simplify the stacktrace code
[linux-2.6.git] / arch / mips / kernel / stacktrace.c
index a586aba..ebd9db8 100644 (file)
@@ -31,8 +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)
+static void save_context_stack(struct stack_trace *trace, 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(current);
                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(current, &sp, pc, &ra);
        } while (pc);
 #else
        save_raw_context_stack(trace, sp);
@@ -64,22 +63,13 @@ 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)
 {
        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;
-               regs->regs[31] = 0;
-               regs->cp0_epc = task->thread.reg31;
-       } else {
-               if (!task)
-                       task = current;
-               prepare_frametrace(regs);
-       }
-
-       save_context_stack(trace, task, regs);
+       prepare_frametrace(regs);
+       save_context_stack(trace, regs);
 }