audit: make audit_inode take struct filename

Keep a pointer to the audit_names "slot" in struct filename.

Have all of the audit_inode callers pass a struct filename ponter to
audit_inode instead of a string pointer. If the aname field is already
populated, then we can skip walking the list altogether and just use it
directly.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/fs.h b/include/linux/fs.h
index b6b10e7..4aa7160 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2196,9 +2196,11 @@
 #endif /* CONFIG_FILE_LOCKING */
 
 /* fs/open.c */
+struct audit_names;
 struct filename {
-	const char *name;		/* pointer to actual string */
-	const __user char *uptr;	/* original userland pointer */
+	const char		*name;	/* pointer to actual string */
+	const __user char	*uptr;	/* original userland pointer */
+	struct audit_names	*aname;
 };
 
 extern int do_truncate(struct dentry *, loff_t start, unsigned int time_attrs,