1 files changed, 0 insertions, 187 deletions
diff --git a/arch/metag/kernel/stacktrace.c b/arch/metag/kernel/stacktrace.c
deleted file mode 100644
index 09d67b7f51ca..000000000000
--- a/arch/metag/kernel/stacktrace.c
+++ /dev/null
@@ -1,187 +0,0 @@
-#include <linux/export.h>
-#include <linux/sched.h>
-#include <linux/sched/debug.h>
-#include <linux/sched/task_stack.h>
-#include <linux/stacktrace.h>
-
-#include <asm/stacktrace.h>
-
-#if defined(CONFIG_FRAME_POINTER)
-
-#ifdef CONFIG_KALLSYMS
-#include <linux/kallsyms.h>
-#include <linux/module.h>
-
-static unsigned long tbi_boing_addr;
-static unsigned long tbi_boing_size;
-
-static void tbi_boing_init(void)
-{
-	/* We need to know where TBIBoingVec is and it's size */
-	unsigned long size;
-	unsigned long offset;
-	char modname[MODULE_NAME_LEN];
-	char name[KSYM_NAME_LEN];
-	tbi_boing_addr = kallsyms_lookup_name("___TBIBoingVec");
-	if (!tbi_boing_addr)
-		tbi_boing_addr = 1;
-	else if (!lookup_symbol_attrs(tbi_boing_addr, &size,
-				      &offset, modname, name))
-		tbi_boing_size = size;
-}
-#endif
-
-/*
- * Unwind the current stack frame and store the new register values in the
- * structure passed as argument. Unwinding is equivalent to a function return,
- * hence the new PC value rather than LR should be used for backtrace.
- */
-int notrace unwind_frame(struct stackframe *frame)
-{
-	struct metag_frame *fp = (struct metag_frame *)frame->fp;
-	unsigned long lr;
-	unsigned long fpnew;
-
-	if (frame->fp & 0x7)
-		return -EINVAL;
-
-	fpnew = fp->fp;
-	lr = fp->lr - 4;
-
-#ifdef CONFIG_KALLSYMS
-	/* If we've reached TBIBoingVec then we're at an interrupt
-	 * entry point or a syscall entry point. The frame pointer
-	 * points to a pt_regs which can be used to continue tracing on
-	 * the other side of the boing.
-	 */
-	if (!tbi_boing_addr)
-		tbi_boing_init();
-	if (tbi_boing_size && lr >= tbi_boing_addr &&
-	    lr < tbi_boing_addr + tbi_boing_size) {
-		struct pt_regs *regs = (struct pt_regs *)fpnew;
-		if (user_mode(regs))
-			return -EINVAL;
-		fpnew = regs->ctx.AX[1].U0;
-		lr = regs->ctx.DX[4].U1;
-	}
-#endif
-
-	/* stack grows up, so frame pointers must decrease */
-	if (fpnew < (ALIGN_DOWN((unsigned long)fp, THREAD_SIZE) +
-		     sizeof(struct thread_info)) || fpnew >= (unsigned long)fp)
-		return -EINVAL;
-
-	/* restore the registers from the stack frame */
-	frame->fp = fpnew;
-	frame->pc = lr;
-
-	return 0;
-}
-#else
-int notrace unwind_frame(struct stackframe *frame)
-{
-	struct metag_frame *sp = (struct metag_frame *)frame->sp;
-
-	if (frame->sp & 0x7)
-		return -EINVAL;
-
-	while (!kstack_end(sp)) {
-		unsigned long addr = sp->lr - 4;
-		sp--;
-
-		if (__kernel_text_address(addr)) {
-			frame->sp = (unsigned long)sp;
-			frame->pc = addr;
-			return 0;
-		}
-	}
-	return -EINVAL;
-}
-#endif
-
-void notrace walk_stackframe(struct stackframe *frame,
-		     int (*fn)(struct stackframe *, void *), void *data)
-{
-	while (1) {
-		int ret;
-
-		if (fn(frame, data))
-			break;
-		ret = unwind_frame(frame);
-		if (ret < 0)
-			break;
-	}
-}
-EXPORT_SYMBOL(walk_stackframe);
-
-#ifdef CONFIG_STACKTRACE
-struct stack_trace_data {
-	struct stack_trace *trace;
-	unsigned int no_sched_functions;
-	unsigned int skip;
-};
-
-static int save_trace(struct stackframe *frame, void *d)
-{
-	struct stack_trace_data *data = d;
-	struct stack_trace *trace = data->trace;
-	unsigned long addr = frame->pc;
-
-	if (data->no_sched_functions && in_sched_functions(addr))
-		return 0;
-	if (data->skip) {
-		data->skip--;
-		return 0;
-	}
-
-	trace->entries[trace->nr_entries++] = addr;
-
-	return trace->nr_entries >= trace->max_entries;
-}
-
-void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
-{
-	struct stack_trace_data data;
-	struct stackframe frame;
-
-	data.trace = trace;
-	data.skip = trace->skip;
-
-	if (tsk != current) {
-#ifdef CONFIG_SMP
-		/*
-		 * What guarantees do we have here that 'tsk' is not
-		 * running on another CPU?  For now, ignore it as we
-		 * can't guarantee we won't explode.
-		 */
-		if (trace->nr_entries < trace->max_entries)
-			trace->entries[trace->nr_entries++] = ULONG_MAX;
-		return;
-#else
-		data.no_sched_functions = 1;
-		frame.fp = thread_saved_fp(tsk);
-		frame.sp = thread_saved_sp(tsk);
-		frame.lr = 0;		/* recovered from the stack */
-		frame.pc = thread_saved_pc(tsk);
-#endif
-	} else {
-		register unsigned long current_sp asm ("A0StP");
-
-		data.no_sched_functions = 0;
-		frame.fp = (unsigned long)__builtin_frame_address(0);
-		frame.sp = current_sp;
-		frame.lr = (unsigned long)__builtin_return_address(0);
-		frame.pc = (unsigned long)save_stack_trace_tsk;
-	}
-
-	walk_stackframe(&frame, save_trace, &data);
-	if (trace->nr_entries < trace->max_entries)
-		trace->entries[trace->nr_entries++] = ULONG_MAX;
-}
-
-void save_stack_trace(struct stack_trace *trace)
-{
-	save_stack_trace_tsk(current, trace);
-}
-EXPORT_SYMBOL_GPL(save_stack_trace);
-#endif