[PATCH 1/3] Typedefs the read and write functions in cftype

[Pavel Emelyanov <xemul-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>]

This is just to reduce the code amount in the future.

Signed-off-by: Pavel Emelyanov <xemul-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>

---

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 8747932..0635004 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -178,6 +178,15 @@ struct css_set {
  *	- the 'cftype' of the file is file->f_dentry->d_fsdata
  */
 
+struct cftype;
+
+typedef ssize_t (*cft_read) (struct cgroup *cont, struct cftype *cft,
+			 struct file *file,
+			 char __user *buf, size_t nbytes, loff_t *ppos);
+typedef ssize_t (*cft_write) (struct cgroup *cont, struct cftype *cft,
+			  struct file *file,
+			  const char __user *buf, size_t nbytes, loff_t *ppos);
+
 #define MAX_CFTYPE_NAME 64
 struct cftype {
 	/* By convention, the name should begin with the name of the
@@ -185,18 +194,14 @@ struct cftype {
 	char name[MAX_CFTYPE_NAME];
 	int private;
 	int (*open) (struct inode *inode, struct file *file);
-	ssize_t (*read) (struct cgroup *cont, struct cftype *cft,
-			 struct file *file,
-			 char __user *buf, size_t nbytes, loff_t *ppos);
+	cft_read read;
 	/*
 	 * read_uint() is a shortcut for the common case of returning a
 	 * single integer. Use it in place of read()
 	 */
 	u64 (*read_uint) (struct cgroup *cont, struct cftype *cft);
-	ssize_t (*write) (struct cgroup *cont, struct cftype *cft,
-			  struct file *file,
-			  const char __user *buf, size_t nbytes, loff_t *ppos);
 
+	cft_write write;
 	/*
 	 * write_uint() is a shortcut for the common case of accepting
 	 * a single integer (as parsed by simple_strtoull) from