block: implement CONFIG_DEBUG_BLOCK_EXT_DEVT

[linux-2.6-omap-h63xx.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 0b504814e378067ff120b266e5b26c9fdd6fb90e..5a536f703a833a23aa358e5b157c993644e1f87e 100644 (file)
--- 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