1 files changed, 16 insertions, 0 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 0b504814e378..5a536f703a83 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -624,6 +624,22 @@ config BACKTRACE_SELF_TEST
 
           Say N if you are unsure.
 
+config DEBUG_BLOCK_EXT_DEVT
+        bool "Force extended block device numbers and spread them"
+        depends on DEBUG_KERNEL
+        depends on BLOCK
+        default y
+        help
+          Conventionally, block device numbers are allocated from
+          predetermined contiguous area.  However, extended block area
+          may introduce non-contiguous block device numbers.  This
+          option forces most block device numbers to be allocated from
+          the extended space and spreads them to discover kernel or
+          userland code paths which assume predetermined contiguous
+          device number allocation.
+
+          Say N if you are unsure.
+
 config LKDTM
         tristate "Linux Kernel Dump Test Tool Module"
         depends on DEBUG_KERNEL