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>

1 files changed, 0 insertions, 286 deletions

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");