From 131c9cc832162bfe45be1065fa88d1ec2c165a3d Mon Sep 17 00:00:00 2001
From: Alessandro Zummo <a.zummo@towertech.it>
Date: Thu, 3 Apr 2014 14:50:09 -0700
Subject: [PATCH] rtc: verify a critical argument to rtc_update_irq() before
 using it

This small addition to the core simplifies code in the drivers and makes
them more robust when handling shared IRQs.

Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
Reading git-format-patch failed