cpu_buffer *cpu_buf = this_cpu_ptr(&op_cpu_buffer);
-
-	if (!cpu_buf->tracing)
-		return;
-
-	/*
-	 * broken frame can give an eip with the same value as an
-	 * escape code, abort the trace if we get it
-	 */
-	if (pc == ESCAPE_CODE)
-		goto fail;
-
-	if (op_add_sample(cpu_buf, pc, 0))
-		goto fail;
-
-	return;
-fail:
-	cpu_buf->tracing = 0;
-	cpu_buf->backtrace_aborted++;
-	return;
-}
-
-/*
- * This serves to avoid cpu buffer overflow, and makes sure
- * the task mortuary progresses
- *
- * By using schedule_delayed_work_on and then schedule_delayed_work
- * we guarantee this will stay on the correct cpu
- */
-static void wq_sync_buffer(struct work_struct *work)
-{
-	struct oprofile_cpu_buffer *b =
-		container_of(work, struct oprofile_cpu_buffer, work.work);
-	if (b->cpu != smp_processor_id() && !cpu_online(b->cpu)) {
-		cancel_delayed_work(&b->work);
-		return;
-	}
-	sync_buffer(b->cpu);
-
-	/* don't re-add the work if we're shutting down */
-	if (work_enabled)
-		schedule_delayed_work(&b->work, DEFAULT_TIMER_EXPIRE);
-}
diff --git a/drivers/oprofile/cpu_buffer.h b/drivers/oprofile/cpu_buffer.h
deleted file mode 100644
index 31478c0cff87..000000000000
--- a/drivers/oprofile/cpu_buffer.h
+++ /dev/null
@@ -1,121 +0,0 @@
-/**
- * @file cpu_buffer.h
- *
- * @remark Copyright 2002-2009 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <levon@movementarian.org>
- * @author Robert Richter <robert.richter@amd.com>
- */
-
-#ifndef OPROFILE_CPU_BUFFER_H
-#define OPROFILE_CPU_BUFFER_H
-
-#include <linux/types.h>
-#include <linux/spinlock.h>
-#include <linux/workqueue.h>
-#include <linux/cache.h>
-#include <linux/sched.h>
-#include <linux/ring_buffer.h>
-
-struct task_struct;
-
-int alloc_cpu_buffers(void);
-void free_cpu_buffers(void);
-
-void start_cpu_work(void);
-void end_cpu_work(void);
-void flush_cpu_work(void);
-
-/* CPU buffer is composed of such entries (which are
- * also used for context switch notes)
- */
-struct op_sample {
-	unsigned long eip;
-	unsigned long event;
-	unsigned long data[];
-};
-
-struct op_entry;
-
-struct oprofile_cpu_buffer {
-	unsigned long buffer_size;
-	struct task_struct *last_task;
-	int last_is_kernel;
-	int tracing;
-	unsigned long sample_received;
-	unsigned long sample_lost_overflow;
-	unsigned long backtrace_aborted;
-	unsigned long sample_invalid_eip;
-	int cpu;
-	struct delayed_work work;
-};
-
-DECLARE_PER_CPU(struct oprofile_cpu_buffer, op_cpu_buffer);
-
-/*
- * Resets the cpu buffer to a sane state.
- *
- * reset these to invalid values; the next sample collected will
- * populate the buffer with proper values to initialize the buffer
- */
-static inline void op_cpu_buffer_reset(int cpu)
-{
-	struct oprofile_cpu_buffer *cpu_buf = &per_cpu(op_cpu_buffer, cpu);
-
-	cpu_buf->last_is_kernel = -1;
-	cpu_buf->last_task = NULL;
-}
-
-/*
- * op_cpu_buffer_add_data() and op_cpu_buffer_write_commit() may be
- * called only if op_cpu_buffer_write_reserve() did not return NULL or
- * entry->event != NULL, otherwise entry->size or entry->event will be
- * used uninitialized.
- */
-
-struct op_sample
-*op_cpu_buffer_write_reserve(struct op_entry *entry, unsigned long size);
-int op_cpu_buffer_write_commit(struct op_entry *entry);
-struct op_sample *op_cpu_buffer_read_entry(struct op_entry *entry, int cpu);
-unsigned long op_cpu_buffer_entries(int cpu);
-
-/* returns the remaining free size of data in the entry */
-static inline
-int op_cpu_buffer_add_data(struct op_entry *entry, unsigned long val)
-{
-	if (!entry->size)
-		return 0;
-	*entry->data = val;
-	entry->size--;
-	entry->data++;
-	return entry->size;
-}
-
-/* returns the size of data in the entry */
-static inline
-int op_cpu_buffer_get_size(struct op_entry *entry)
-{
-	return entry->size;
-}
-
-/* returns 0 if empty or the size of data including the current value */
-static inline
-int op_cpu_buffer_get_data(struct op_entry *entry, unsigned long *val)
-{
-	int size = entry->size;
-	if (!size)
-		return 0;
-	*val = *entry->data;
-	entry->size--;
-	entry->data++;
-	return size;
-}
-
-/* extra data flags */
-#define KERNEL_CTX_SWITCH	(1UL << 0)
-#define IS_KERNEL		(1UL << 1)
-#define TRACE_BEGIN		(1UL << 2)
-#define USER_CTX_SWITCH		(1UL << 3)
-
-#endif /* OPROFILE_CPU_BUFFER_H */
diff --git a/drivers/oprofile/event_buffer.c b/drivers/oprofile/event_buffer.c
deleted file mode 100644
index 6c9edc8bbc95..000000000000
--- a/drivers/oprofile/event_buffer.c
+++ /dev/null
@@ -1,209 +0,0 @@
-/**
- * @file event_buffer.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <levon@movementarian.org>
- *
- * This is the global event buffer that the user-space
- * daemon reads from. The event buffer is an untyped array
- * of unsigned longs. Entries are prefixed by the
- * escape value ESCAPE_CODE followed by an identifying code.
- */
-
-#include <linux/vmalloc.h>
-#include <linux/oprofile.h>
-#include <linux/sched/signal.h>
-#include <linux/capability.h>
-#include <linux/dcookies.h>
-#include <linux/fs.h>
-#include <linux/uaccess.h>
-
-#include "oprof.h"
-#include "event_buffer.h"
-#include "oprofile_stats.h"
-
-DEFINE_MUTEX(buffer_mutex);
-
-static unsigned long buffer_opened;
-static DECLARE_WAIT_QUEUE_HEAD(buffer_wait);
-static unsigned long *event_buffer;
-static unsigned long buffer_size;
-static unsigned long buffer_watershed;
-static size_t buffer_pos;
-/* atomic_t because wait_event checks it outside of buffer_mutex */
-static atomic_t buffer_ready = ATOMIC_INIT(0);
-
-/*
- * Add an entry to the event buffer. When we get near to the end we
- * wake up the process sleeping on the read() of the file. To protect
- * the event_buffer this function may only be called when buffer_mutex
- * is set.
- */
-void add_event_entry(unsigned long value)
-{
-	/*
-	 * This shouldn't happen since all workqueues or handlers are
-	 * canceled or flushed before the event buffer is freed.
