Merge tag 'xarray-5.1-rc1' of git://git.infradead.org/users/willy/linux-dax

[uclinux-h8/linux.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index d765d36..0d9e817 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -17,6 +17,23 @@ config PRINTK_TIME
          The behavior is also controlled by the kernel command line
          parameter printk.time=1. See Documentation/admin-guide/kernel-parameters.rst
 
+config PRINTK_CALLER
+       bool "Show caller information on printks"
+       depends on PRINTK
+       help
+         Selecting this option causes printk() to add a caller "thread id" (if
+         in task context) or a caller "processor id" (if not in task context)
+         to every message.
+
+         This option is intended for environments where multiple threads
+         concurrently call printk() for many times, for it is difficult to
+         interpret without knowing where these lines (or sometimes individual
+         line which was divided into multiple lines due to race) came from.
+
+         Since toggling after boot makes the code racy, currently there is
+         no option to enable/disable at the kernel command line parameter or
+         sysfs interface.
+
 config CONSOLE_LOGLEVEL_DEFAULT
        int "Default console loglevel (1-15)"
        range 1 15
@@ -179,6 +196,7 @@ config DEBUG_INFO_REDUCED
 config DEBUG_INFO_SPLIT
        bool "Produce split debuginfo in .dwo files"
        depends on DEBUG_INFO
+       depends on $(cc-option,-gsplit-dwarf)
        help
          Generate debug info into separate .dwo files. This significantly
          reduces the build directory size for builds with DEBUG_INFO,
@@ -194,6 +212,7 @@ config DEBUG_INFO_SPLIT
 config DEBUG_INFO_DWARF4
        bool "Generate dwarf4 debuginfo"
        depends on DEBUG_INFO
+       depends on $(cc-option,-gdwarf-4)
        help
          Generate dwarf4 debug info. This requires recent versions
          of gcc and gdb. It makes the debug information larger.
@@ -1637,42 +1656,6 @@ config PROVIDE_OHCI1394_DMA_INIT
 
          See Documentation/debugging-via-ohci1394.txt for more information.
 
-config DMA_API_DEBUG
-       bool "Enable debugging of DMA-API usage"
-       select NEED_DMA_MAP_STATE
-       help
-         Enable this option to debug the use of the DMA API by device drivers.
-         With this option you will be able to detect common bugs in device
-         drivers like double-freeing of DMA mappings or freeing mappings that
-         were never allocated.
-
-         This also attempts to catch cases where a page owned by DMA is
-         accessed by the cpu in a way that could cause data corruption.  For
-         example, this enables cow_user_page() to check that the source page is
-         not undergoing DMA.
-
-         This option causes a performance degradation.  Use only if you want to
-         debug device drivers and dma interactions.
-
-         If unsure, say N.
-
-config DMA_API_DEBUG_SG
-       bool "Debug DMA scatter-gather usage"
-       default y
-       depends on DMA_API_DEBUG
-       help
-         Perform extra checking that callers of dma_map_sg() have respected the
-         appropriate segment length/boundary limits for the given device when
-         preparing DMA scatterlists.
-
-         This is particularly likely to have been overlooked in cases where the
-         dma_map_sg() API is used for general bulk mapping of pages rather than
-         preparing literal scatter-gather descriptors, where there is a risk of
-         unexpected behaviour from DMA API implementations if the scatterlist
-         is technically out-of-spec.
-
-         If unsure, say N.
-
 menuconfig RUNTIME_TESTING_MENU
        bool "Runtime Testing"
        def_bool y
@@ -2016,6 +1999,16 @@ config TEST_OBJAGG
          (or module load).
 
 
+config TEST_STACKINIT
+       tristate "Test level of stack variable initialization"
+       help
+         Test if the kernel is zero-initializing stack variables and
+         padding. Coverage is controlled by compiler flags,
+         CONFIG_GCC_PLUGIN_STRUCTLEAK, CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF,
+         or CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL.
+
+         If unsure, say N.
+
 endif # RUNTIME_TESTING_MENU
 
 config MEMTEST