[PATCH 14/18] arch: sparc: Remove CONFIG_OPROFILE support

From: Viresh Kumar <viresh.kumar@linaro.org>
To: Linus Torvalds <torvalds@linux-foundation.org>,
	Robert Richter <rric@kernel.org>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Michal Marek <michal.lkml@markovi.net>,
	Jonathan Corbet <corbet@lwn.net>,
	"David S. Miller" <davem@davemloft.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Arnd Bergmann <arnd@kernel.org>,
	oprofile-list@lists.sf.net, William Cohen <wcohen@redhat.com>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	anmar.oueja@linaro.org, Christoph Hellwig <hch@infradead.org>,
	linux-kbuild@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org
Subject: [PATCH 14/18] arch: sparc: Remove CONFIG_OPROFILE support
Date: Thu, 14 Jan 2021 17:05:27 +0530	[thread overview]
Message-ID: <048b9e7918a847a6ad549350e30855a1b5d7c58e.1610622251.git.viresh.kumar@linaro.org> (raw)
In-Reply-To: <cover.1610622251.git.viresh.kumar@linaro.org>

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>
---
 Documentation/kbuild/makefiles.rst   |  1 -
 arch/sparc/Kconfig                   |  1 -
 arch/sparc/Makefile                  |  1 -
 arch/sparc/configs/sparc64_defconfig |  1 -
 arch/sparc/oprofile/Makefile         | 10 ----
 arch/sparc/oprofile/init.c           | 87 ----------------------------
 6 files changed, 101 deletions(-)
 delete mode 100644 arch/sparc/oprofile/Makefile
 delete mode 100644 arch/sparc/oprofile/init.c

diff --git a/Documentation/kbuild/makefiles.rst b/Documentation/kbuild/makefiles.rst
index 9f6a11881951..d7b2e027c1f8 100644
--- a/Documentation/kbuild/makefiles.rst
+++ b/Documentation/kbuild/makefiles.rst
@@ -1317,7 +1317,6 @@ a few targets.
 		libs-y                 += arch/sparc/lib/
 
 		drivers-$(CONFIG_PM) += arch/sparc/power/
-		drivers-$(CONFIG_OPROFILE)	+= arch/sparc/oprofile/
 
 7.5 Architecture-specific boot images
 -------------------------------------
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index c9c34dc52b7d..caf95e61162b 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -20,7 +20,6 @@ config SPARC
 	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
diff --git a/arch/sparc/Makefile b/arch/sparc/Makefile
index 4a0919581697..bee99e65fe23 100644
--- a/arch/sparc/Makefile
+++ b/arch/sparc/Makefile
@@ -65,7 +65,6 @@ libs-y                 += arch/sparc/prom/
 libs-y                 += arch/sparc/lib/
 
 drivers-$(CONFIG_PM) += arch/sparc/power/
-drivers-$(CONFIG_OPROFILE)	+= arch/sparc/oprofile/
 
 boot := arch/sparc/boot
 
diff --git a/arch/sparc/configs/sparc64_defconfig b/arch/sparc/configs/sparc64_defconfig
index bde4d21a8ac8..d91eb6a76dd1 100644
--- a/arch/sparc/configs/sparc64_defconfig
+++ b/arch/sparc/configs/sparc64_defconfig
@@ -8,7 +8,6 @@ CONFIG_PERF_EVENTS=y
 # 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
diff --git a/arch/sparc/oprofile/Makefile b/arch/sparc/oprofile/Makefile
deleted file mode 100644
index fe906e403d3a..000000000000
--- a/arch/sparc/oprofile/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-# 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
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)
-{
-}
-- 
2.25.0.rc1.19.g042ed3e048af

