X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fsbus%2Fchar%2Frtc.c;h=b0429917154da55c4f6cfea7abda0366718ac8af;hb=cadc723cc19ce6b881d973d3c04e25ebb83058e6;hp=18d18f1a114ec9cdf8d4443bb236d0cb9b8e0208;hpb=932c37c375cca25175f9b6acee4c75d7a96d985f;p=linux-2.6

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;
 }