arch: sh: 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>

1 files changed, 0 insertions, 80 deletions

diff --git a/arch/sh/oprofile/backtrace.c b/arch/sh/oprofile/backtrace.c
deleted file mode 100644
index cc16cf86cd92..000000000000
--- a/arch/sh/oprofile/backtrace.c
+++ /dev/null
@@ -1,80 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * SH specific backtracing code for oprofile
- *
- * Copyright 2007 STMicroelectronics Ltd.
- *
- * Author: Dave Peverley <dpeverley@mpc-data.co.uk>
- *
- * Based on ARM oprofile backtrace code by Richard Purdie and in turn, i386
- * oprofile backtrace code by John Levon, David Smith
- */
-#include <linux/oprofile.h>
-#include <linux/sched.h>
-#include <linux/kallsyms.h>
-#include <linux/mm.h>
-#include <asm/unwinder.h>
-#include <asm/ptrace.h>
-#include <linux/uaccess.h>
-#include <asm/sections.h>
-#include <asm/stacktrace.h>
-
-static void backtrace_address(void *data, unsigned long addr, int reliable)
-{
-	unsigned int *depth = data;
-
-	if ((*depth)--)
-		oprofile_add_trace(addr);
-}
-
-static struct stacktrace_ops backtrace_ops = {
-	.address = backtrace_address,
-};
-
-/* Limit to stop backtracing too far. */
-static int backtrace_limit = 20;
-
-static unsigned long *
-user_backtrace(unsigned long *stackaddr, struct pt_regs *regs)
-{
-	unsigned long buf_stack;
-
-	/* Also check accessibility of address */
-	if (!access_ok(stackaddr, sizeof(unsigned long)))
-		return NULL;
-
-	if (__copy_from_user_inatomic(&buf_stack, stackaddr, sizeof(unsigned long)))
-		return NULL;
-
-	/* Quick paranoia check */
-	if (buf_stack & 3)
-		return NULL;
-
-	oprofile_add_trace(buf_stack);
-
-	stackaddr++;
-
-	return stackaddr;
-}
-
-void sh_backtrace(struct pt_regs * const regs, unsigned int depth)
-{
-	unsigned long *stackaddr;
-
-	/*
-	 * Paranoia - clip max depth as we could get lost in the weeds.
-	 */
-	if (depth > backtrace_limit)
-		depth = backtrace_limit;
-
-	stackaddr = (unsigned long *)kernel_stack_pointer(regs);
-	if (!user_mode(regs)) {
-		if (depth)
-			unwind_stack(NULL, regs, stackaddr,
-				     &backtrace_ops, &depth);
-		return;
-	}
-
-	while (depth-- && (stackaddr != NULL))
-		stackaddr = user_backtrace(stackaddr, regs);
-}