-	 */
-	if (!event_buffer) {
-		WARN_ON_ONCE(1);
-		return;
-	}
-
-	if (buffer_pos == buffer_size) {
-		atomic_inc(&oprofile_stats.event_lost_overflow);
-		return;
-	}
-
-	event_buffer[buffer_pos] = value;
-	if (++buffer_pos == buffer_size - buffer_watershed) {
-		atomic_set(&buffer_ready, 1);
-		wake_up(&buffer_wait);
-	}
-}
-
-
-/* Wake up the waiting process if any. This happens
- * on "echo 0 >/dev/oprofile/enable" so the daemon
- * processes the data remaining in the event buffer.
- */
-void wake_up_buffer_waiter(void)
-{
-	mutex_lock(&buffer_mutex);
-	atomic_set(&buffer_ready, 1);
-	wake_up(&buffer_wait);
-	mutex_unlock(&buffer_mutex);
-}
-
-
-int alloc_event_buffer(void)
-{
-	unsigned long flags;
-
-	raw_spin_lock_irqsave(&oprofilefs_lock, flags);
-	buffer_size = oprofile_buffer_size;
-	buffer_watershed = oprofile_buffer_watershed;
-	raw_spin_unlock_irqrestore(&oprofilefs_lock, flags);
-
-	if (buffer_watershed >= buffer_size)
-		return -EINVAL;
-
-	buffer_pos = 0;
-	event_buffer = vmalloc(array_size(buffer_size, sizeof(unsigned long)));
-	if (!event_buffer)
-		return -ENOMEM;
-
-	return 0;
-}
-
-
-void free_event_buffer(void)
-{
-	mutex_lock(&buffer_mutex);
-	vfree(event_buffer);
-	buffer_pos = 0;
-	event_buffer = NULL;
-	mutex_unlock(&buffer_mutex);
-}
-
-
-static int event_buffer_open(struct inode *inode, struct file *file)
-{
-	int err = -EPERM;
-
-	if (!perfmon_capable())
-		return -EPERM;
-
-	if (test_and_set_bit_lock(0, &buffer_opened))
-		return -EBUSY;
-
-	/* Register as a user of dcookies
-	 * to ensure they persist for the lifetime of
-	 * the open event file
-	 */
-	err = -EINVAL;
-	file->private_data = dcookie_register();
-	if (!file->private_data)
-		goto out;
-
-	if ((err = oprofile_setup()))
-		goto fail;
-
-	/* NB: the actual start happens from userspace
-	 * echo 1 >/dev/oprofile/enable
-	 */
-
-	return nonseekable_open(inode, file);
-
-fail:
-	dcookie_unregister(file->private_data);
-out:
-	__clear_bit_unlock(0, &buffer_opened);
-	return err;
-}
-
-
-static int event_buffer_release(struct inode *inode, struct file *file)
-{
-	oprofile_stop();
-	oprofile_shutdown();
-	dcookie_unregister(file->private_data);
-	buffer_pos = 0;
-	atomic_set(&buffer_ready, 0);
-	__clear_bit_unlock(0, &buffer_opened);
-	return 0;
-}
-
-
-static ssize_t event_buffer_read(struct file *file, char __user *buf,
-				 size_t count, loff_t *offset)
-{
-	int retval = -EINVAL;
-	size_t const max = buffer_size * sizeof(unsigned long);
-
-	/* handling partial reads is more trouble than it's worth */
-	if (count != max || *offset)
-		return -EINVAL;
-
-	wait_event_interruptible(buffer_wait, atomic_read(&buffer_ready));
-
-	if (signal_pending(current))
-		return -EINTR;
-
-	/* can't currently happen */
-	if (!atomic_read(&buffer_ready))
-		return -EAGAIN;
-
-	mutex_lock(&buffer_mutex);
-
-	/* May happen if the buffer is freed during pending reads. */
-	if (!event_buffer) {
-		retval = -EINTR;
-		goto out;
-	}
-
-	atomic_set(&buffer_ready, 0);
-
-	retval = -EFAULT;
-
-	count = buffer_pos * sizeof(unsigned long);
-
-	if (copy_to_user(buf, event_buffer, count))
-		goto out;
-
-	retval = count;
-	buffer_pos = 0;
-
-out:
-	mutex_unlock(&buffer_mutex);
-	return retval;
-}
-
-const struct file_operations event_buffer_fops = {
-	.open		= event_buffer_open,
-	.release	= event_buffer_release,
-	.read		= event_buffer_read,
-	.llseek		= no_llseek,
-};
diff --git a/drivers/oprofile/event_buffer.h b/drivers/oprofile/event_buffer.h
deleted file mode 100644
index a8d5bb3cba89..000000000000
--- a/drivers/oprofile/event_buffer.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/**
- * @file event_buffer.h
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <levon@movementarian.org>
- */
-
-#ifndef EVENT_BUFFER_H
-#define EVENT_BUFFER_H
-
-#include <linux/types.h>
-#include <linux/mutex.h>
-
-int alloc_event_buffer(void);
-
-void free_event_buffer(void);
-
-/**
- * Add data to the event buffer.
- * The data passed is free-form, but typically consists of
- * file offsets, dcookies, context information, and ESCAPE codes.
- */
-void add_event_entry(unsigned long data);
-
-/* wake up the process sleeping on the event file */
-void wake_up_buffer_waiter(void);
-
-#define INVALID_COOKIE ~0UL
-#define NO_COOKIE 0UL
-
-extern const struct file_operations event_buffer_fops;
-
-/* mutex between sync_cpu_buffers() and the
- * file reading code.
- */
-extern struct mutex buffer_mutex;
-
-#endif /* EVENT_BUFFER_H */
diff --git a/drivers/oprofile/nmi_timer_int.c b/drivers/oprofile/nmi_timer_int.c
deleted file mode 100644
index f343bd96609a..000000000000
--- a/drivers/oprofile/nmi_timer_int.c
+++ /dev/null
@@ -1,157 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/**
- * @file nmi_timer_int.c
- *
- * @remark Copyright 2011 Advanced Micro Devices, Inc.
