1 files changed, 17 insertions, 15 deletions

diff --git a/arch/mips/kernel/stacktrace.c b/arch/mips/kernel/stacktrace.c
index a586aba337a..1ba775d24d3 100644
--- a/arch/mips/kernel/stacktrace.c
+++ b/arch/mips/kernel/stacktrace.c
@@ -1,12 +1,11 @@
 /*
- * arch/mips/kernel/stacktrace.c
- *
  * Stack trace management functions
  *
  *  Copyright (C) 2006 Atsushi Nemoto <anemo@mba.ocn.ne.jp>
  */
 #include <linux/sched.h>
 #include <linux/stacktrace.h>
+#include <linux/export.h>
 #include <asm/stacktrace.h>
 
 /*
@@ -32,7 +31,7 @@ static void save_raw_context_stack(struct stack_trace *trace,
 }
 
 static void save_context_stack(struct stack_trace *trace,
-	struct task_struct *task, struct pt_regs *regs)
+	struct task_struct *tsk, struct pt_regs *regs)
 {
 	unsigned long sp = regs->regs[29];
 #ifdef CONFIG_KALLSYMS
@@ -41,7 +40,7 @@ static void save_context_stack(struct stack_trace *trace,
 
 	if (raw_show_trace || !__kernel_text_address(pc)) {
 		unsigned long stack_page =
-			(unsigned long)task_stack_page(task);
+			(unsigned long)task_stack_page(tsk);
 		if (stack_page && sp >= stack_page &&
 		    sp <= stack_page + THREAD_SIZE - 32)
 			save_raw_context_stack(trace, sp);
@@ -54,7 +53,7 @@ static void save_context_stack(struct stack_trace *trace,
 			trace->entries[trace->nr_entries++] = pc;
 		if (trace->nr_entries >= trace->max_entries)
 			break;
-		pc = unwind_stack(task, &sp, pc, &ra);
+		pc = unwind_stack(tsk, &sp, pc, &ra);
 	} while (pc);
 #else
 	save_raw_context_stack(trace, sp);
@@ -64,22 +63,25 @@ static void save_context_stack(struct stack_trace *trace,
 /*
  * Save stack-backtrace addresses into a stack_trace buffer.
  */
-void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
+void save_stack_trace(struct stack_trace *trace)
+{
+	save_stack_trace_tsk(current, trace);
+}
+EXPORT_SYMBOL_GPL(save_stack_trace);
+
+void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
 {
 	struct pt_regs dummyregs;
 	struct pt_regs *regs = &dummyregs;
 
 	WARN_ON(trace->nr_entries || !trace->max_entries);
 
-	if (task && task != current) {
-		regs->regs[29] = task->thread.reg29;
+	if (tsk != current) {
+		regs->regs[29] = tsk->thread.reg29;
 		regs->regs[31] = 0;
-		regs->cp0_epc = task->thread.reg31;
-	} else {
-		if (!task)
-			task = current;
+		regs->cp0_epc = tsk->thread.reg31;
+	} else
 		prepare_frametrace(regs);
-	}
-
-	save_context_stack(trace, task, regs);
+	save_context_stack(trace, tsk, regs);
 }
+EXPORT_SYMBOL_GPL(save_stack_trace_tsk);