ARC: stack unwinder to bail if PC is not kernel mode

Currently, it doesn't invoke the callback but continues to unwind

Also while at it - simplify the code a bit

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

diff --git a/arch/arc/kernel/stacktrace.c b/arch/arc/kernel/stacktrace.c
index 92320d6..001de4c 100644 (file)
--- a/arch/arc/kernel/stacktrace.c
+++ b/arch/arc/kernel/stacktrace.c
@@ -122,19 +122,17 @@ arc_unwind_core(struct task_struct *tsk, struct pt_regs *regs,
        while (1) {
                address = UNW_PC(&frame_info);
 
-               if (address && __kernel_text_address(address)) {
-                       if (consumer_fn(address, arg) == -1)
-                               break;
-               }
+               if (!address || !__kernel_text_address(address))
+                       break;
 
-               ret = arc_unwind(&frame_info);
+               if (consumer_fn(address, arg) == -1)
+                       break;
 
-               if (ret == 0) {
-                       frame_info.regs.r63 = frame_info.regs.r31;
-                       continue;
-               } else {
+               ret = arc_unwind(&frame_info);
+               if (ret)
                        break;
-               }
+
+               frame_info.regs.r63 = frame_info.regs.r31;
        }
 
        return address;         /* return the last address it saw */