[PATCH 2/7] cgroup: fix comments

[Li Zefan]

fix:
- comments about need_forkexit_callback
- comments about release agent
- typo and comment style, etc.

Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
---
 include/linux/cgroup.h |    2 +-
 kernel/cgroup.c        |   44 +++++++++++++++++++++-----------------------
 2 files changed, 22 insertions(+), 24 deletions(-)

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index ff9055f..2ebf7af 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -175,7 +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
  */
 
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 4766bb6..0c35022 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -113,9 +113,9 @@ static int root_count;
 #define dummytop (&rootnode.top_cgroup)
 
 /* This flag indicates whether tasks in the fork and exit paths should
- * take callback_mutex and check for fork/exit handlers to call. This
- * avoids us having to do extra work in the fork/exit path if none of the
- * subsystems need to be called.
+ * check for fork/exit handlers to call. This avoids us having to do
+ * extra work in the fork/exit path if none of the subsystems need to
+ * be called.
  */
 static int need_forkexit_callback;
 
@@ -507,8 +507,8 @@ static struct css_set *find_css_set(
  * critical pieces of code here.  The exception occurs on cgroup_exit(),
  * when a task in a notify_on_release cgroup exits.  Then cgroup_mutex
  * is taken, and if the cgroup count is zero, a usermode call made
- * to /sbin/cgroup_release_agent with the name of the cgroup (path
- * relative to the root of cgroup file system) as the argument.
+ * to the release agent with the name of the cgroup (path relative to
+ * the root of cgroup file system) as the argument.
  *
  * A cgroup can only be deleted if both its 'count' of using tasks
  * is zero, and its list of 'children' cgroups is empty.  Since all
@@ -521,7 +521,7 @@ static struct css_set *find_css_set(
  *
  * The need for this exception arises from the action of
  * cgroup_attach_task(), which overwrites one tasks cgroup pointer with
- * another.  It does so using cgroup_mutexe, however there are
+ * another.  It does so using cgroup_mutex, however there are
  * several performance critical places that need to reference
  * task->cgroup without the expense of grabbing a system global
  * mutex.  Therefore except as noted below, when dereferencing or, as
@@ -1192,7 +1192,7 @@ static void get_first_subsys(const struct cgroup *cgrp,
  * Attach task 'tsk' to cgroup 'cgrp'
  *
  * Call holding cgroup_mutex.  May take task_lock of
- * the task 'pid' during call.
+ * the task 'tsk' during call.
  */
 int cgroup_attach_task(struct cgroup *cgrp, struct task_struct *tsk)
 {
@@ -1584,12 +1584,11 @@ static int cgroup_create_file(struct dentry *dentry, int mode,
 }
 
 /*
- *	cgroup_create_dir - create a directory for an object.
- *	cgrp:	the cgroup we create the directory for.
- *		It must have a valid ->parent field
- *		And we are going to fill its ->dentry field.
- *	dentry: dentry of the new cgroup
- *	mode:	mode to set on new directory.
+ * cgroup_create_dir - create a directory for an object.
+ * @cgrp: the cgroup we create the directory for. It must have a valid
+ *        ->parent field. And we are going to fill its ->dentry field.
+ * @dentry: dentry of the new cgroup
+ * @mode: mode to set on new directory.
  */
 static int cgroup_create_dir(struct cgroup *cgrp, struct dentry *dentry,
 				int mode)
@@ -2199,12 +2198,12 @@ static void init_cgroup_css(struct cgroup_subsys_state *css,
 }
 
 /*
- *	cgroup_create - create a cgroup
- *	parent:	cgroup that will be parent of the new cgroup.
- *	name:		name of the new cgroup. Will be strcpy'ed.
- *	mode:		mode to set on new inode
+ * cgroup_create - create a cgroup
+ * @parent: cgroup that will be parent of the new cgroup
+ * @dentry: dentry of the new cgroup
+ * @mode: mode to set on new inode
  *
- *	Must be called with the mutex on the parent inode held
+ * Must be called with the mutex on the parent inode held
  */
 
 static long cgroup_create(struct cgroup *parent, struct dentry *dentry,
@@ -2349,13 +2348,12 @@ static int cgroup_rmdir(struct inode *unused_dir, struct dentry *dentry)
 	parent = cgrp->parent;
 	root = cgrp->root;
 	sb = root->sb;
+
 	/*
-	 * Call pre_destroy handlers of subsys
+	 * Call pre_destroy handlers of subsys. Notify subsystems
+	 * that rmdir() request comes.
 	 */
 	cgroup_call_pre_destroy(cgrp);
-	/*
-	 * Notify subsyses that rmdir() request comes.
-	 */
 
 	if (cgroup_has_css_refs(cgrp)) {
 		mutex_unlock(&cgroup_mutex);
@@ -2618,7 +2616,7 @@ static struct file_operations proc_cgroupstats_operations = {
 
 /**
  * cgroup_fork - attach newly forked task to its parents cgroup.
- * @tsk: pointer to task_struct of forking parent process.
+ * @child: pointer to task_struct of forking parent process.
  *
  * Description: A task inherits its parent's cgroup at fork().
  *
-- 
1.5.4.rc3

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