Merge branch 'fix/hda-samsung-p50' into topic/hda

[pandora-kernel.git] / arch / mips / kernel / stacktrace.c

diff --git a/arch/mips/kernel/stacktrace.c b/arch/mips/kernel/stacktrace.c
index 0632e2a..58f5cd7 100644 (file)
--- a/arch/mips/kernel/stacktrace.c
+++ b/arch/mips/kernel/stacktrace.c
@@ -32,7 +32,8 @@ static void save_raw_context_stack(struct stack_trace *trace,
        }
 }
 
-static void save_context_stack(struct stack_trace *trace, struct pt_regs *regs)
+static void save_context_stack(struct stack_trace *trace,
+       struct task_struct *tsk, struct pt_regs *regs)
 {
        unsigned long sp = regs->regs[29];
 #ifdef CONFIG_KALLSYMS
@@ -41,7 +42,7 @@ static void save_context_stack(struct stack_trace *trace, struct pt_regs *regs)
 
        if (raw_show_trace || !__kernel_text_address(pc)) {
                unsigned long stack_page =
-                       (unsigned long)task_stack_page(current);
+                       (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 +55,7 @@ static void save_context_stack(struct stack_trace *trace, struct pt_regs *regs)
                        trace->entries[trace->nr_entries++] = pc;
                if (trace->nr_entries >= trace->max_entries)
                        break;
-               pc = unwind_stack(current, &sp, pc, &ra);
+               pc = unwind_stack(tsk, &sp, pc, &ra);
        } while (pc);
 #else
        save_raw_context_stack(trace, sp);
@@ -65,13 +66,24 @@ static void save_context_stack(struct stack_trace *trace, struct pt_regs *regs)
  * Save stack-backtrace addresses into a stack_trace buffer.
  */
 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);
 
-       prepare_frametrace(regs);
-       save_context_stack(trace, regs);
+       if (tsk != current) {
+               regs->regs[29] = tsk->thread.reg29;
+               regs->regs[31] = 0;
+               regs->cp0_epc = tsk->thread.reg31;
+       } else
+               prepare_frametrace(regs);
+       save_context_stack(trace, tsk, regs);
 }
-EXPORT_SYMBOL_GPL(save_stack_trace);
+EXPORT_SYMBOL_GPL(save_stack_trace_tsk);