summaryrefslogtreecommitdiff
path: root/drivers/char/rtc.c
diff options
context:
space:
mode:
authorArnd Bergmann <arnd@arndb.de>2008-05-20 19:16:37 +0200
committerJonathan Corbet <corbet@lwn.net>2008-07-02 15:06:24 -0600
commit4333deee6b7a5a82afb9e700e76cb46e68fde68d (patch)
tree0dee106feae97fe882044b6ea832336726d45c04 /drivers/char/rtc.c
parentf29b889edef0c3ab98732c84247c790a1583cb94 (diff)
rtc: BKL pushdown
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/char/rtc.c')
-rw-r--r--drivers/char/rtc.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c
index 5f80a9dff573..10f06a6bfeb5 100644
--- a/drivers/char/rtc.c
+++ b/drivers/char/rtc.c
@@ -73,6 +73,7 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
#include <linux/sysctl.h>
#include <linux/wait.h>
#include <linux/bcd.h>
@@ -733,6 +734,7 @@ static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
* needed here. Or anywhere else in this driver. */
static int rtc_open(struct inode *inode, struct file *file)
{
+ lock_kernel();
spin_lock_irq(&rtc_lock);
if (rtc_status & RTC_IS_OPEN)
@@ -742,10 +744,12 @@ static int rtc_open(struct inode *inode, struct file *file)
rtc_irq_data = 0;
spin_unlock_irq(&rtc_lock);
+ unlock_kernel();
return 0;
out_busy:
spin_unlock_irq(&rtc_lock);
+ unlock_kernel();
return -EBUSY;
}