- *
- * @author Robert Richter <robert.richter@amd.com>
- */
-
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/errno.h>
-#include <linux/oprofile.h>
-#include <linux/perf_event.h>
-
-#ifdef CONFIG_OPROFILE_NMI_TIMER
-
-static DEFINE_PER_CPU(struct perf_event *, nmi_timer_events);
-static int ctr_running;
-
-static struct perf_event_attr nmi_timer_attr = {
-	.type           = PERF_TYPE_HARDWARE,
-	.config         = PERF_COUNT_HW_CPU_CYCLES,
-	.size           = sizeof(struct perf_event_attr),
-	.pinned         = 1,
-	.disabled       = 1,
-};
-
-static void nmi_timer_callback(struct perf_event *event,
-			       struct perf_sample_data *data,
-			       struct pt_regs *regs)
-{
-	event->hw.interrupts = 0;       /* don't throttle interrupts */
-	oprofile_add_sample(regs, 0);
-}
-
-static int nmi_timer_start_cpu(int cpu)
-{
-	struct perf_event *event = per_cpu(nmi_timer_events, cpu);
-
-	if (!event) {
-		event = perf_event_create_kernel_counter(&nmi_timer_attr, cpu, NULL,
-							 nmi_timer_callback, NULL);
-		if (IS_ERR(event))
-			return PTR_ERR(event);
-		per_cpu(nmi_timer_events, cpu) = event;
-	}
-
-	if (event && ctr_running)
-		perf_event_enable(event);
-
-	return 0;
-}
-
-static void nmi_timer_stop_cpu(int cpu)
-{
-	struct perf_event *event = per_cpu(nmi_timer_events, cpu);
-
-	if (event && ctr_running)
-		perf_event_disable(event);
-}
-
-static int nmi_timer_cpu_online(unsigned int cpu)
-{
-	nmi_timer_start_cpu(cpu);
-	return 0;
-}
-static int nmi_timer_cpu_predown(unsigned int cpu)
-{
-	nmi_timer_stop_cpu(cpu);
-	return 0;
-}
-
-static int nmi_timer_start(void)
-{
-	int cpu;
-
-	get_online_cpus();
-	ctr_running = 1;
-	for_each_online_cpu(cpu)
-		nmi_timer_start_cpu(cpu);
-	put_online_cpus();
-
-	return 0;
-}
-
-static void nmi_timer_stop(void)
-{
-	int cpu;
-
-	get_online_cpus();
-	for_each_online_cpu(cpu)
-		nmi_timer_stop_cpu(cpu);
-	ctr_running = 0;
-	put_online_cpus();
-}
-
-static enum cpuhp_state hp_online;
-
-static void nmi_timer_shutdown(void)
-{
-	struct perf_event *event;
-	int cpu;
-
-	cpuhp_remove_state(hp_online);
-	for_each_possible_cpu(cpu) {
-		event = per_cpu(nmi_timer_events, cpu);
-		if (!event)
-			continue;
-		perf_event_disable(event);
-		per_cpu(nmi_timer_events, cpu) = NULL;
-		perf_event_release_kernel(event);
-	}
-}
-
-static int nmi_timer_setup(void)
-{
-	int err;
-	u64 period;
-
-	/* clock cycles per tick: */
-	period = (u64)cpu_khz * 1000;
-	do_div(period, HZ);
-	nmi_timer_attr.sample_period = period;
-
-	err = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "oprofile/nmi:online",
-				nmi_timer_cpu_online, nmi_timer_cpu_predown);
-	if (err < 0) {
-		nmi_timer_shutdown();
-		return err;
-	}
-	hp_online = err;
-	return 0;
-}
-
-int __init op_nmi_timer_init(struct oprofile_operations *ops)
-{
-	int err = 0;
-
-	err = nmi_timer_setup();
-	if (err)
-		return err;
-	nmi_timer_shutdown();		/* only check, don't alloc */
-
-	ops->create_files	= NULL;
-	ops->setup		= nmi_timer_setup;
-	ops->shutdown		= nmi_timer_shutdown;
-	ops->start		= nmi_timer_start;
-	ops->stop		= nmi_timer_stop;
-	ops->cpu_type		= "timer";
-
-	printk(KERN_INFO "oprofile: using NMI timer interrupt.\n");
-
-	return 0;
-}
-
-#endif
diff --git a/drivers/oprofile/oprof.c b/drivers/oprofile/oprof.c
deleted file mode 100644
index ed2c3ec07024..000000000000
--- a/drivers/oprofile/oprof.c
+++ /dev/null
@@ -1,286 +0,0 @@
-/**
- * @file oprof.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <levon@movementarian.org>
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/oprofile.h>
-#include <linux/moduleparam.h>
-#include <linux/workqueue.h>
-#include <linux/time.h>
-#include <linux/mutex.h>
-
-#include "oprof.h"
-#include "event_buffer.h"
-#include "cpu_buffer.h"
-#include "buffer_sync.h"
-#include "oprofile_stats.h"
-
-struct oprofile_operations oprofile_ops;
-
-unsigned long oprofile_started;
-unsigned long oprofile_backtrace_depth;
-static unsigned long is_setup;
-static DEFINE_MUTEX(start_mutex);
-
-/* timer
-   0 - use performance monitoring hardware if available
-   1 - use the timer int mechanism regardless
- */
-static int timer = 0;
-
-int oprofile_setup(void)
-{
-	int err;
-
-	mutex_lock(&start_mutex);
-
-	if ((err = alloc_cpu_buffers()))
-		goto out;
-
-	if ((err = alloc_event_buffer()))
-		goto out1;
-
-	if (oprofile_ops.setup && (err = oprofile_ops.setup()))
-		goto out2;
-
-	/* Note even though this starts part of the
-	 * profiling overhead, it's necessary to prevent
-	 * us missing task deaths and eventually oopsing
-	 * when trying to process the event buffer.
-	 */
-	if (oprofile_ops.sync_start) {
-		int sync_ret = oprofile_ops.sync_start();
-		switch (sync_ret) {
-		case 0:
-			goto post_sync;
-		case 1:
-			goto do_generic;
-		case -1:
-			goto out3;
-		default:
-			goto out3;
-		}
-	}
-do_generic:
-	if ((err = sync_start()))
-		goto out3;
-
-post_sync:
-	is_setup = 1;
-	mutex_unlock(&start_mutex);
-	return 0;
-
-out3:
-	if (oprofile_ops.shutdown)
-		oprofile_ops.shutdown();
-out2:
-	free_event_buffer();
-out1:
-	free_cpu_buffers();
-out:
-	mutex_unlock(&start_mutex);
-	return err;
-}
-
-#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
-
-static void switch_worker(struct work_struct *work);
-static DECLARE_DELAYED_WORK(switch_work, switch_worker);
-
-static void start_switch_worker(void)
-{
-	if (oprofile_ops.switch_events)
-		schedule_delayed_work(&switch_work, oprofile_time_slice);
-}
-
-static void stop_switch_worker(void)
-{
-	cancel_delayed_work_sync(&switch_work);
-}
-
-static void switch_worker(struct work_struct *work)
-{
-	if (oprofile_ops.switch_events())
-		return;
-
-	atomic_inc(&oprofile_stats.multiplex_counter);
-	start_switch_worker();
-}
-
-/* User inputs in ms, converts to jiffies */
-int oprofile_set_timeout(unsigned long val_msec)
-{
-	int err = 0;
-	unsigned long time_slice;
-
-	mutex_lock(&start_mutex);
-
-	if (oprofile_started) {
-		err = -EBUSY;
-		goto out;
-	}
-
-	if (!oprofile_ops.switch_events) {
-		err = -EINVAL;
-		goto out;
-	}
-
-	time_slice = msecs_to_jiffies(val_msec);
-	if (time_slice == MAX_JIFFY_OFFSET) {
-		err = -EINVAL;
-		goto out;
-	}
-
-	oprofile_time_slice = time_slice;
