rk: temp revert rk change

[firefly-linux-kernel-4.4.55.git] / arch / arm / Kconfig.debug

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 91344af75f39694f89d1b4e16529184816f42965..81cbe40c159c63c20968d224f960d3d353509946 100644 (file)
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -2,6 +2,20 @@ menu "Kernel hacking"
 
 source "lib/Kconfig.debug"
 
+config STRICT_DEVMEM
+       bool "Filter access to /dev/mem"
+       depends on MMU
+       ---help---
+         If this option is disabled, you allow userspace (root) access to all
+         of memory, including kernel and userspace memory. Accidental
+         access to this is obviously disastrous, but specific access can
+         be used by people debugging the kernel.
+
+         If this option is switched on, the /dev/mem file only allows
+         userspace access to memory mapped peripherals.
+
+          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
@@ -9,7 +23,7 @@ source "lib/Kconfig.debug"
 config FRAME_POINTER
        bool
        depends on !THUMB2_KERNEL
-       default y if !ARM_UNWIND
+       default y if !ARM_UNWIND || 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,
@@ -17,7 +31,7 @@ config FRAME_POINTER
          reported is severely limited.
 
 config ARM_UNWIND
-       bool "Enable stack unwinding support"
+       bool "Enable stack unwinding support (EXPERIMENTAL)"
        depends on AEABI && EXPERIMENTAL
        default y
        help
@@ -27,6 +41,11 @@ config ARM_UNWIND
          the performance is not affected. Currently, this feature
          only works with EABI compilers. If unsure say Y.
 
+config OLD_MCOUNT
+       bool
+       depends on FUNCTION_TRACER && FRAME_POINTER
+       default y
+
 config DEBUG_USER
        bool "Verbose user fault messages"
        help
@@ -44,24 +63,6 @@ config DEBUG_USER
              8 - SIGSEGV faults
             16 - SIGBUS faults
 
-config DEBUG_ERRORS
-       bool "Verbose kernel error messages"
-       depends on DEBUG_KERNEL
-       help
-         This option controls verbose debugging information which can be
-         printed when the kernel detects an internal error. This debugging
-         information is useful to kernel hackers when tracking down problems,
-         but mostly meaningless to other people. It's safe to say Y unless
-         you are concerned with the code size or don't want to see these
-         messages.
-
-config DEBUG_STACK_USAGE
-       bool "Enable stack utilization instrumentation"
-       depends on DEBUG_KERNEL
-       help
-         Enables the display of the minimum amount of free stack which each
-         task has ever had available in the sysrq-T output.
-
 # These options are only for real kernel hackers who want to get their hands dirty.
 config DEBUG_LL
        bool "Kernel low-level debugging functions"