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 <[e-mail]>
Suggested-by: Linus Torvalds <[e-mail]>
Signed-off-by: Viresh Kumar <[e-mail]>
Acked-by: Robert Richter <[e-mail]>
Acked-by: William Cohen <[e-mail]>
Acked-by: Al Viro <[e-mail]>
Acked-by: Thomas Gleixner <[e-mail]>

Documentation/kbuild/makefiles.rst

···
 		libs-y                 += arch/sparc/lib/
 
 		drivers-$(CONFIG_PM) += arch/sparc/power/
-		drivers-$(CONFIG_OPROFILE)	+= arch/sparc/oprofile/
 
 7.5 Architecture-specific boot images
 -------------------------------------

arch/sparc/Kconfig

···
 	select OF_PROMTREE
 	select HAVE_ASM_MODVERSIONS
 	select HAVE_IDE
-	select HAVE_OPROFILE
 	select HAVE_ARCH_KGDB if !SMP || SPARC64
 	select HAVE_ARCH_TRACEHOOK
 	select HAVE_ARCH_SECCOMP if SPARC64

arch/sparc/Makefile

···
 libs-y                 += arch/sparc/lib/
 
 drivers-$(CONFIG_PM) += arch/sparc/power/
-drivers-$(CONFIG_OPROFILE)	+= arch/sparc/oprofile/
 
 boot := arch/sparc/boot
 

arch/sparc/configs/sparc64_defconfig

···
 # CONFIG_COMPAT_BRK is not set
 CONFIG_SLAB=y
 CONFIG_PROFILING=y
-CONFIG_OPROFILE=m
 CONFIG_KPROBES=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y

arch/sparc/oprofile/Makefile

···
-# SPDX-License-Identifier: GPL-2.0-only
-obj-$(CONFIG_OPROFILE) += oprofile.o
-
-DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
-		oprof.o cpu_buffer.o buffer_sync.o \
-		event_buffer.o oprofile_files.o \
-		oprofilefs.o oprofile_stats.o \
-		timer_int.o )
-
-oprofile-y				:= $(DRIVER_OBJS) init.o

arch/sparc/oprofile/init.c

···
-/**
- * @file init.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <[e-mail]>
- */
-
-#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)
-{
-}