Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorri...

[linux-2.6-block.git] / arch / arm / Kconfig.debug

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index f6fcb8a7988902cdbc34b5fcbbec1e36e2116abf..a810fa8ba4041f3d6333aef30c28c2c32c00ec5d 100644 (file)
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -45,35 +45,42 @@ config DEBUG_WX
 
                If in doubt, say "Y".
 
-# RMK wants arm kernels compiled with frame pointers or stack unwinding.
-# If you know what you are doing and are willing to live without stack
-# traces, you can get a slightly smaller kernel by setting this option to
-# n, but then RMK will have to kill you ;).
-config FRAME_POINTER
-       bool
-       depends on !THUMB2_KERNEL
-       default y if !ARM_UNWIND || FUNCTION_GRAPH_TRACER
+choice
+       prompt "Choose kernel unwinder"
+       default UNWINDER_ARM if AEABI && !FUNCTION_GRAPH_TRACER
+       default UNWINDER_FRAME_POINTER if !AEABI || FUNCTION_GRAPH_TRACER
        help
-         If you say N here, the resulting kernel will be slightly smaller and
-         faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
-         when a problem occurs with the kernel, the information that is
-         reported is severely limited.
+         This determines which method will be used for unwinding kernel stack
+         traces for panics, oopses, bugs, warnings, perf, /proc/<pid>/stack,
+         livepatch, lockdep, and more.
+
+config UNWINDER_FRAME_POINTER
+       bool "Frame pointer unwinder"
+       depends on !THUMB2_KERNEL && !CC_IS_CLANG
+       select ARCH_WANT_FRAME_POINTERS
+       select FRAME_POINTER
+       help
+         This option enables the frame pointer unwinder for unwinding
+         kernel stack traces.
 
-config ARM_UNWIND
-       bool "Enable stack unwinding support (EXPERIMENTAL)"
+config UNWINDER_ARM
+       bool "ARM EABI stack unwinder"
        depends on AEABI
-       default y
+       select ARM_UNWIND
        help
          This option enables stack unwinding support in the kernel
          using the information automatically generated by the
          compiler. The resulting kernel image is slightly bigger but
          the performance is not affected. Currently, this feature
-         only works with EABI compilers. If unsure say Y.
+         only works with EABI compilers.
 
-config OLD_MCOUNT
+endchoice
+
+config ARM_UNWIND
+       bool
+
+config FRAME_POINTER
        bool
-       depends on FUNCTION_TRACER && FRAME_POINTER
-       default y
 
 config DEBUG_USER
        bool "Verbose user fault messages"