[ARM] Replace __backtrace() with dump_stack().

arch/arm/kernel/fiq.c

@@ -37,6 +37,7 @@
  */
 #include <linux/config.h>
 #include <linux/module.h>
+#include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/mman.h>
 #include <linux/init.h>
@@ -203,9 +204,7 @@ void release_fiq(struct fiq_handler *f)
 	if (current_fiq != f) {
 		printk(KERN_ERR "%s FIQ trying to release %s FIQ\n",
 		       f->name, current_fiq->name);
-#ifdef CONFIG_DEBUG_ERRORS
-		__backtrace();
-#endif
+		dump_stack();
 		return;
 	}
 

arch/arm/kernel/irq.c

@@ -578,9 +578,7 @@ void free_irq(unsigned int irq, void *dev_id)
 
 	if (irq >= NR_IRQS || !irq_desc[irq].valid) {
 		printk(KERN_ERR "Trying to free IRQ%d\n",irq);
-#ifdef CONFIG_DEBUG_ERRORS
-		__backtrace();
-#endif
+		dump_stack();
 		return;
 	}
 
@@ -597,9 +595,7 @@ void free_irq(unsigned int irq, void *dev_id)
 
 	if (!action) {
 		printk(KERN_ERR "Trying to free free IRQ%d\n",irq);
-#ifdef CONFIG_DEBUG_ERRORS
-		__backtrace();
-#endif
+		dump_stack();
 	} else {
 		synchronize_irq(irq);
 		kfree(action);

arch/arm/kernel/traps.c

@@ -170,7 +170,9 @@ static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
 
 void dump_stack(void)
 {
+#ifdef CONFIG_DEBUG_ERRORS
 	__backtrace();
+#endif
 }
 
 /*
@@ -530,7 +532,7 @@ void __pgd_error(const char *file, int line, unsigned long val)
 asmlinkage void __div0(void)
 {
 	printk("Division by zero in kernel.\n");
-	__backtrace();
+	dump_stack();
 }
 
 void abort(void)

arch/arm/mach-footbridge/mm.c

@@ -84,12 +84,8 @@ void __init footbridge_map_io(void)
  */
 unsigned long __virt_to_bus(unsigned long res)
 {
-#ifdef CONFIG_DEBUG_ERRORS
-	if (res < PAGE_OFFSET || res >= (unsigned long)high_memory) {
-		printk("__virt_to_bus: invalid virtual address 0x%08lx\n", res);
-		__backtrace();
-	}
-#endif
+	WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory);
+
 	return (res - PAGE_OFFSET) + (*CSR_PCISDRAMBASE & 0xfffffff0);
 }
 
@@ -98,12 +94,8 @@ unsigned long __bus_to_virt(unsigned long res)
 	res -= (*CSR_PCISDRAMBASE & 0xfffffff0);
 	res += PAGE_OFFSET;
 
-#ifdef CONFIG_DEBUG_ERRORS
-	if (res < PAGE_OFFSET || res >= (unsigned long)high_memory) {
-		printk("__bus_to_virt: invalid virtual address 0x%08lx\n", res);
-		__backtrace();
-	}
-#endif
+	WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory);
+
 	return res;
 }