Hook up group scheduler with control groups

Enable "cgroup" (formerly containers) based fair group scheduling.  This
will let administrator create arbitrary groups of tasks (using "cgroup"
pseudo filesystem) and control their cpu bandwidth usage.

[akpm@linux-foundation.org: fix cpp condition]
Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Signed-off-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Paul Menage <menage@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/init/Kconfig b/init/Kconfig
index 0007d1b..541382d 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -334,6 +334,16 @@
 	  This option will choose userid as the basis for grouping
 	  tasks, thus providing equal CPU bandwidth to each user.
 
+config FAIR_CGROUP_SCHED
+	bool "Control groups"
+ 	depends on CGROUPS
+ 	help
+	  This option allows you to create arbitrary task groups
+	  using the "cgroup" pseudo filesystem and control
+	  the cpu bandwidth allocated to each such task group.
+	  Refer to Documentation/cgroups.txt for more information
+	  on "cgroup" pseudo filesystem.
+
 endchoice
 
 config SYSFS_DEPRECATED