-
-out:
-	mutex_unlock(&start_mutex);
-	return err;
-
-}
-
-#else
-
-static inline void start_switch_worker(void) { }
-static inline void stop_switch_worker(void) { }
-
-#endif
-
-/* Actually start profiling (echo 1>/dev/oprofile/enable) */
-int oprofile_start(void)
-{
-	int err = -EINVAL;
-
-	mutex_lock(&start_mutex);
-
-	if (!is_setup)
-		goto out;
-
-	err = 0;
-
-	if (oprofile_started)
-		goto out;
-
-	oprofile_reset_stats();
-
-	if ((err = oprofile_ops.start()))
-		goto out;
-
-	start_switch_worker();
-
-	oprofile_started = 1;
-out:
-	mutex_unlock(&start_mutex);
-	return err;
-}
-
-
-/* echo 0>/dev/oprofile/enable */
-void oprofile_stop(void)
-{
-	mutex_lock(&start_mutex);
-	if (!oprofile_started)
-		goto out;
-	oprofile_ops.stop();
-	oprofile_started = 0;
-
-	stop_switch_worker();
-
-	/* wake up the daemon to read what remains */
-	wake_up_buffer_waiter();
-out:
-	mutex_unlock(&start_mutex);
-}
-
-
-void oprofile_shutdown(void)
-{
-	mutex_lock(&start_mutex);
-	if (oprofile_ops.sync_stop) {
-		int sync_ret = oprofile_ops.sync_stop();
-		switch (sync_ret) {
-		case 0:
-			goto post_sync;
-		case 1:
-			goto do_generic;
-		default:
-			goto post_sync;
-		}
-	}
-do_generic:
-	sync_stop();
-post_sync:
-	if (oprofile_ops.shutdown)
-		oprofile_ops.shutdown();
-	is_setup = 0;
-	free_event_buffer();
-	free_cpu_buffers();
-	mutex_unlock(&start_mutex);
-}
-
-int oprofile_set_ulong(unsigned long *addr, unsigned long val)
-{
-	int err = -EBUSY;
-
-	mutex_lock(&start_mutex);
-	if (!oprofile_started) {
-		*addr = val;
-		err = 0;
-	}
-	mutex_unlock(&start_mutex);
-
-	return err;
-}
-
-static int timer_mode;
-
-static int __init oprofile_init(void)
-{
-	int err;
-
-	/* always init architecture to setup backtrace support */
-	timer_mode = 0;
-	err = oprofile_arch_init(&oprofile_ops);
-	if (!err) {
-		if (!timer && !oprofilefs_register())
-			return 0;
-		oprofile_arch_exit();
-	}
-
-	/* setup timer mode: */
-	timer_mode = 1;
-	/* no nmi timer mode if oprofile.timer is set */
-	if (timer || op_nmi_timer_init(&oprofile_ops)) {
-		err = oprofile_timer_init(&oprofile_ops);
-		if (err)
-			return err;
-	}
-
-	return oprofilefs_register();
-}
-
-
-static void __exit oprofile_exit(void)
-{
-	oprofilefs_unregister();
-	if (!timer_mode)
-		oprofile_arch_exit();
-}
-
-
-module_init(oprofile_init);
-module_exit(oprofile_exit);
-
-module_param_named(timer, timer, int, 0644);
-MODULE_PARM_DESC(timer, "force use of timer interrupt");
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("John Levon <levon@movementarian.org>");
-MODULE_DESCRIPTION("OProfile system profiler");
diff --git a/drivers/oprofile/oprof.h b/drivers/oprofile/oprof.h
deleted file mode 100644
index d5412060ab0f..000000000000
--- a/drivers/oprofile/oprof.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/**
- * @file oprof.h
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <levon@movementarian.org>
- */
-
-#ifndef OPROF_H
-#define OPROF_H
-
-int oprofile_setup(void);
-void oprofile_shutdown(void);
-
-int oprofilefs_register(void);
-void oprofilefs_unregister(void);
-
-int oprofile_start(void);
-void oprofile_stop(void);
-
-struct oprofile_operations;
-
-extern unsigned long oprofile_buffer_size;
-extern unsigned long oprofile_cpu_buffer_size;
-extern unsigned long oprofile_buffer_watershed;
-extern unsigned long oprofile_time_slice;
-
-extern struct oprofile_operations oprofile_ops;
-extern unsigned long oprofile_started;
-extern unsigned long oprofile_backtrace_depth;
-
-struct dentry;
-
-void oprofile_create_files(struct dentry *root);
-int oprofile_timer_init(struct oprofile_operations *ops);
-#ifdef CONFIG_OPROFILE_NMI_TIMER
-int op_nmi_timer_init(struct oprofile_operations *ops);
-#else
-static inline int op_nmi_timer_init(struct oprofile_operations *ops)
-{
-	return -ENODEV;
-}
-#endif
-
-
-int oprofile_set_ulong(unsigned long *addr, unsigned long val);
-int oprofile_set_timeout(unsigned long time);
-
-#endif /* OPROF_H */
diff --git a/drivers/oprofile/oprofile_files.c b/drivers/oprofile/oprofile_files.c
deleted file mode 100644
index ee2cfce358b9..000000000000
--- a/drivers/oprofile/oprofile_files.c
+++ /dev/null
@@ -1,201 +0,0 @@
-/**
- * @file oprofile_files.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <levon@movementarian.org>
- */
-
-#include <linux/fs.h>
-#include <linux/oprofile.h>
-#include <linux/jiffies.h>
-
-#include "event_buffer.h"
-#include "oprofile_stats.h"
-#include "oprof.h"
-
-#define BUFFER_SIZE_DEFAULT		131072
-#define CPU_BUFFER_SIZE_DEFAULT		8192
-#define BUFFER_WATERSHED_DEFAULT	32768	/* FIXME: tune */
-#define TIME_SLICE_DEFAULT		1
-
-unsigned long oprofile_buffer_size;
-unsigned long oprofile_cpu_buffer_size;
-unsigned long oprofile_buffer_watershed;
-unsigned long oprofile_time_slice;
-
-#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
-
-static ssize_t timeout_read(struct file *file, char __user *buf,
-		size_t count, loff_t *offset)
-{
-	return oprofilefs_ulong_to_user(jiffies_to_msecs(oprofile_time_slice),
-					buf, count, offset);
-}
-
-
-static ssize_t timeout_write(struct file *file, char const __user *buf,
-		size_t count, loff_t *offset)
-{
-	unsigned long val;
-	int retval;
-
-	if (*offset)
-		return -EINVAL;
-
-	retval = oprofilefs_ulong_from_user(&val, buf, count);
-	if (retval <= 0)
-		return retval;
-
-	retval = oprofile_set_timeout(val);
-
-	if (retval)
-		return retval;
-	return count;
-}
-
-
-static const struct file_operations timeout_fops = {
-	.read		= timeout_read,
-	.write		= timeout_write,
-	.llseek		= default_llseek,
-};
-
-#endif
-
-
-static ssize_t depth_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
-	return oprofilefs_ulong_to_user(oprofile_backtrace_depth, buf, count,
-					offset);
-}
-
-
-static ssize_t depth_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
-{
-	unsigned long val;
-	int retval;
-
-	if (*offset)
-		return -EINVAL;
-
-	if (!oprofile_ops.backtrace)
-		return -EINVAL;
-
-	retval = oprofilefs_ulong_from_user(&val, buf, count);
-	if (retval <= 0)
-		return retval;
-
-	retval = oprofile_set_ulong(&oprofile_backtrace_depth, val);
-	if (retval)
-		return retval;
-
