Signed-off-by: Jordi Pujol <jordipujolp@gmail.com>

 cgroup: Add write permission for the group of users.

--- linux-2.6.37/kernel/cgroup.c
+++ linux-2.6.37/kernel/cgroup.c	2011-01-30 15:16:00.556562499 +0100
@@ -1441,7 +1441,7 @@ static int cgroup_set_super(struct super
 static int cgroup_get_rootdir(struct super_block *sb)
 {
 	struct inode *inode =
-		cgroup_new_inode(S_IFDIR | S_IRUGO | S_IXUGO | S_IWUSR, sb);
+		cgroup_new_inode(S_IFDIR | S_IRUGO | S_IXUGO | S_IWUSR | S_IWGRP, sb);
 	struct dentry *dentry;
 
 	if (!inode)
@@ -2265,9 +2265,9 @@ static int cgroup_create_dir(struct cgro
  * @cft: the control file in question
  *
  * returns cft->mode if ->mode is not 0
- * returns S_IRUGO|S_IWUSR if it has both a read and a write handler
+ * returns S_IRUGO|S_IWUSR|S_IWGRP if it has both a read and a write handler
  * returns S_IRUGO if it has only a read handler
- * returns S_IWUSR if it has only a write hander
+ * returns S_IWUSR|S_IWGRP if it has only a write hander
  */
 static mode_t cgroup_file_mode(const struct cftype *cft)
 {
@@ -2281,8 +2281,10 @@ static mode_t cgroup_file_mode(const str
 		mode |= S_IRUGO;
 
 	if (cft->write || cft->write_u64 || cft->write_s64 ||
-	    cft->write_string || cft->trigger)
+	    cft->write_string || cft->trigger) {
 		mode |= S_IWUSR;
+		mode |= S_IWGRP;
+	}
 
 	return mode;
 }
@@ -3244,7 +3246,7 @@ static struct cftype files[] = {
 		.open = cgroup_tasks_open,
 		.write_u64 = cgroup_tasks_write,
 		.release = cgroup_pidlist_release,
-		.mode = S_IRUGO | S_IWUSR,
+		.mode = S_IRUGO | S_IWUSR | S_IWGRP,
 	},
 	{
 		.name = CGROUP_FILE_GENERIC_PREFIX "procs",