diff --git a/arch/x86/include/asm/stacktrace.h b/arch/x86/include/asm/stacktrace.h
index 780a83efcfd307..ed2be1b5ada867 100644
--- a/arch/x86/include/asm/stacktrace.h
+++ b/arch/x86/include/asm/stacktrace.h
@@ -94,7 +94,7 @@ get_frame_pointer(struct task_struct *task, struct pt_regs *regs)
 	if (regs)
 		return (unsigned long *)regs->bp;
 
-	if (!task || task == current)
+	if (task == current)
 		return __builtin_frame_address(0);
 
 	return (unsigned long *)((struct inactive_task_frame *)task->thread.sp)->bp;
@@ -113,7 +113,7 @@ get_stack_pointer(struct task_struct *task, struct pt_regs *regs)
 	if (regs)
 		return (unsigned long *)kernel_stack_pointer(regs);
 
-	if (!task || task == current)
+	if (task == current)
 		return __builtin_frame_address(0);
 
 	return (unsigned long *)task->thread.sp;
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index aa208e565b03c9..e0648f75515877 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -175,11 +175,13 @@ void show_stack(struct task_struct *task, unsigned long *sp)
 {
 	unsigned long bp = 0;
 
+	task = task ? : current;
+
 	/*
 	 * Stack frames below this one aren't interesting.  Don't show them
 	 * if we're printing for %current.
 	 */
-	if (!sp && (!task || task == current)) {
+	if (!sp && task == current) {
 		sp = get_stack_pointer(current, NULL);
 		bp = (unsigned long)get_frame_pointer(current, NULL);
 	}
diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c
index 122f37d7bb7ec6..4ff000811e0334 100644
--- a/arch/x86/kernel/dumpstack_32.c
+++ b/arch/x86/kernel/dumpstack_32.c
@@ -205,7 +205,7 @@ void show_regs(struct pt_regs *regs)
 		u8 *ip;
 
 		pr_emerg("Stack:\n");
-		show_stack_log_lvl(NULL, regs, NULL, 0, KERN_EMERG);
+		show_stack_log_lvl(current, regs, NULL, 0, KERN_EMERG);
 
 		pr_emerg("Code:");
 
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index 16c0d5f89b5e11..008a29837cabb1 100644
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -278,7 +278,7 @@ void show_regs(struct pt_regs *regs)
 		u8 *ip;
 
 		printk(KERN_DEFAULT "Stack:\n");
-		show_stack_log_lvl(NULL, regs, NULL, 0, KERN_DEFAULT);
+		show_stack_log_lvl(current, regs, NULL, 0, KERN_DEFAULT);
 
 		printk(KERN_DEFAULT "Code: ");