lib: turn CONFIG_STACKTRACE into an actual option.
I was puzzled why /proc/$$/stack had disappeared, until I figured out I
had disabled the last debug option that did a 'select STACKTRACE'. This
patch makes the option show up at config time, so it can be enabled
without enabling any of the more heavyweight debug options.
Signed-off-by: Dave Jones <davej@redhat.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 1b233fc..a285900 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1036,8 +1036,13 @@
either tracing or lock debugging.
config STACKTRACE
- bool
+ bool "Stack backtrace support"
depends on STACKTRACE_SUPPORT
+ help
+ This option causes the kernel to create a /proc/pid/stack for
+ every process, showing its current stack trace.
+ It is also used by various kernel debugging features that require
+ stack trace generation.
config DEBUG_KOBJECT
bool "kobject debugging"
