2 files changed, 1 insertions, 49 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 818e4589f718..5c2681875b9a 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -354,24 +354,6 @@ config FRAME_POINTER
           some architectures or if you use external debuggers.
           If you don't debug the kernel, you can say N.
 
-config UNWIND_INFO
-        bool "Compile the kernel with frame unwind information"
-        depends on !IA64 && !PARISC && !ARM
-        depends on !MODULES || !(MIPS || PPC || SUPERH || V850)
-        help
-          If you say Y here the resulting kernel image will be slightly larger
-          but not slower, and it will give very useful debugging information.
-          If you don't debug the kernel, you can say N, but we may not be able
-          to solve problems without frame unwind information or frame pointers.
-
-config STACK_UNWIND
-        bool "Stack unwind support"
-        depends on UNWIND_INFO
-        depends on X86
-        help
-          This enables more precise stack traces, omitting all unrelated
-          occurrences of pointers into kernel code from the dump.
-
 config FORCED_INLINING
         bool "Force gcc to inline functions marked 'inline'"
         depends on DEBUG_KERNEL
diff --git a/lib/fault-inject.c b/lib/fault-inject.c
index d143c0faf248..b5a90fc056d3 100644
--- a/lib/fault-inject.c
+++ b/lib/fault-inject.c
@@ -55,37 +55,7 @@ static bool fail_task(struct fault_attr *attr, struct task_struct *task)
 
 #define MAX_STACK_TRACE_DEPTH 32
 
-#ifdef CONFIG_STACK_UNWIND
-
-static asmlinkage int fail_stacktrace_callback(struct unwind_frame_info *info,
-                                                void *arg)
-{
-        int depth;
-        struct fault_attr *attr = arg;
-        bool found = (attr->require_start == 0 && attr->require_end == ULONG_MAX);
-
-        for (depth = 0; depth < attr->stacktrace_depth
-                        && unwind(info) == 0 && UNW_PC(info); depth++) {
-                if (arch_unw_user_mode(info))
-                        break;
-                if (attr->reject_start <= UNW_PC(info) &&
-                               UNW_PC(info) < attr->reject_end)
-                        return false;
-                if (attr->require_start <= UNW_PC(info) &&
-                               UNW_PC(info) < attr->require_end)
-                        found = true;
-        }
-        return found;
-}
-
-static bool fail_stacktrace(struct fault_attr *attr)
-{
-        struct unwind_frame_info info;
-
-        return unwind_init_running(&info, fail_stacktrace_callback, attr);
-}
-
-#elif defined(CONFIG_STACKTRACE)
+#if defined(CONFIG_STACKTRACE)
 
 static bool fail_stacktrace(struct fault_attr *attr)
 {