cgroup: move cgroup files under kernel/cgroup/

They're growing to be too many and planned to get split further.  Move
them under their own directory.

 kernel/cgroup.c		-> kernel/cgroup/cgroup.c
 kernel/cgroup_freezer.c	-> kernel/cgroup/freezer.c
 kernel/cgroup_pids.c		-> kernel/cgroup/pids.c
 kernel/cpuset.c		-> kernel/cgroup/cpuset.c

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Acked-by: Zefan Li <lizefan@huawei.com>

6 files changed, 6 insertions, 4 deletions

diff --git a/kernel/Makefile b/kernel/Makefile
index 12c679f..b302b47 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -64,10 +64,7 @@ obj-$(CONFIG_KEXEC) += kexec.o
 obj-$(CONFIG_KEXEC_FILE) += kexec_file.o
 obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
 obj-$(CONFIG_COMPAT) += compat.o
-obj-$(CONFIG_CGROUPS) += cgroup.o
-obj-$(CONFIG_CGROUP_FREEZER) += cgroup_freezer.o
-obj-$(CONFIG_CGROUP_PIDS) += cgroup_pids.o
-obj-$(CONFIG_CPUSETS) += cpuset.o
+obj-$(CONFIG_CGROUPS) += cgroup/
 obj-$(CONFIG_UTS_NS) += utsname.o
 obj-$(CONFIG_USER_NS) += user_namespace.o
 obj-$(CONFIG_PID_NS) += pid_namespace.o
diff --git a/kernel/cgroup/Makefile b/kernel/cgroup/Makefile
new file mode 100644
index 0000000..4d561a5
--- /dev/null
+++ b/kernel/cgroup/Makefile
@@ -0,0 +1,5 @@
+obj-y := cgroup.o
+
+obj-$(CONFIG_CGROUP_FREEZER) += freezer.o
+obj-$(CONFIG_CGROUP_PIDS) += pids.o
+obj-$(CONFIG_CPUSETS) += cpuset.o
diff --git a/kernel/cgroup.c b/kernel/cgroup/cgroup.c
index 1a815f2..1a815f2 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup/cgroup.c
diff --git a/kernel/cpuset.c b/kernel/cgroup/cpuset.c
index b308888..b308888 100644
--- a/kernel/cpuset.c
+++ b/kernel/cgroup/cpuset.c
diff --git a/kernel/cgroup_freezer.c b/kernel/cgroup/freezer.c
index 1b72d56..1b72d56 100644
--- a/kernel/cgroup_freezer.c
+++ b/kernel/cgroup/freezer.c
diff --git a/kernel/cgroup_pids.c b/kernel/cgroup/pids.c
index 2bd6737..2bd6737 100644
--- a/kernel/cgroup_pids.c
+++ b/kernel/cgroup/pids.c