Merge tag 'imx-soc-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo...

[cascardo/linux.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index cb45f59..a285900 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -143,6 +143,30 @@ config DEBUG_INFO_REDUCED
          DEBUG_INFO build and compile times are reduced too.
          Only works with newer gcc versions.
 
+config DEBUG_INFO_SPLIT
+       bool "Produce split debuginfo in .dwo files"
+       depends on DEBUG_INFO
+       help
+         Generate debug info into separate .dwo files. This significantly
+         reduces the build directory size for builds with DEBUG_INFO,
+         because it stores the information only once on disk in .dwo
+         files instead of multiple times in object files and executables.
+         In addition the debug information is also compressed.
+
+         Requires recent gcc (4.7+) and recent gdb/binutils.
+         Any tool that packages or reads debug information would need
+         to know about the .dwo files and include them.
+         Incompatible with older versions of ccache.
+
+config DEBUG_INFO_DWARF4
+       bool "Generate dwarf4 debuginfo"
+       depends on DEBUG_INFO
+       help
+         Generate dwarf4 debug info. This requires recent versions
+         of gcc and gdb. It makes the debug information larger.
+         But it significantly improves the success of resolving
+         variables in gdb on optimized code.
+
 config ENABLE_WARN_DEPRECATED
        bool "Enable __deprecated logic"
        default y
@@ -868,6 +892,10 @@ config DEBUG_WW_MUTEX_SLOWPATH
         the full mutex checks enabled with (CONFIG_PROVE_LOCKING) this
         will test all possible w/w mutex interface abuse with the
         exception of simply not acquiring all the required locks.
+        Note that this feature can introduce significant overhead, so
+        it really should not be enabled in a production or distro kernel,
+        even a debug kernel.  If you are a driver writer, enable it.  If
+        you are a distro, do not.
 
 config DEBUG_LOCK_ALLOC
        bool "Lock debugging: detect incorrect freeing of live locks"
@@ -1008,8 +1036,13 @@ config TRACE_IRQFLAGS
          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"