trivial: fix where cgroup documentation is not correctly referred to

cgroup documentation was moved to Documentation/cgroups/. There are some
places that still refer to Documentation/controllers/,
Documentation/cgroups.txt and Documentation/cpusets.txt. Fix those.

Signed-off-by: Thadeu Lima de Souza Cascardo <[e-mail]>
Reviewed-by: Li Zefan <[e-mail]>
Acked-by: Paul Menage <[e-mail]>
Signed-off-by: Jiri Kosina <[e-mail]>

Documentation/00-INDEX

···
 	- describes the cache/TLB flushing interfaces Linux uses.
 cdrom/
 	- directory with information on the CD-ROM drivers that Linux has.
+cgroups/
+	- cgroups features, including cpusets and memory controller.
 connector/
 	- docs on the netlink based userspace<->kernel space communication mod.
 console/
···
 	- document describing how CPU load statistics are collected.
 cpuidle/
 	- info on CPU_IDLE, CPU idle state management subsystem.
-cpusets.txt
-	- documents the cpusets feature; assign CPUs and Mem to a set of tasks.
 cputopology.txt
 	- documentation on how CPU topology info is exported via sysfs.
 cris/

Documentation/cgroups/00-INDEX

···
+00-INDEX
+	- this file
+cgroups.txt
+	- Control Groups definition, implementation details, examples and API.
+cpuacct.txt
+	- CPU Accounting Controller; account CPU usage for groups of tasks.
+cpusets.txt
+	- documents the cpusets feature; assign CPUs and Mem to a set of tasks.
+devices.txt
+	- Device Whitelist Controller; description, interface and security.
+freezer-subsystem.txt
+	- checkpointing; rationale to not use signals, interface.
+memcg_test.txt
+	- Memory Resource Controller; implementation details.
+memory.txt
+	- Memory Resource Controller; design, accounting, interface, testing.
+resource_counter.txt
+	- Resource Counter API.

Documentation/kernel-parameters.txt

···
 	nosoftlockup	[KNL] Disable the soft-lockup detector.
 
 	noswapaccount	[KNL] Disable accounting of swap in memory resource
-			controller. (See Documentation/controllers/memory.txt)
+			controller. (See Documentation/cgroups/memory.txt)
 
 	nosync		[HW,M68K] Disables sync negotiation for all devices.
 
···
 
 	relax_domain_level=
 			[KNL, SMP] Set scheduler's default relax_domain_level.
-			See Documentation/cpusets.txt.
+			See Documentation/cgroups/cpusets.txt.
 
 	reserve=	[KNL,BUGS] Force the kernel to ignore some iomem area
 

Documentation/scheduler/sched-rt-group.txt

···
 to control the CPU time reserved for each control group instead.
 
 For more information on working with control groups, you should read
-Documentation/cgroups.txt as well.
+Documentation/cgroups/cgroups.txt as well.
 
 Group settings are checked against the following limits in order to keep the configuration
 schedulable:

Documentation/vm/numa_memory_policy.txt

···
 document attempts to describe the concepts and APIs of the 2.6 memory policy
 support.
 
-Memory policies should not be confused with cpusets (Documentation/cpusets.txt)
+Memory policies should not be confused with cpusets
+(Documentation/cgroups/cpusets.txt)
 which is an administrative mechanism for restricting the nodes from which
 memory may be allocated by a set of processes. Memory policies are a
 programming interface that a NUMA-aware application can take advantage of.  When

Documentation/vm/page_migration

···
 
 Larger installations usually partition the system using cpusets into
 sections of nodes. Paul Jackson has equipped cpusets with the ability to
-move pages when a task is moved to another cpuset (See ../cpusets.txt).
+move pages when a task is moved to another cpuset (See
+Documentation/cgroups/cpusets.txt).
 Cpusets allows the automation of process locality. If a task is moved to
 a new cpuset then also all its pages are moved with it so that the
 performance of the process does not sink dramatically. Also the pages

Documentation/x86/x86_64/fake-numa-for-cpusets

···
 assign them to cpusets and their attached tasks.  This is a way of limiting the
 amount of system memory that are available to a certain class of tasks.
 
-For more information on the features of cpusets, see Documentation/cpusets.txt.
+For more information on the features of cpusets, see
+Documentation/cgroups/cpusets.txt.
 There are a number of different configurations you can use for your needs.  For
 more information on the numa=fake command line option and its various ways of
 configuring fake nodes, see Documentation/x86/x86_64/boot-options.txt.
···
 	On node 3 totalpages: 131072
 
 Now following the instructions for mounting the cpusets filesystem from
-Documentation/cpusets.txt, you can assign fake nodes (i.e. contiguous memory
+Documentation/cgroups/cpusets.txt, you can assign fake nodes (i.e. contiguous memory
 address spaces) to individual cpusets:
 
 	[root@xroads /]# mkdir exampleset

include/linux/cgroup.h

···
 /* Return true if the cgroup is a descendant of the current cgroup */
 int cgroup_is_descendant(const struct cgroup *cgrp);
 
-/* Control Group subsystem type. See Documentation/cgroups.txt for details */
+/*
+ * Control Group subsystem type.
+ * See Documentation/cgroups/cgroups.txt for details
+ */
 
 struct cgroup_subsys {
 	struct cgroup_subsys_state *(*create)(struct cgroup_subsys *ss,

init/Kconfig

···
 	select MM_OWNER
 	help
 	  Provides a memory resource controller that manages both anonymous
-	  memory and page cache. (See Documentation/controllers/memory.txt)
+	  memory and page cache. (See Documentation/cgroups/memory.txt)
 
 	  Note that setting this option increases fixed memory overhead
 	  associated with each page of memory in the system. By this,