-	return count;
-}
-
-
-static const struct file_operations depth_fops = {
-	.read		= depth_read,
-	.write		= depth_write,
-	.llseek		= default_llseek,
-};
-
-
-static ssize_t pointer_size_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
-	return oprofilefs_ulong_to_user(sizeof(void *), buf, count, offset);
-}
-
-
-static const struct file_operations pointer_size_fops = {
-	.read		= pointer_size_read,
-	.llseek		= default_llseek,
-};
-
-
-static ssize_t cpu_type_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
-	return oprofilefs_str_to_user(oprofile_ops.cpu_type, buf, count, offset);
-}
-
-
-static const struct file_operations cpu_type_fops = {
-	.read		= cpu_type_read,
-	.llseek		= default_llseek,
-};
-
-
-static ssize_t enable_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
-	return oprofilefs_ulong_to_user(oprofile_started, buf, count, offset);
-}
-
-
-static ssize_t enable_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
-{
-	unsigned long val;
-	int retval;
-
-	if (*offset)
-		return -EINVAL;
-
-	retval = oprofilefs_ulong_from_user(&val, buf, count);
-	if (retval <= 0)
-		return retval;
-
-	retval = 0;
-	if (val)
-		retval = oprofile_start();
-	else
-		oprofile_stop();
-
-	if (retval)
-		return retval;
-	return count;
-}
-
-
-static const struct file_operations enable_fops = {
-	.read		= enable_read,
-	.write		= enable_write,
-	.llseek		= default_llseek,
-};
-
-
-static ssize_t dump_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
-{
-	wake_up_buffer_waiter();
-	return count;
-}
-
-
-static const struct file_operations dump_fops = {
-	.write		= dump_write,
-	.llseek		= noop_llseek,
-};
-
-void oprofile_create_files(struct dentry *root)
-{
-	/* reinitialize default values */
-	oprofile_buffer_size =		BUFFER_SIZE_DEFAULT;
-	oprofile_cpu_buffer_size =	CPU_BUFFER_SIZE_DEFAULT;
-	oprofile_buffer_watershed =	BUFFER_WATERSHED_DEFAULT;
-	oprofile_time_slice =		msecs_to_jiffies(TIME_SLICE_DEFAULT);
-
-	oprofilefs_create_file(root, "enable", &enable_fops);
-	oprofilefs_create_file_perm(root, "dump", &dump_fops, 0666);
-	oprofilefs_create_file(root, "buffer", &event_buffer_fops);
-	oprofilefs_create_ulong(root, "buffer_size", &oprofile_buffer_size);
-	oprofilefs_create_ulong(root, "buffer_watershed", &oprofile_buffer_watershed);
-	oprofilefs_create_ulong(root, "cpu_buffer_size", &oprofile_cpu_buffer_size);
-	oprofilefs_create_file(root, "cpu_type", &cpu_type_fops);
-	oprofilefs_create_file(root, "backtrace_depth", &depth_fops);
-	oprofilefs_create_file(root, "pointer_size", &pointer_size_fops);
-#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
-	oprofilefs_create_file(root, "time_slice", &timeout_fops);
-#endif
-	oprofile_create_stats_files(root);
-	if (oprofile_ops.create_files)
-		oprofile_ops.create_files(root);
-}
diff --git a/drivers/oprofile/oprofile_perf.c b/drivers/oprofile/oprofile_perf.c
deleted file mode 100644
index 98a63a5f8763..000000000000
--- a/drivers/oprofile/oprofile_perf.c
+++ /dev/null
@@ -1,328 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright 2010 ARM Ltd.
- * Copyright 2012 Advanced Micro Devices, Inc., Robert Richter
- *
- * Perf-events backend for OProfile.
- */
-#include <linux/perf_event.h>
-#include <linux/platform_device.h>
-#include <linux/oprofile.h>
-#include <linux/slab.h>
-
-/*
- * Per performance monitor configuration as set via oprofilefs.
- */
-struct op_counter_config {
-	unsigned long count;
-	unsigned long enabled;
-	unsigned long event;
-	unsigned long unit_mask;
-	unsigned long kernel;
-	unsigned long user;
-	struct perf_event_attr attr;
-};
-
-static int oprofile_perf_enabled;
-static DEFINE_MUTEX(oprofile_perf_mutex);
-
-static struct op_counter_config *counter_config;
-static DEFINE_PER_CPU(struct perf_event **, perf_events);
-static int num_counters;
-
-/*
- * Overflow callback for oprofile.
- */
-static void op_overflow_handler(struct perf_event *event,
-			struct perf_sample_data *data, struct pt_regs *regs)
-{
-	int id;
-	u32 cpu = smp_processor_id();
-
-	for (id = 0; id < num_counters; ++id)
-		if (per_cpu(perf_events, cpu)[id] == event)
-			break;
-
-	if (id != num_counters)
-		oprofile_add_sample(regs, id);
-	else
-		pr_warn("oprofile: ignoring spurious overflow on cpu %u\n",
-			cpu);
-}
-
-/*
- * Called by oprofile_perf_setup to create perf attributes to mirror the oprofile
- * settings in counter_config. Attributes are created as `pinned' events and
- * so are permanently scheduled on the PMU.
- */
-static void op_perf_setup(void)
-{
-	int i;
-	u32 size = sizeof(struct perf_event_attr);
-	struct perf_event_attr *attr;
-
-	for (i = 0; i < num_counters; ++i) {
-		attr = &counter_config[i].attr;
-		memset(attr, 0, size);
-		attr->type		= PERF_TYPE_RAW;
-		attr->size		= size;
-		attr->config		= counter_config[i].event;
-		attr->sample_period	= counter_config[i].count;
-		attr->pinned		= 1;
-	}
-}
-
-static int op_create_counter(int cpu, int event)
-{
-	struct perf_event *pevent;
-
-	if (!counter_config[event].enabled || per_cpu(perf_events, cpu)[event])
-		return 0;
-
-	pevent = perf_event_create_kernel_counter(&counter_config[event].attr,
-						  cpu, NULL,
-						  op_overflow_handler, NULL);
-
-	if (IS_ERR(pevent))
-		return PTR_ERR(pevent);
-
-	if (pevent->state != PERF_EVENT_STATE_ACTIVE) {
-		perf_event_release_kernel(pevent);
-		pr_warn("oprofile: failed to enable event %d on CPU %d\n",
-			event, cpu);
-		return -EBUSY;
-	}
-
-	per_cpu(perf_events, cpu)[event] = pevent;
-
-	return 0;
-}
-
-static void op_destroy_counter(int cpu, int event)
-{
-	struct perf_event *pevent = per_cpu(perf_events, cpu)[event];
-
-	if (pevent) {
-		perf_event_release_kernel(pevent);
-		per_cpu(perf_events, cpu)[event] = NULL;
-	}
-}
-
-/*
- * Called by oprofile_perf_start to create active perf events based on the
- * perviously configured attributes.
- */
-static int op_perf_start(void)
-{
-	int cpu, event, ret = 0;
-
-	for_each_online_cpu(cpu) {
-		for (event = 0; event < num_counters; ++event) {
-			ret = op_create_counter(cpu, event);
-			if (ret)
-				return ret;
-		}
-	}
-
-	return ret;
-}
-
-/*
- * Called by oprofile_perf_stop at the end of a profiling run.
