1 files changed, 0 insertions, 177 deletions
diff --git a/arch/blackfin/kernel/dumpstack.c b/arch/blackfin/kernel/dumpstack.c
deleted file mode 100644
index 3c992c1f8ef2..000000000000
--- a/arch/blackfin/kernel/dumpstack.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/* Provide basic stack dumping functions
- *
- * Copyright 2004-2009 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later
- */
-
-#include <linux/kernel.h>
-#include <linux/thread_info.h>
-#include <linux/mm.h>
-#include <linux/uaccess.h>
-#include <linux/module.h>
-#include <linux/sched/debug.h>
-
-#include <asm/trace.h>
-
-/*
- * Checks to see if the address pointed to is either a
- * 16-bit CALL instruction, or a 32-bit CALL instruction
- */
-static bool is_bfin_call(unsigned short *addr)
-{
-	unsigned int opcode;
-
-	if (!get_instruction(&opcode, addr))
-		return false;
-
-	if ((opcode >= 0x0060 && opcode <= 0x0067) ||
-	    (opcode >= 0x0070 && opcode <= 0x0077) ||
-	    (opcode >= 0xE3000000 && opcode <= 0xE3FFFFFF))
-		return true;
-
-	return false;
-
-}
-
-void show_stack(struct task_struct *task, unsigned long *stack)
-{
-#ifdef CONFIG_PRINTK
-	unsigned int *addr, *endstack, *fp = 0, *frame;
-	unsigned short *ins_addr;
-	char buf[150];
-	unsigned int i, j, ret_addr, frame_no = 0;
-
-	/*
-	 * If we have been passed a specific stack, use that one otherwise
-	 *    if we have been passed a task structure, use that, otherwise
-	 *    use the stack of where the variable "stack" exists
-	 */
-
-	if (stack == NULL) {
-		if (task) {
-			/* We know this is a kernel stack, so this is the start/end */
-			stack = (unsigned long *)task->thread.ksp;
-			endstack = (unsigned int *)(((unsigned int)(stack) & ~(THREAD_SIZE - 1)) + THREAD_SIZE);
-		} else {
-			/* print out the existing stack info */
-			stack = (unsigned long *)&stack;
-			endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
-		}
-	} else
-		endstack = (unsigned int *)PAGE_ALIGN((unsigned int)stack);
-
-	printk(KERN_NOTICE "Stack info:\n");
-	decode_address(buf, (unsigned int)stack);
-	printk(KERN_NOTICE " SP: [0x%p] %s\n", stack, buf);
-
-	if (!access_ok(VERIFY_READ, stack, (unsigned int)endstack - (unsigned int)stack)) {
-		printk(KERN_NOTICE "Invalid stack pointer\n");
-		return;
-	}
-
-	/* First thing is to look for a frame pointer */
-	for (addr = (unsigned int *)((unsigned int)stack & ~0xF); addr < endstack; addr++) {
-		if (*addr & 0x1)
-			continue;
-		ins_addr = (unsigned short *)*addr;
-		ins_addr--;
-		if (is_bfin_call(ins_addr))
-			fp = addr - 1;
-
-		if (fp) {
-			/* Let's check to see if it is a frame pointer */
-			while (fp >= (addr - 1) && fp < endstack
-			       && fp && ((unsigned int) fp & 0x3) == 0)
-				fp = (unsigned int *)*fp;
-			if (fp == 0 || fp == endstack) {
-				fp = addr - 1;
-				break;
-			}
-			fp = 0;
-		}
-	}
-	if (fp) {
-		frame = fp;
-		printk(KERN_NOTICE " FP: (0x%p)\n", fp);
-	} else
-		frame = 0;
-
-	/*
-	 * Now that we think we know where things are, we
-	 * walk the stack again, this time printing things out
-	 * incase there is no frame pointer, we still look for
-	 * valid return addresses
-	 */
-
-	/* First time print out data, next time, print out symbols */
-	for (j = 0; j <= 1; j++) {
-		if (j)
-			printk(KERN_NOTICE "Return addresses in stack:\n");
-		else
-			printk(KERN_NOTICE " Memory from 0x%08lx to %p", ((long unsigned int)stack & ~0xF), endstack);
-
-		fp = frame;
-		frame_no = 0;
-
-		for (addr = (unsigned int *)((unsigned int)stack & ~0xF), i = 0;
-		     addr < endstack; addr++, i++) {
-
-			ret_addr = 0;
-			if (!j && i % 8 == 0)
-				printk(KERN_NOTICE "%p:", addr);
-
-			/* if it is an odd address, or zero, just skip it */
-			if (*addr & 0x1 || !*addr)
-				goto print;
-
-			ins_addr = (unsigned short *)*addr;
-
-			/* Go back one instruction, and see if it is a CALL */
-			ins_addr--;
-			ret_addr = is_bfin_call(ins_addr);
- print:
-			if (!j && stack == (unsigned long *)addr)
-				printk("[%08x]", *addr);
-			else if (ret_addr)
-				if (j) {
-					decode_address(buf, (unsigned int)*addr);
-					if (frame == addr) {
-						printk(KERN_NOTICE "   frame %2i : %s\n", frame_no, buf);
-						continue;
-					}
-					printk(KERN_NOTICE "    address : %s\n", buf);
-				} else
-					printk("<%08x>", *addr);
-			else if (fp == addr) {
-				if (j)
-					frame = addr+1;
-				else
-					printk("(%08x)", *addr);
-
-				fp = (unsigned int *)*addr;
-				frame_no++;
-
-			} else if (!j)
-				printk(" %08x ", *addr);
-		}
-		if (!j)
-			printk("\n");
-	}
-#endif
-}
-EXPORT_SYMBOL(show_stack);
-
-void dump_stack(void)
-{
-	unsigned long stack;
-#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
-	int tflags;
-#endif
-	trace_buffer_save(tflags);
-	dump_bfin_trace_buffer();
-	dump_stack_print_info(KERN_DEFAULT);
-	show_stack(current, &stack);
-	trace_buffer_restore(tflags);
-}
-EXPORT_SYMBOL(dump_stack);