1 files changed, 20 insertions, 9 deletions

diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c
index 313ac1f7dc5a..0d4005dc06c5 100644
--- a/arch/i386/kernel/traps.c
+++ b/arch/i386/kernel/traps.c
@@ -187,10 +187,21 @@ static void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
                         if (unwind_init_blocked(&info, task) == 0)
                                 unw_ret = show_trace_unwind(&info, log_lvl);
                 }
-                if (unw_ret > 0) {
-                        if (call_trace > 0)
+                if (unw_ret > 0 && !arch_unw_user_mode(&info)) {
+#ifdef CONFIG_STACK_UNWIND
+                        print_symbol("DWARF2 unwinder stuck at %s\n",
+                                     UNW_PC(&info));
+                        if (call_trace == 1) {
+                                printk("Leftover inexact backtrace:\n");
+                                if (UNW_SP(&info))
+                                        stack = (void *)UNW_SP(&info);
+                        } else if (call_trace > 1)
                                 return;
-                        printk("%sLegacy call trace:\n", log_lvl);
+                        else
+                                printk("Full inexact backtrace again:\n");
+#else
+                        printk("Inexact backtrace:\n");
+#endif
                 }
         }
 
@@ -442,11 +453,9 @@ void die(const char * str, struct pt_regs * regs, long err)
         if (in_interrupt())
                 panic("Fatal exception in interrupt");
 
-        if (panic_on_oops) {
-                printk(KERN_EMERG "Fatal exception: panic in 5 seconds\n");
-                ssleep(5);
-                panic("Fatal exception");
-        }
+        if (panic_on_oops)
+                panic("Fatal exception: panic_on_oops");
+
         oops_exit();
         do_exit(SIGSEGV);
 }
@@ -1238,8 +1247,10 @@ static int __init call_trace_setup(char *s)
                 call_trace = -1;
         else if (strcmp(s, "both") == 0)
                 call_trace = 0;
-        else if (strcmp(s, "new") == 0)
+        else if (strcmp(s, "newfallback") == 0)
                 call_trace = 1;
+        else if (strcmp(s, "new") == 2)
+                call_trace = 2;
         return 1;
 }
 __setup("call_trace=", call_trace_setup);