- */
-static void op_perf_stop(void)
-{
-	int cpu, event;
-
-	for_each_online_cpu(cpu)
-		for (event = 0; event < num_counters; ++event)
-			op_destroy_counter(cpu, event);
-}
-
-static int oprofile_perf_create_files(struct dentry *root)
-{
-	unsigned int i;
-
-	for (i = 0; i < num_counters; i++) {
-		struct dentry *dir;
-		char buf[4];
-
-		snprintf(buf, sizeof buf, "%d", i);
-		dir = oprofilefs_mkdir(root, buf);
-		oprofilefs_create_ulong(dir, "enabled", &counter_config[i].enabled);
-		oprofilefs_create_ulong(dir, "event", &counter_config[i].event);
-		oprofilefs_create_ulong(dir, "count", &counter_config[i].count);
-		oprofilefs_create_ulong(dir, "unit_mask", &counter_config[i].unit_mask);
-		oprofilefs_create_ulong(dir, "kernel", &counter_config[i].kernel);
-		oprofilefs_create_ulong(dir, "user", &counter_config[i].user);
-	}
-
-	return 0;
-}
-
-static int oprofile_perf_setup(void)
-{
-	raw_spin_lock(&oprofilefs_lock);
-	op_perf_setup();
-	raw_spin_unlock(&oprofilefs_lock);
-	return 0;
-}
-
-static int oprofile_perf_start(void)
-{
-	int ret = -EBUSY;
-
-	mutex_lock(&oprofile_perf_mutex);
-	if (!oprofile_perf_enabled) {
-		ret = 0;
-		op_perf_start();
-		oprofile_perf_enabled = 1;
-	}
-	mutex_unlock(&oprofile_perf_mutex);
-	return ret;
-}
-
-static void oprofile_perf_stop(void)
-{
-	mutex_lock(&oprofile_perf_mutex);
-	if (oprofile_perf_enabled)
-		op_perf_stop();
-	oprofile_perf_enabled = 0;
-	mutex_unlock(&oprofile_perf_mutex);
-}
-
-#ifdef CONFIG_PM
-
-static int oprofile_perf_suspend(struct platform_device *dev, pm_message_t state)
-{
-	mutex_lock(&oprofile_perf_mutex);
-	if (oprofile_perf_enabled)
-		op_perf_stop();
-	mutex_unlock(&oprofile_perf_mutex);
-	return 0;
-}
-
-static int oprofile_perf_resume(struct platform_device *dev)
-{
-	mutex_lock(&oprofile_perf_mutex);
-	if (oprofile_perf_enabled && op_perf_start())
-		oprofile_perf_enabled = 0;
-	mutex_unlock(&oprofile_perf_mutex);
-	return 0;
-}
-
-static struct platform_driver oprofile_driver = {
-	.driver		= {
-		.name		= "oprofile-perf",
-	},
-	.resume		= oprofile_perf_resume,
-	.suspend	= oprofile_perf_suspend,
-};
-
-static struct platform_device *oprofile_pdev;
-
-static int __init init_driverfs(void)
-{
-	int ret;
-
-	ret = platform_driver_register(&oprofile_driver);
-	if (ret)
-		return ret;
-
-	oprofile_pdev =	platform_device_register_simple(
-				oprofile_driver.driver.name, 0, NULL, 0);
-	if (IS_ERR(oprofile_pdev)) {
-		ret = PTR_ERR(oprofile_pdev);
-		platform_driver_unregister(&oprofile_driver);
-	}
-
-	return ret;
-}
-
-static void exit_driverfs(void)
-{
-	platform_device_unregister(oprofile_pdev);
-	platform_driver_unregister(&oprofile_driver);
-}
-
-#else
-
-static inline int  init_driverfs(void) { return 0; }
-static inline void exit_driverfs(void) { }
-
-#endif /* CONFIG_PM */
-
-void oprofile_perf_exit(void)
-{
-	int cpu, id;
-	struct perf_event *event;
-
-	for_each_possible_cpu(cpu) {
-		for (id = 0; id < num_counters; ++id) {
-			event = per_cpu(perf_events, cpu)[id];
-			if (event)
-				perf_event_release_kernel(event);
-		}
-
-		kfree(per_cpu(perf_events, cpu));
-	}
-
-	kfree(counter_config);
-	exit_driverfs();
-}
-
-int __init oprofile_perf_init(struct oprofile_operations *ops)
-{
-	int cpu, ret = 0;
-
-	ret = init_driverfs();
-	if (ret)
-		return ret;
-
-	num_counters = perf_num_counters();
-	if (num_counters <= 0) {
-		pr_info("oprofile: no performance counters\n");
-		ret = -ENODEV;
-		goto out;
-	}
-
-	counter_config = kcalloc(num_counters,
-			sizeof(struct op_counter_config), GFP_KERNEL);
-
-	if (!counter_config) {
-		pr_info("oprofile: failed to allocate %d "
-				"counters\n", num_counters);
-		ret = -ENOMEM;
-		num_counters = 0;
-		goto out;
-	}
-
-	for_each_possible_cpu(cpu) {
-		per_cpu(perf_events, cpu) = kcalloc(num_counters,
-				sizeof(struct perf_event *), GFP_KERNEL);
-		if (!per_cpu(perf_events, cpu)) {
-			pr_info("oprofile: failed to allocate %d perf events "
-					"for cpu %d\n", num_counters, cpu);
-			ret = -ENOMEM;
-			goto out;
-		}
-	}
-
-	ops->create_files	= oprofile_perf_create_files;
-	ops->setup		= oprofile_perf_setup;
-	ops->start		= oprofile_perf_start;
-	ops->stop		= oprofile_perf_stop;
-	ops->shutdown		= oprofile_perf_stop;
-	ops->cpu_type		= op_name_from_perf_id();
-
-	if (!ops->cpu_type)
-		ret = -ENODEV;
-	else
-		pr_info("oprofile: using %s\n", ops->cpu_type);
-
-out:
-	if (ret)
-		oprofile_perf_exit();
-
-	return ret;
-}
diff --git a/drivers/oprofile/oprofile_stats.c b/drivers/oprofile/oprofile_stats.c
deleted file mode 100644
index 59659cea4582..000000000000
--- a/drivers/oprofile/oprofile_stats.c
+++ /dev/null
@@ -1,84 +0,0 @@
-/**
- * @file oprofile_stats.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon
- */
-
-#include <linux/oprofile.h>
-#include <linux/smp.h>
-#include <linux/cpumask.h>
-#include <linux/threads.h>
-
-#include "oprofile_stats.h"
-#include "cpu_buffer.h"
-
-struct oprofile_stat_struct oprofile_stats;
-
-void oprofile_reset_stats(void)
-{
-	struct oprofile_cpu_buffer *cpu_buf;
-	int i;
-
-	for_each_possible_cpu(i) {
-		cpu_buf = &per_cpu(op_cpu_buffer, i);
-		cpu_buf->sample_received = 0;
-		cpu_buf->sample_lost_overflow = 0;
-		cpu_buf->backtrace_aborted = 0;
-		cpu_buf->sample_invalid_eip = 0;
-	}
-
-	atomic_set(&oprofile_stats.sample_lost_no_mm, 0);
-	atomic_set(&oprofile_stats.sample_lost_no_mapping, 0);
-	atomic_set(&oprofile_stats.event_lost_overflow, 0);
-	atomic_set(&oprofile_stats.bt_lost_no_mapping, 0);
-	atomic_set(&oprofile_stats.multiplex_counter, 0);
-}
-
-
-void oprofile_create_stats_files(struct dentry *root)
-{
-	struct oprofile_cpu_buffer *cpu_buf;
-	struct dentry *cpudir;
-	struct dentry *dir;
-	char buf[10];
-	int i;
-
-	dir = oprofilefs_mkdir(root, "stats");
-	if (!dir)
-		return;
-
-	for_each_possible_cpu(i) {
-		cpu_buf = &per_cpu(op_cpu_buffer, i);
-		snprintf(buf, 10, "cpu%d", i);
-		cpudir = oprofilefs_mkdir(dir, buf);
-
-		/* Strictly speaking access to these ulongs is racy,
-		 * but we can't simply lock them, and they are
-		 * informational only.
