TOMOYO: Add missing poll() hook.

Commit 1dae08c "TOMOYO: Add interactive enforcing mode." forgot to register
poll() hook. As a result, /usr/sbin/tomoyo-queryd was doing busy loop.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h
index b8b2dac..2ffad61 100644
--- a/security/tomoyo/common.h
+++ b/security/tomoyo/common.h
@@ -705,6 +705,8 @@
 int tomoyo_open_control(const u8 type, struct file *file);
 /* Close /sys/kernel/security/tomoyo/ interface. */
 int tomoyo_close_control(struct file *file);
+/* Poll operation for /sys/kernel/security/tomoyo/ interface. */
+int tomoyo_poll_control(struct file *file, poll_table *wait);
 /* Read operation for /sys/kernel/security/tomoyo/ interface. */
 int tomoyo_read_control(struct file *file, char __user *buffer,
 			const int buffer_len);