config HAVE_ARCH_KMEMCHECK	bool if HAVE_ARCH_KMEMCHECK menuconfig KMEMCHECK	bool "kmemcheck: trap use of uninitialized memory"	depends on DEBUG_KERNEL	depends on !X86_USE_3DNOW	depends on SLUB || SLAB	depends on !CC_OPTIMIZE_FOR_SIZE	depends on !FUNCTION_TRACER	select FRAME_POINTER	select STACKTRACE	default n	help	  This option enables tracing of dynamically allocated kernel memory	  to see if memory is used before it has been given an initial value.	  Be aware that this requires half of your memory for bookkeeping and	  will insert extra code at *every* read and write to tracked memory	  thus slow down the kernel code (but user code is unaffected). 	  The kernel may be started with kmemcheck=0 or kmemcheck=1 to disable	  or enable kmemcheck at boot-time. If the kernel is started with	  kmemcheck=0, the large memory and CPU overhead is not incurred. choice	prompt "kmemcheck: default mode at boot"	depends on KMEMCHECK	default KMEMCHECK_ONESHOT_BY_DEFAULT	help	  This option controls the default behaviour of kmemcheck when the	  kernel boots and no kmemcheck= parameter is given. config KMEMCHECK_DISABLED_BY_DEFAULT	bool "disabled"	depends on KMEMCHECK config KMEMCHECK_ENABLED_BY_DEFAULT	bool "enabled"	depends on KMEMCHECK config KMEMCHECK_ONESHOT_BY_DEFAULT	bool "one-shot"	depends on KMEMCHECK	help	  In one-shot mode, only the first error detected is reported before	  kmemcheck is disabled. endchoice config KMEMCHECK_QUEUE_SIZE	int "kmemcheck: error queue size"	depends on KMEMCHECK	default 64	help	  Select the maximum number of errors to store in the queue. Since	  errors can occur virtually anywhere and in any context, we need a	  temporary storage area which is guarantueed not to generate any	  other faults. The queue will be emptied as soon as a tasklet may	  be scheduled. If the queue is full, new error reports will be	  lost. config KMEMCHECK_SHADOW_COPY_SHIFT	int "kmemcheck: shadow copy size (5 => 32 bytes, 6 => 64 bytes)"	depends on KMEMCHECK	range 2 8	default 5	help	  Select the number of shadow bytes to save along with each entry of	  the queue. These bytes indicate what parts of an allocation are	  initialized, uninitialized, etc. and will be displayed when an	  error is detected to help the debugging of a particular problem. config KMEMCHECK_PARTIAL_OK	bool "kmemcheck: allow partially uninitialized memory"	depends on KMEMCHECK	default y	help	  This option works around certain GCC optimizations that produce	  32-bit reads from 16-bit variables where the upper 16 bits are	  thrown away afterwards. This may of course also hide some real	  bugs. config KMEMCHECK_BITOPS_OK	bool "kmemcheck: allow bit-field manipulation"	depends on KMEMCHECK	default n	help	  This option silences warnings that would be generated for bit-field	  accesses where not all the bits are initialized at the same time.	  This may also hide some real bugs. endif