-		 */
-		oprofilefs_create_ro_ulong(cpudir, "sample_received",
-			&cpu_buf->sample_received);
-		oprofilefs_create_ro_ulong(cpudir, "sample_lost_overflow",
-			&cpu_buf->sample_lost_overflow);
-		oprofilefs_create_ro_ulong(cpudir, "backtrace_aborted",
-			&cpu_buf->backtrace_aborted);
-		oprofilefs_create_ro_ulong(cpudir, "sample_invalid_eip",
-			&cpu_buf->sample_invalid_eip);
-	}
-
-	oprofilefs_create_ro_atomic(dir, "sample_lost_no_mm",
-		&oprofile_stats.sample_lost_no_mm);
-	oprofilefs_create_ro_atomic(dir, "sample_lost_no_mapping",
-		&oprofile_stats.sample_lost_no_mapping);
-	oprofilefs_create_ro_atomic(dir, "event_lost_overflow",
-		&oprofile_stats.event_lost_overflow);
-	oprofilefs_create_ro_atomic(dir, "bt_lost_no_mapping",
-		&oprofile_stats.bt_lost_no_mapping);
-#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
-	oprofilefs_create_ro_atomic(dir, "multiplex_counter",
-		&oprofile_stats.multiplex_counter);
-#endif
-}
diff --git a/drivers/oprofile/oprofile_stats.h b/drivers/oprofile/oprofile_stats.h
deleted file mode 100644
index 1fc622bd1834..000000000000
--- a/drivers/oprofile/oprofile_stats.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/**
- * @file oprofile_stats.h
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon
- */
-
-#ifndef OPROFILE_STATS_H
-#define OPROFILE_STATS_H
-
-#include <linux/atomic.h>
-
-struct oprofile_stat_struct {
-	atomic_t sample_lost_no_mm;
-	atomic_t sample_lost_no_mapping;
-	atomic_t bt_lost_no_mapping;
-	atomic_t event_lost_overflow;
-	atomic_t multiplex_counter;
-};
-
-extern struct oprofile_stat_struct oprofile_stats;
-
-/* reset all stats to zero */
-void oprofile_reset_stats(void);
-
-struct dentry;
-
-/* create the stats/ dir */
-void oprofile_create_stats_files(struct dentry *root);
-
-#endif /* OPROFILE_STATS_H */
diff --git a/drivers/oprofile/oprofilefs.c b/drivers/oprofile/oprofilefs.c
deleted file mode 100644
index 0875f2f122b3..000000000000
--- a/drivers/oprofile/oprofilefs.c
+++ /dev/null
@@ -1,300 +0,0 @@
-/**
- * @file oprofilefs.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon
- *
- * A simple filesystem for configuration and
- * access of oprofile.
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/oprofile.h>
-#include <linux/fs.h>
-#include <linux/fs_context.h>
-#include <linux/pagemap.h>
-#include <linux/uaccess.h>
-
-#include "oprof.h"
-
-#define OPROFILEFS_MAGIC 0x6f70726f
-
-DEFINE_RAW_SPINLOCK(oprofilefs_lock);
-
-static struct inode *oprofilefs_get_inode(struct super_block *sb, int mode)
-{
-	struct inode *inode = new_inode(sb);
-
-	if (inode) {
-		inode->i_ino = get_next_ino();
-		inode->i_mode = mode;
-		inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
-	}
-	return inode;
-}
-
-
-static const struct super_operations s_ops = {
-	.statfs		= simple_statfs,
-	.drop_inode 	= generic_delete_inode,
-};
-
-
-ssize_t oprofilefs_str_to_user(char const *str, char __user *buf, size_t count, loff_t *offset)
-{
-	return simple_read_from_buffer(buf, count, offset, str, strlen(str));
-}
-
-
-#define TMPBUFSIZE 50
-
-ssize_t oprofilefs_ulong_to_user(unsigned long val, char __user *buf, size_t count, loff_t *offset)
-{
-	char tmpbuf[TMPBUFSIZE];
-	size_t maxlen = snprintf(tmpbuf, TMPBUFSIZE, "%lu\n", val);
-	if (maxlen > TMPBUFSIZE)
-		maxlen = TMPBUFSIZE;
-	return simple_read_from_buffer(buf, count, offset, tmpbuf, maxlen);
-}
-
-
-/*
- * Note: If oprofilefs_ulong_from_user() returns 0, then *val remains
- * unchanged and might be uninitialized. This follows write syscall
- * implementation when count is zero: "If count is zero ... [and if]
- * no errors are detected, 0 will be returned without causing any
- * other effect." (man 2 write)
- */
-int oprofilefs_ulong_from_user(unsigned long *val, char const __user *buf, size_t count)
-{
-	char tmpbuf[TMPBUFSIZE];
-	unsigned long flags;
-
-	if (!count)
-		return 0;
-
-	if (count > TMPBUFSIZE - 1)
-		return -EINVAL;
-
-	memset(tmpbuf, 0x0, TMPBUFSIZE);
-
-	if (copy_from_user(tmpbuf, buf, count))
-		return -EFAULT;
-
-	raw_spin_lock_irqsave(&oprofilefs_lock, flags);
-	*val = simple_strtoul(tmpbuf, NULL, 0);
-	raw_spin_unlock_irqrestore(&oprofilefs_lock, flags);
-	return count;
-}
-
-
-static ssize_t ulong_read_file(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
-	unsigned long *val = file->private_data;
-	return oprofilefs_ulong_to_user(*val, buf, count, offset);
-}
-
-
-static ssize_t ulong_write_file(struct file *file, char const __user *buf, size_t count, loff_t *offset)
-{
-	unsigned long value;
-	int retval;
-
-	if (*offset)
-		return -EINVAL;
-
-	retval = oprofilefs_ulong_from_user(&value, buf, count);
-	if (retval <= 0)
-		return retval;
-
-	retval = oprofile_set_ulong(file->private_data, value);
-	if (retval)
-		return retval;
-
-	return count;
-}
-
-
-static const struct file_operations ulong_fops = {
-	.read		= ulong_read_file,
-	.write		= ulong_write_file,
-	.open		= simple_open,
-	.llseek		= default_llseek,
-};
-
-
-static const struct file_operations ulong_ro_fops = {
-	.read		= ulong_read_file,
-	.open		= simple_open,
-	.llseek		= default_llseek,
-};
-
-
-static int __oprofilefs_create_file(struct dentry *root, char const *name,
-	const struct file_operations *fops, int perm, void *priv)
-{
-	struct dentry *dentry;
-	struct inode *inode;
-
-	if (!root)
-		return -ENOMEM;
-
-	inode_lock(d_inode(root));
-	dentry = d_alloc_name(root, name);
-	if (!dentry) {
-		inode_unlock(d_inode(root));
-		return -ENOMEM;
-	}
-	inode = oprofilefs_get_inode(root->d_sb, S_IFREG | perm);
-	if (!inode) {
-		dput(dentry);
-		inode_unlock(d_inode(root));
-		return -ENOMEM;
-	}
-	inode->i_fop = fops;
-	inode->i_private = priv;
-	d_add(dentry, inode);
-	inode_unlock(d_inode(root));
-	return 0;
-}
-
-
-int oprofilefs_create_ulong(struct dentry *root,
-	char const *name, unsigned long *val)
-{
-	return __oprofilefs_create_file(root, name,
-					&ulong_fops, 0644, val);
