cgroup: fix comments

[linux-2.6-omap-h63xx.git] / include / linux / cgroup.h

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index d8e92223a79c5bc126235f86ede207a4a8cb9850..2ebf7afedd9fa0cb621c144202792493ed4b80ab 100644 (file)
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -14,6 +14,7 @@
 #include <linux/nodemask.h>
 #include <linux/rcupdate.h>
 #include <linux/cgroupstats.h>
+#include <linux/prio_heap.h>
 
 #ifdef CONFIG_CGROUPS
 
@@ -174,7 +175,7 @@ struct css_set {
  *
  *
  * When reading/writing to a file:
- *     - the cgroup to use in file->f_dentry->d_parent->d_fsdata
+ *     - the cgroup to use is file->f_dentry->d_parent->d_fsdata
  *     - the 'cftype' of the file is file->f_dentry->d_fsdata
  */
 
@@ -207,6 +208,14 @@ struct cftype {
        int (*release) (struct inode *inode, struct file *file);
 };
 
+struct cgroup_scanner {
+       struct cgroup *cg;
+       int (*test_task)(struct task_struct *p, struct cgroup_scanner *scan);
+       void (*process_task)(struct task_struct *p,
+                       struct cgroup_scanner *scan);
+       struct ptr_heap *heap;
+};
+
 /* Add a new file to the given cgroup directory. Should only be
  * called by subsystems from within a populate() method */
 int cgroup_add_file(struct cgroup *cont, struct cgroup_subsys *subsys,
@@ -299,11 +308,17 @@ struct cgroup_iter {
  *    returns NULL or until you want to end the iteration
  *
  * 3) call cgroup_iter_end() to destroy the iterator.
+ *
+ * Or, call cgroup_scan_tasks() to iterate through every task in a cpuset.
+ *    - cgroup_scan_tasks() holds the css_set_lock when calling the test_task()
+ *      callback, but not while calling the process_task() callback.
  */
 void cgroup_iter_start(struct cgroup *cont, struct cgroup_iter *it);
 struct task_struct *cgroup_iter_next(struct cgroup *cont,
                                        struct cgroup_iter *it);
 void cgroup_iter_end(struct cgroup *cont, struct cgroup_iter *it);
+int cgroup_scan_tasks(struct cgroup_scanner *scan);
+int cgroup_attach_task(struct cgroup *, struct task_struct *);
 
 #else /* !CONFIG_CGROUPS */