From 2083fecd1c12fecb419dfb767ba7f18143490b82 Mon Sep 17 00:00:00 2001
From: Viresh Kumar <viresh.kumar@linaro.org>
Date: Thu, 14 Jan 2021 17:05:27 +0530
Subject: arch: sparc: 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 the old oprofile's architecture specific 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: William Cohen <wcohen@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
---
 arch/sparc/oprofile/init.c | 87 ----------------------------------------------
 1 file changed, 87 deletions(-)
 delete mode 100644 arch/sparc/oprofile/init.c

(limited to 'arch/sparc/oprofile/init.c')

diff --git a/arch/sparc/oprofile/init.c b/arch/sparc/oprofile/init.c
deleted file mode 100644
index 43730c9b1c86..000000000000
--- a/arch/sparc/oprofile/init.c
+++ /dev/null
@@ -1,87 +0,0 @@
-/**
- * @file init.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <levon@movementarian.org>
- */
-
-#include <linux/kernel.h>
-#include <linux/oprofile.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/param.h>	/* for HZ */
- 
-#ifdef CONFIG_SPARC64
-#include <linux/notifier.h>
-#include <linux/rcupdate.h>
-#include <linux/kdebug.h>
-#include <asm/nmi.h>
-
-static int profile_timer_exceptions_notify(struct notifier_block *self,
-					   unsigned long val, void *data)
-{
-	struct die_args *args = data;
-	int ret = NOTIFY_DONE;
-
-	switch (val) {
-	case DIE_NMI:
-		oprofile_add_sample(args->regs, 0);
-		ret = NOTIFY_STOP;
-		break;
-	default:
-		break;
-	}
-	return ret;
-}
-
-static struct notifier_block profile_timer_exceptions_nb = {
-	.notifier_call	= profile_timer_exceptions_notify,
-};
-
-static int timer_start(void)
-{
-	if (register_die_notifier(&profile_timer_exceptions_nb))
-		return 1;
-	nmi_adjust_hz(HZ);
-	return 0;
-}
-
-
-static void timer_stop(void)
-{
-	nmi_adjust_hz(1);
-	unregister_die_notifier(&profile_timer_exceptions_nb);
-	synchronize_rcu();  /* Allow already-started NMIs to complete. */
-}
-
-static int op_nmi_timer_init(struct oprofile_operations *ops)
-{
-	if (atomic_read(&nmi_active) <= 0)
-		return -ENODEV;
-
-	ops->start = timer_start;
-	ops->stop = timer_stop;
-	ops->cpu_type = "timer";
-	printk(KERN_INFO "oprofile: Using perfctr NMI timer interrupt.\n");
-	return 0;
-}
-#endif
-
-int __init oprofile_arch_init(struct oprofile_operations *ops)
-{
-	int ret = -ENODEV;
-
-#ifdef CONFIG_SPARC64
-	ret = op_nmi_timer_init(ops);
-	if (!ret)
-		return ret;
-#endif
-
-	return ret;
-}
-
-void oprofile_arch_exit(void)
-{
-}
-- 
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