proc: warn on non-existing proc entries

[safe/jmp/linux-2.6] / arch / x86 / Kconfig.debug

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index ba4781b..bc01e3e 100644 (file)
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -72,14 +72,6 @@ config DEBUG_STACK_USAGE
 
          This option will slow down process creation somewhat.
 
-config DEBUG_PAGEALLOC
-       bool "Debug page memory allocations"
-       depends on DEBUG_KERNEL
-       ---help---
-         Unmap pages from the kernel linear mapping after free_pages().
-         This results in a large slowdown, but helps to find certain types
-         of memory corruptions.
-
 config DEBUG_PER_CPU_MAPS
        bool "Debug access to per_cpu maps"
        depends on DEBUG_KERNEL
@@ -167,36 +159,41 @@ config IOMMU_DEBUG
          options. See Documentation/x86_64/boot-options.txt for more
          details.
 
+config IOMMU_STRESS
+       bool "Enable IOMMU stress-test mode"
+       ---help---
+         This option disables various optimizations in IOMMU related
+         code to do real stress testing of the IOMMU code. This option
+         will cause a performance drop and should only be enabled for
+         testing.
+
 config IOMMU_LEAK
        bool "IOMMU leak tracing"
-       depends on DEBUG_KERNEL
-       depends on IOMMU_DEBUG
+       depends on IOMMU_DEBUG && DMA_API_DEBUG
        ---help---
          Add a simple leak tracer to the IOMMU code. This is useful when you
          are debugging a buggy device driver that leaks IOMMU mappings.
 
-config MMIOTRACE
-       bool "Memory mapped IO tracing"
-       depends on DEBUG_KERNEL && PCI
-       select TRACING
-       help
-         Mmiotrace traces Memory Mapped I/O access and is meant for
-         debugging and reverse engineering. It is called from the ioremap
-         implementation and works via page faults. Tracing is disabled by
-         default and can be enabled at run-time.
-
-         See Documentation/tracers/mmiotrace.txt.
-         If you are not helping to develop drivers, say N.
-
-config MMIOTRACE_TEST
-       tristate "Test module for mmiotrace"
-       depends on MMIOTRACE && m
-       help
-         This is a dumb module for testing mmiotrace. It is very dangerous
-         as it will write garbage to IO memory starting at a given address.
-         However, it should be safe to use on e.g. unused portion of VRAM.
-
-         Say N, unless you absolutely know what you are doing.
+config X86_DS_SELFTEST
+    bool "DS selftest"
+    default y
+    depends on DEBUG_KERNEL
+    depends on X86_DS
+       ---help---
+         Perform Debug Store selftests at boot time.
+         If in doubt, say "N".
+
+config HAVE_MMIOTRACE_SUPPORT
+       def_bool y
+
+config X86_DECODER_SELFTEST
+       bool "x86 instruction decoder selftest"
+       depends on DEBUG_KERNEL && KPROBES
+       ---help---
+        Perform x86 instruction decoder selftests at build time.
+        This option is useful for checking the sanity of x86 instruction
+        decoder code.
+        If unsure, say "N".
 
 #
 # IO delay types:
@@ -299,4 +296,18 @@ config OPTIMIZE_INLINING
 
          If unsure, say N.
 
+config DEBUG_STRICT_USER_COPY_CHECKS
+       bool "Strict copy size checks"
+       depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING
+       ---help---
+         Enabling this option turns a certain set of sanity checks for user
+         copy operations into compile time failures.
+
+         The copy_from_user() etc checks are there to help test if there
+         are sufficient security checks on the length argument of
+         the copy operation, by having gcc prove that the argument is
+         within bounds.
+
+         If unsure, or if you run an older (pre 4.4) gcc, say N.
+
 endmenu