1 files changed, 31 insertions, 1 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index d5ca9a5a31c6..d57b12f59c8c 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -653,6 +653,21 @@ config DEBUG_NOTIFIERS
           This is a relatively cheap check but if you care about maximum
           performance, say N.
 
+config DEBUG_CREDENTIALS
+        bool "Debug credential management"
+        depends on DEBUG_KERNEL
+        help
+          Enable this to turn on some debug checking for credential
+          management.  The additional code keeps track of the number of
+          pointers from task_structs to any given cred struct, and checks to
+          see that this number never exceeds the usage count of the cred
+          struct.
+
+          Furthermore, if SELinux is enabled, this also checks that the
+          security pointer in the cred struct is never seen to be invalid.
+
+          If unsure, say N.
+
 #
 # Select this config option from the architecture Kconfig, if it
 # it is preferred to always offer frame pointers as a config
@@ -725,7 +740,7 @@ config RCU_TORTURE_TEST_RUNNABLE
 
 config RCU_CPU_STALL_DETECTOR
         bool "Check for stalled CPUs delaying RCU grace periods"
-        depends on CLASSIC_RCU || TREE_RCU
+        depends on TREE_RCU || TREE_PREEMPT_RCU
         default n
         help
           This option causes RCU to printk information on which
@@ -790,6 +805,21 @@ config DEBUG_BLOCK_EXT_DEVT
 
           Say N if you are unsure.
 
+config DEBUG_FORCE_WEAK_PER_CPU
+        bool "Force weak per-cpu definitions"
+        depends on DEBUG_KERNEL
+        help
+          s390 and alpha require percpu variables in modules to be
+          defined weak to work around addressing range issue which
+          puts the following two restrictions on percpu variable
+          definitions.
+
+          1. percpu symbols must be unique whether static or not
+          2. percpu variables can't be defined inside a function
+
+          To ensure that generic code follows the above rules, this
+          option forces all percpu variables to be defined as weak.
+
 config LKDTM
         tristate "Linux Kernel Dump Test Tool Module"
         depends on DEBUG_KERNEL