[PATCH] Replace regular code with appropriate calls to container_of()

Replace a small number of expressions with a call to the "container_of()"
macro.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

security/selinux/hooks.c

@@ -2654,7 +2654,7 @@ static int selinux_file_send_sigiotask(struct task_struct *tsk,
 	struct file_security_struct *fsec;
 
 	/* struct fown_struct is never outside the context of a struct file */
-        file = (struct file *)((long)fown - offsetof(struct file,f_owner));
+        file = container_of(fown, struct file, f_owner);
 
 	tsec = tsk->security;
 	fsec = file->f_security;