[PATCH] lockdep: locking API self tests

[mirror_ubuntu-zesty-kernel.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 5330911ebd303ed875657c3e739e5bb966dd5c71..16021b09c1848bde59c572568f108ca8a91f6484 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -23,6 +23,22 @@ config MAGIC_SYSRQ
          keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
          unless you really know what this hack does.
 
+config UNUSED_SYMBOLS
+       bool "Enable unused/obsolete exported symbols"
+       default y if X86
+       help
+         Unused but exported symbols make the kernel needlessly bigger.  For
+         that reason most of these unused exports will soon be removed.  This
+         option is provided temporarily to provide a transition period in case
+         some external kernel module needs one of these symbols anyway. If you
+         encounter such a case in your module, consider if you are actually
+         using the right API.  (rationale: since nobody in the kernel is using
+         this in a module, there is a pretty good chance it's actually the
+         wrong interface to use).  If you really need the symbol, please send a
+         mail to the linux kernel mailing list mentioning the symbol and why
+         you really need it, and what the merge plan to the mainline kernel for
+         your module is.
+
 config DEBUG_KERNEL
        bool "Kernel debugging"
        help
@@ -91,7 +107,7 @@ config DEBUG_SLAB_LEAK
 
 config DEBUG_PREEMPT
        bool "Debug preemptible kernel"
-       depends on DEBUG_KERNEL && PREEMPT
+       depends on DEBUG_KERNEL && PREEMPT && TRACE_IRQFLAGS_SUPPORT
        default y
        help
          If you say Y here then the kernel will use a debug variant of the
@@ -99,14 +115,6 @@ config DEBUG_PREEMPT
          if kernel code uses it in a preemption-unsafe way. Also, the kernel
          will detect preemption count underflows.
 
-config DEBUG_MUTEXES
-       bool "Mutex debugging, deadlock detection"
-       default n
-       depends on DEBUG_KERNEL
-       help
-        This allows mutex semantics violations and mutex related deadlocks
-        (lockups) to be detected and reported automatically.
-
 config DEBUG_RT_MUTEXES
        bool "RT Mutex debugging, deadlock detection"
        depends on DEBUG_KERNEL && RT_MUTEXES
@@ -141,6 +149,21 @@ config DEBUG_SPINLOCK_SLEEP
          If you say Y here, various routines which may sleep will become very
          noisy if they are called with a spinlock held.
 
+config DEBUG_LOCKING_API_SELFTESTS
+       bool "Locking API boot-time self-tests"
+       depends on DEBUG_KERNEL
+       help
+         Say Y here if you want the kernel to run a short self-test during
+         bootup. The self-test checks whether common types of locking bugs
+         are detected by debugging mechanisms or not. (if you disable
+         lock debugging then those bugs wont be detected of course.)
+         The following locking APIs are covered: spinlocks, rwlocks,
+         mutexes and rwsems.
+
+config STACKTRACE
+       bool
+       depends on STACKTRACE_SUPPORT
+
 config DEBUG_KOBJECT
        bool "kobject debugging"
        depends on DEBUG_KERNEL
@@ -196,7 +219,7 @@ config DEBUG_VM
 
 config FRAME_POINTER
        bool "Compile the kernel with frame pointers"
-       depends on DEBUG_KERNEL && (X86 || CRIS || M68K || M68KNOMMU || FRV || UML)
+       depends on DEBUG_KERNEL && (X86 || CRIS || M68K || M68KNOMMU || FRV || UML || S390)
        default y if DEBUG_INFO && UML
        help
          If you say Y here the resulting kernel image will be slightly larger