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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>
This commit is contained in:
Viresh Kumar 2021-01-14 17:05:27 +05:30
parent 482cae0a9f
commit 2083fecd1c
6 changed files with 0 additions and 101 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Documentation/kbuild/makefiles.rst
View File

@ -1317,7 +1317,6 @@ When kbuild executes, the following steps are followed (roughly):
libs-y += arch/sparc/lib/
drivers-$(CONFIG_PM) += arch/sparc/power/
drivers-$(CONFIG_OPROFILE) += arch/sparc/oprofile/
7.5 Architecture-specific boot images
-------------------------------------

1
arch/sparc/Kconfig
View File

@ -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

1
arch/sparc/Makefile
View File

@ -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

1
arch/sparc/configs/sparc64_defconfig
View File

@ -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

10
arch/sparc/oprofile/Makefile
View File

@ -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

87
arch/sparc/oprofile/init.c
View File

@ -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)
{
}