Revert "ANDROID: cgroup: Add vendor hook to the cgroup"

This reverts commit 7d91e4ee.

Change-Id: Id28ff300b0141f07848a7c14e2dcb6fe734e4b15
Signed-off-by: T.J. Mercier <tjmercier@google.com>

drivers/android/vendor_hooks.c

@@ -60,7 +60,6 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_prepare_command);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_update_sysfs);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_send_command);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_compl_command);
-EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_cgroup_set_task);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_syscall_prctl_finished);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_send_uic_command);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ufs_send_tm_command);

include/trace/hooks/cgroup.h

@@ -7,14 +7,9 @@
 #define _TRACE_HOOK_CGROUP_H
 #include <trace/hooks/vendor_hooks.h>
 
-struct task_struct;
 struct cgroup_taskset;
 struct cgroup_subsys;
 struct cgroup_subsys_state;
-DECLARE_HOOK(android_vh_cgroup_set_task,
-	TP_PROTO(int ret, struct task_struct *task),
-	TP_ARGS(ret, task));
-
 DECLARE_HOOK(android_vh_cgroup_attach,
 	TP_PROTO(struct cgroup_subsys *ss, struct cgroup_taskset *tset),
 	TP_ARGS(ss, tset));

kernel/cgroup/cgroup-v1.c

@@ -17,7 +17,6 @@
 #include <linux/fs_parser.h>
 
 #include <trace/events/cgroup.h>
-#include <trace/hooks/cgroup.h>
 
 /*
  * pidlists linger the following amount before being destroyed.  The goal
@@ -528,7 +527,6 @@ static ssize_t __cgroup1_procs_write(struct kernfs_open_file *of,
 		goto out_finish;
 
 	ret = cgroup_attach_task(cgrp, task, threadgroup);
-	trace_android_vh_cgroup_set_task(ret, task);
 
 out_finish:
 	cgroup_procs_write_finish(task, locked);