aboutsummaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
authorPekka Enberg <penberg@cs.helsinki.fi>2009-02-26 14:38:56 -0500
committerVegard Nossum <vegard.nossum@gmail.com>2009-06-15 09:49:17 -0400
commit0a4af3b09309049d8560f8ad558a1337bb4f7f32 (patch)
tree7b3f627f94a82248146bc19bd3bb4f641b897526 /arch
parent7d46d9e6dbffe8780aa8430a63543d3f7ba92860 (diff)
kmemcheck: make kconfig accessible for other architectures
The Kconfig options of kmemcheck are hidden under arch/x86 which makes porting to other architectures harder. To fix that, move the Kconfig bits to lib/Kconfig.kmemcheck and introduce a CONFIG_HAVE_ARCH_KMEMCHECK config option that architectures can define. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> [rebased for mainline inclusion] Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/Kconfig1
-rw-r--r--arch/x86/Kconfig.debug88
2 files changed, 1 insertions, 88 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 68f5578fe38e..711b214684ef 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -46,6 +46,7 @@ config X86
46 select HAVE_KERNEL_GZIP 46 select HAVE_KERNEL_GZIP
47 select HAVE_KERNEL_BZIP2 47 select HAVE_KERNEL_BZIP2
48 select HAVE_KERNEL_LZMA 48 select HAVE_KERNEL_LZMA
49 select HAVE_ARCH_KMEMCHECK
49 50
50config OUTPUT_FORMAT 51config OUTPUT_FORMAT
51 string 52 string
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 3951ebb5f843..d105f29bb6bb 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -260,94 +260,6 @@ config DEFAULT_IO_DELAY_TYPE
260 default IO_DELAY_TYPE_NONE 260 default IO_DELAY_TYPE_NONE
261endif 261endif
262 262
263menuconfig KMEMCHECK
264 bool "kmemcheck: trap use of uninitialized memory"
265 depends on DEBUG_KERNEL
266 depends on !X86_USE_3DNOW
267 depends on SLUB || SLAB
268 depends on !CC_OPTIMIZE_FOR_SIZE
269 depends on !FUNCTION_TRACER
270 select FRAME_POINTER
271 select STACKTRACE
272 default n
273 help
274 This option enables tracing of dynamically allocated kernel memory
275 to see if memory is used before it has been given an initial value.
276 Be aware that this requires half of your memory for bookkeeping and
277 will insert extra code at *every* read and write to tracked memory
278 thus slow down the kernel code (but user code is unaffected).
279
280 The kernel may be started with kmemcheck=0 or kmemcheck=1 to disable
281 or enable kmemcheck at boot-time. If the kernel is started with
282 kmemcheck=0, the large memory and CPU overhead is not incurred.
283
284choice
285 prompt "kmemcheck: default mode at boot"
286 depends on KMEMCHECK
287 default KMEMCHECK_ONESHOT_BY_DEFAULT
288 help
289 This option controls the default behaviour of kmemcheck when the
290 kernel boots and no kmemcheck= parameter is given.
291
292config KMEMCHECK_DISABLED_BY_DEFAULT
293 bool "disabled"
294 depends on KMEMCHECK
295
296config KMEMCHECK_ENABLED_BY_DEFAULT
297 bool "enabled"
298 depends on KMEMCHECK
299
300config KMEMCHECK_ONESHOT_BY_DEFAULT
301 bool "one-shot"
302 depends on KMEMCHECK
303 help
304 In one-shot mode, only the first error detected is reported before
305 kmemcheck is disabled.
306
307endchoice
308
309config KMEMCHECK_QUEUE_SIZE
310 int "kmemcheck: error queue size"
311 depends on KMEMCHECK
312 default 64
313 help
314 Select the maximum number of errors to store in the queue. Since
315 errors can occur virtually anywhere and in any context, we need a
316 temporary storage area which is guarantueed not to generate any
317 other faults. The queue will be emptied as soon as a tasklet may
318 be scheduled. If the queue is full, new error reports will be
319 lost.
320
321config KMEMCHECK_SHADOW_COPY_SHIFT
322 int "kmemcheck: shadow copy size (5 => 32 bytes, 6 => 64 bytes)"
323 depends on KMEMCHECK
324 range 2 8
325 default 5
326 help
327 Select the number of shadow bytes to save along with each entry of
328 the queue. These bytes indicate what parts of an allocation are
329 initialized, uninitialized, etc. and will be displayed when an
330 error is detected to help the debugging of a particular problem.
331
332config KMEMCHECK_PARTIAL_OK
333 bool "kmemcheck: allow partially uninitialized memory"
334 depends on KMEMCHECK
335 default y
336 help
337 This option works around certain GCC optimizations that produce
338 32-bit reads from 16-bit variables where the upper 16 bits are
339 thrown away afterwards. This may of course also hide some real
340 bugs.
341
342config KMEMCHECK_BITOPS_OK
343 bool "kmemcheck: allow bit-field manipulation"
344 depends on KMEMCHECK
345 default n
346 help
347 This option silences warnings that would be generated for bit-field
348 accesses where not all the bits are initialized at the same time.
349 This may also hide some real bugs.
350
351config DEBUG_BOOT_PARAMS 263config DEBUG_BOOT_PARAMS
352 bool "Debug boot parameters" 264 bool "Debug boot parameters"
353 depends on DEBUG_KERNEL 265 depends on DEBUG_KERNEL