-}
-
-
-int oprofilefs_create_ro_ulong(struct dentry *root,
-	char const *name, unsigned long *val)
-{
-	return __oprofilefs_create_file(root, name,
-					&ulong_ro_fops, 0444, val);
-}
-
-
-static ssize_t atomic_read_file(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
-	atomic_t *val = file->private_data;
-	return oprofilefs_ulong_to_user(atomic_read(val), buf, count, offset);
-}
-
-
-static const struct file_operations atomic_ro_fops = {
-	.read		= atomic_read_file,
-	.open		= simple_open,
-	.llseek		= default_llseek,
-};
-
-
-int oprofilefs_create_ro_atomic(struct dentry *root,
-	char const *name, atomic_t *val)
-{
-	return __oprofilefs_create_file(root, name,
-					&atomic_ro_fops, 0444, val);
-}
-
-
-int oprofilefs_create_file(struct dentry *root,
-	char const *name, const struct file_operations *fops)
-{
-	return __oprofilefs_create_file(root, name, fops, 0644, NULL);
-}
-
-
-int oprofilefs_create_file_perm(struct dentry *root,
-	char const *name, const struct file_operations *fops, int perm)
-{
-	return __oprofilefs_create_file(root, name, fops, perm, NULL);
-}
-
-
-struct dentry *oprofilefs_mkdir(struct dentry *parent, char const *name)
-{
-	struct dentry *dentry;
-	struct inode *inode;
-
-	inode_lock(d_inode(parent));
-	dentry = d_alloc_name(parent, name);
-	if (!dentry) {
-		inode_unlock(d_inode(parent));
-		return NULL;
-	}
-	inode = oprofilefs_get_inode(parent->d_sb, S_IFDIR | 0755);
-	if (!inode) {
-		dput(dentry);
-		inode_unlock(d_inode(parent));
-		return NULL;
-	}
-	inode->i_op = &simple_dir_inode_operations;
-	inode->i_fop = &simple_dir_operations;
-	d_add(dentry, inode);
-	inode_unlock(d_inode(parent));
-	return dentry;
-}
-
-
-static int oprofilefs_fill_super(struct super_block *sb, struct fs_context *fc)
-{
-	struct inode *root_inode;
-
-	sb->s_blocksize = PAGE_SIZE;
-	sb->s_blocksize_bits = PAGE_SHIFT;
-	sb->s_magic = OPROFILEFS_MAGIC;
-	sb->s_op = &s_ops;
-	sb->s_time_gran = 1;
-
-	root_inode = oprofilefs_get_inode(sb, S_IFDIR | 0755);
-	if (!root_inode)
-		return -ENOMEM;
-	root_inode->i_op = &simple_dir_inode_operations;
-	root_inode->i_fop = &simple_dir_operations;
-	sb->s_root = d_make_root(root_inode);
-	if (!sb->s_root)
-		return -ENOMEM;
-
-	oprofile_create_files(sb->s_root);
-
-	// FIXME: verify kill_litter_super removes our dentries
-	return 0;
-}
-
-static int oprofilefs_get_tree(struct fs_context *fc)
-{
-	return get_tree_single(fc, oprofilefs_fill_super);
-}
-
-static const struct fs_context_operations oprofilefs_context_ops = {
-	.get_tree	= oprofilefs_get_tree,
-};
-
-static int oprofilefs_init_fs_context(struct fs_context *fc)
-{
-	fc->ops = &oprofilefs_context_ops;
-	return 0;
-}
-
-static struct file_system_type oprofilefs_type = {
-	.owner		= THIS_MODULE,
-	.name		= "oprofilefs",
-	.init_fs_context = oprofilefs_init_fs_context,
-	.kill_sb	= kill_litter_super,
-};
-MODULE_ALIAS_FS("oprofilefs");
-
-
-int __init oprofilefs_register(void)
-{
-	return register_filesystem(&oprofilefs_type);
-}
-
-
-void __exit oprofilefs_unregister(void)
-{
-	unregister_filesystem(&oprofilefs_type);
-}
diff --git a/drivers/oprofile/timer_int.c b/drivers/oprofile/timer_int.c
deleted file mode 100644
index 2498a6cd7c24..000000000000
--- a/drivers/oprofile/timer_int.c
+++ /dev/null
@@ -1,122 +0,0 @@
-/**
- * @file timer_int.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <levon@movementarian.org>
- */
-
-#include <linux/kernel.h>
-#include <linux/notifier.h>
-#include <linux/smp.h>
-#include <linux/oprofile.h>
-#include <linux/profile.h>
-#include <linux/init.h>
-#include <linux/cpu.h>
-#include <linux/hrtimer.h>
-#include <asm/irq_regs.h>
-#include <asm/ptrace.h>
-
-#include "oprof.h"
-
-static DEFINE_PER_CPU(struct hrtimer, oprofile_hrtimer);
-static int ctr_running;
-
-static enum hrtimer_restart oprofile_hrtimer_notify(struct hrtimer *hrtimer)
-{
-	oprofile_add_sample(get_irq_regs(), 0);
-	hrtimer_forward_now(hrtimer, ns_to_ktime(TICK_NSEC));
-	return HRTIMER_RESTART;
-}
-
-static void __oprofile_hrtimer_start(void *unused)
-{
-	struct hrtimer *hrtimer = this_cpu_ptr(&oprofile_hrtimer);
-
-	if (!ctr_running)
-		return;
-
-	hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
-	hrtimer->function = oprofile_hrtimer_notify;
-
-	hrtimer_start(hrtimer, ns_to_ktime(TICK_NSEC),
-		      HRTIMER_MODE_REL_PINNED);
-}
-
-static int oprofile_hrtimer_start(void)
-{
-	get_online_cpus();
-	ctr_running = 1;
-	on_each_cpu(__oprofile_hrtimer_start, NULL, 1);
-	put_online_cpus();
-	return 0;
-}
-
-static void __oprofile_hrtimer_stop(int cpu)
-{
-	struct hrtimer *hrtimer = &per_cpu(oprofile_hrtimer, cpu);
-
-	if (!ctr_running)
-		return;
-
-	hrtimer_cancel(hrtimer);
-}
-
-static void oprofile_hrtimer_stop(void)
-{
-	int cpu;
-
-	get_online_cpus();
-	for_each_online_cpu(cpu)
-		__oprofile_hrtimer_stop(cpu);
-	ctr_running = 0;
-	put_online_cpus();
-}
-
-static int oprofile_timer_online(unsigned int cpu)
-{
-	local_irq_disable();
-	__oprofile_hrtimer_start(NULL);
-	local_irq_enable();
-	return 0;
-}
-
-static int oprofile_timer_prep_down(unsigned int cpu)
-{
-	__oprofile_hrtimer_stop(cpu);
-	return 0;
-}
-
-static enum cpuhp_state hp_online;
-
-static int oprofile_hrtimer_setup(void)
-{
-	int ret;
-
-	ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
-					"oprofile/timer:online",
-					oprofile_timer_online,
-					oprofile_timer_prep_down);
-	if (ret < 0)
-		return ret;
-	hp_online = ret;
-	return 0;
-}
-
-static void oprofile_hrtimer_shutdown(void)
-{
-	cpuhp_remove_state_nocalls(hp_online);
-}
-
-int oprofile_timer_init(struct oprofile_operations *ops)
-{
-	ops->create_files	= NULL;
-	ops->setup		= oprofile_hrtimer_setup;
-	ops->shutdown		= oprofile_hrtimer_shutdown;
-	ops->start		= oprofile_hrtimer_start;
-	ops->stop		= oprofile_hrtimer_stop;
-	ops->cpu_type		= "timer";
-	printk(KERN_INFO "oprofile: using timer interrupt.\n");
-	return 0;
-}