[PATCH] proc: Use struct pid not struct task_ref

Incrementally update my proc-dont-lock-task_structs-indefinitely patches so
that they work with struct pid instead of struct task_ref.

Mostly this is a straight 1-1 substitution.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 37f1648..146a434 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -10,7 +10,6 @@
  */
 
 #include <linux/proc_fs.h>
-#include <linux/task_ref.h>
 
 struct vmalloc_info {
 	unsigned long	used;
@@ -51,14 +50,14 @@
 
 int proc_init_inodecache(void);
 
-static inline struct task_ref *proc_tref(struct inode *inode)
+static inline struct pid *proc_pid(struct inode *inode)
 {
-	return PROC_I(inode)->tref;
+	return PROC_I(inode)->pid;
 }
 
 static inline struct task_struct *get_proc_task(struct inode *inode)
 {
-	return get_tref_task(proc_tref(inode));
+	return get_pid_task(proc_pid(inode), PIDTYPE_PID);
 }
 
 static inline int proc_fd(struct inode *inode)