1 files changed, 39 insertions, 11 deletions

diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 2d8a371d4339..6d817554780a 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -109,6 +109,32 @@ print_context_stack(struct thread_info *tinfo,
         }
         return bp;
 }
+EXPORT_SYMBOL_GPL(print_context_stack);
+
+unsigned long
+print_context_stack_bp(struct thread_info *tinfo,
+                       unsigned long *stack, unsigned long bp,
+                       const struct stacktrace_ops *ops, void *data,
+                       unsigned long *end, int *graph)
+{
+        struct stack_frame *frame = (struct stack_frame *)bp;
+        unsigned long *ret_addr = &frame->return_address;
+
+        while (valid_stack_ptr(tinfo, ret_addr, sizeof(*ret_addr), end)) {
+                unsigned long addr = *ret_addr;
+
+                if (!__kernel_text_address(addr))
+                        break;
+
+                ops->address(data, addr, 1);
+                frame = frame->next_frame;
+                ret_addr = &frame->return_address;
+                print_ftrace_graph_addr(addr, data, ops, tinfo, graph);
+        }
+
+        return (unsigned long)frame;
+}
+EXPORT_SYMBOL_GPL(print_context_stack_bp);
 
 
 static void
@@ -141,10 +167,11 @@ static void print_trace_address(void *data, unsigned long addr, int reliable)
 }
 
 static const struct stacktrace_ops print_trace_ops = {
-        .warning = print_trace_warning,
-        .warning_symbol = print_trace_warning_symbol,
-        .stack = print_trace_stack,
-        .address = print_trace_address,
+        .warning                = print_trace_warning,
+        .warning_symbol         = print_trace_warning_symbol,
+        .stack                  = print_trace_stack,
+        .address                = print_trace_address,
+        .walk_stack             = print_context_stack,
 };
 
 void
@@ -188,7 +215,7 @@ void dump_stack(void)
 }
 EXPORT_SYMBOL(dump_stack);
 
-static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
+static arch_spinlock_t die_lock = __ARCH_SPIN_LOCK_UNLOCKED;
 static int die_owner = -1;
 static unsigned int die_nest_count;
 
@@ -207,11 +234,11 @@ unsigned __kprobes long oops_begin(void)
         /* racy, but better than risking deadlock. */
         raw_local_irq_save(flags);
         cpu = smp_processor_id();
-        if (!__raw_spin_trylock(&die_lock)) {
+        if (!arch_spin_trylock(&die_lock)) {
                 if (cpu == die_owner)
                         /* nested oops. should stop eventually */;
                 else
-                        __raw_spin_lock(&die_lock);
+                        arch_spin_lock(&die_lock);
         }
         die_nest_count++;
         die_owner = cpu;
@@ -231,7 +258,7 @@ void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
         die_nest_count--;
         if (!die_nest_count)
                 /* Nest count reaches zero, release the lock. */
-                __raw_spin_unlock(&die_lock);
+                arch_spin_unlock(&die_lock);
         raw_local_irq_restore(flags);
         oops_exit();
 
@@ -268,11 +295,12 @@ int __kprobes __die(const char *str, struct pt_regs *regs, long err)
 
         show_registers(regs);
 #ifdef CONFIG_X86_32
-        sp = (unsigned long) (&regs->sp);
-        savesegment(ss, ss);
-        if (user_mode(regs)) {
+        if (user_mode_vm(regs)) {
                 sp = regs->sp;
                 ss = regs->ss & 0xffff;
+        } else {
+                sp = kernel_stack_pointer(regs);
+                savesegment(ss, ss);
         }
         printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
         print_symbol("%s", regs->ip);