From 5ab0854dd77a520abe7c3b9c7770972fd3e61e90 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 20 May 2008 19:16:40 +0200
Subject: [PATCH] sbus-rtc: BKL pushdown

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/sbus/char/rtc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/sbus/char/rtc.c b/drivers/sbus/char/rtc.c
index 18d18f1a11..b042991715 100644
--- a/drivers/sbus/char/rtc.c
+++ b/drivers/sbus/char/rtc.c
@@ -12,6 +12,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/miscdevice.h>
@@ -213,6 +214,7 @@ static int rtc_open(struct inode *inode, struct file *file)
 {
 	int ret;
 
+	lock_kernel();
 	spin_lock_irq(&mostek_lock);
 	if (rtc_busy) {
 		ret = -EBUSY;
@@ -221,6 +223,7 @@ static int rtc_open(struct inode *inode, struct file *file)
 		ret = 0;
 	}
 	spin_unlock_irq(&mostek_lock);
+	unlock_kernel();
 
 	return ret;
 }
-- 
2.39.5