1 files changed, 0 insertions, 240 deletions
diff --git a/drivers/misc/uid_cputime.c b/drivers/misc/uid_cputime.c
deleted file mode 100644
index c1ad5246f564..000000000000
--- a/drivers/misc/uid_cputime.c
+++ /dev/null
@@ -1,240 +0,0 @@
-/* drivers/misc/uid_cputime.c
- *
- * Copyright (C) 2014 - 2015 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/atomic.h>
-#include <linux/err.h>
-#include <linux/hashtable.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/proc_fs.h>
-#include <linux/profile.h>
-#include <linux/sched.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-
-#define UID_HASH_BITS	10
-DECLARE_HASHTABLE(hash_table, UID_HASH_BITS);
-
-static DEFINE_MUTEX(uid_lock);
-static struct proc_dir_entry *parent;
-
-struct uid_entry {
-	uid_t uid;
-	cputime_t utime;
-	cputime_t stime;
-	cputime_t active_utime;
-	cputime_t active_stime;
-	struct hlist_node hash;
-};
-
-static struct uid_entry *find_uid_entry(uid_t uid)
-{
-	struct uid_entry *uid_entry;
-	hash_for_each_possible(hash_table, uid_entry, hash, uid) {
-		if (uid_entry->uid == uid)
-			return uid_entry;
-	}
-	return NULL;
-}
-
-static struct uid_entry *find_or_register_uid(uid_t uid)
-{
-	struct uid_entry *uid_entry;
-
-	uid_entry = find_uid_entry(uid);
-	if (uid_entry)
-		return uid_entry;
-
-	uid_entry = kzalloc(sizeof(struct uid_entry), GFP_ATOMIC);
-	if (!uid_entry)
-		return NULL;
-
-	uid_entry->uid = uid;
-
-	hash_add(hash_table, &uid_entry->hash, uid);
-
-	return uid_entry;
-}
-
-static int uid_stat_show(struct seq_file *m, void *v)
-{
-	struct uid_entry *uid_entry;
-	struct task_struct *task, *temp;
-	cputime_t utime;
-	cputime_t stime;
-	unsigned long bkt;
-
-	mutex_lock(&uid_lock);
-
-	hash_for_each(hash_table, bkt, uid_entry, hash) {
-		uid_entry->active_stime = 0;
-		uid_entry->active_utime = 0;
-	}
-
-	read_lock(&tasklist_lock);
-	do_each_thread(temp, task) {
-		uid_entry = find_or_register_uid(from_kuid_munged(
-			current_user_ns(), task_uid(task)));
-		if (!uid_entry) {
-			read_unlock(&tasklist_lock);
-			mutex_unlock(&uid_lock);
-			pr_err("%s: failed to find the uid_entry for uid %d\n",
-				__func__, from_kuid_munged(current_user_ns(),
-				task_uid(task)));
-			return -ENOMEM;
-		}
-		task_cputime_adjusted(task, &utime, &stime);
-		uid_entry->active_utime += utime;
-		uid_entry->active_stime += stime;
-	} while_each_thread(temp, task);
-	read_unlock(&tasklist_lock);
-
-	hash_for_each(hash_table, bkt, uid_entry, hash) {
-		cputime_t total_utime = uid_entry->utime +
-							uid_entry->active_utime;
-		cputime_t total_stime = uid_entry->stime +
-							uid_entry->active_stime;
-		seq_printf(m, "%d: %llu %llu\n", uid_entry->uid,
-			(unsigned long long)jiffies_to_msecs(
-				cputime_to_jiffies(total_utime)) * USEC_PER_MSEC,
-			(unsigned long long)jiffies_to_msecs(
-				cputime_to_jiffies(total_stime)) * USEC_PER_MSEC);
-	}
-
-	mutex_unlock(&uid_lock);
-	return 0;
-}
-
-static int uid_stat_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, uid_stat_show, PDE_DATA(inode));
-}
-
-static const struct file_operations uid_stat_fops = {
-	.open		= uid_stat_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-static int uid_remove_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, NULL, NULL);
-}
-
-static ssize_t uid_remove_write(struct file *file,
-			const char __user *buffer, size_t count, loff_t *ppos)
-{
-	struct uid_entry *uid_entry;
-	struct hlist_node *tmp;
-	char uids[128];
-	char *start_uid, *end_uid = NULL;
-	long int uid_start = 0, uid_end = 0;
-
-	if (count >= sizeof(uids))
-		count = sizeof(uids) - 1;
-
-	if (copy_from_user(uids, buffer, count))
-		return -EFAULT;
-
-	uids[count] = '\0';
-	end_uid = uids;
-	start_uid = strsep(&end_uid, "-");
-
-	if (!start_uid || !end_uid)
-		return -EINVAL;
-
-	if (kstrtol(start_uid, 10, &uid_start) != 0 ||
-		kstrtol(end_uid, 10, &uid_end) != 0) {
-		return -EINVAL;
-	}
-	mutex_lock(&uid_lock);
-
-	for (; uid_start <= uid_end; uid_start++) {
-		hash_for_each_possible_safe(hash_table, uid_entry, tmp,
-							hash, (uid_t)uid_start) {
-			if (uid_start == uid_entry->uid) {
-				hash_del(&uid_entry->hash);
-				kfree(uid_entry);
-			}
-		}
-	}
-
-	mutex_unlock(&uid_lock);
-	return count;
-}
-
-static const struct file_operations uid_remove_fops = {
-	.open		= uid_remove_open,
-	.release	= single_release,
-	.write		= uid_remove_write,
-};
-
-static int process_notifier(struct notifier_block *self,
-			unsigned long cmd, void *v)
-{
-	struct task_struct *task = v;
-	struct uid_entry *uid_entry;
-	cputime_t utime, stime;
-	uid_t uid;
-
-	if (!task)
-		return NOTIFY_OK;
-
-	mutex_lock(&uid_lock);
-	uid = from_kuid_munged(current_user_ns(), task_uid(task));
-	uid_entry = find_or_register_uid(uid);
-	if (!uid_entry) {
-		pr_err("%s: failed to find uid %d\n", __func__, uid);
-		goto exit;
-	}
-
-	task_cputime_adjusted(task, &utime, &stime);
-	uid_entry->utime += utime;
-	uid_entry->stime += stime;
-
-exit:
-	mutex_unlock(&uid_lock);
-	return NOTIFY_OK;
-}
-
-static struct notifier_block process_notifier_block = {
-	.notifier_call	= process_notifier,
-};
-
-static int __init proc_uid_cputime_init(void)
-{
-	hash_init(hash_table);
-
-	parent = proc_mkdir("uid_cputime", NULL);
-	if (!parent) {
-		pr_err("%s: failed to create proc entry\n", __func__);
-		return -ENOMEM;
-	}
-
-	proc_create_data("remove_uid_range", S_IWUGO, parent, &uid_remove_fops,
-					NULL);
-
-	proc_create_data("show_uid_stat", S_IRUGO, parent, &uid_stat_fops,
-					NULL);
-
-	profile_event_register(PROFILE_TASK_EXIT, &process_notifier_block);
-
-	return 0;
-}
-
-early_initcall(proc_uid_cputime_init);