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authorArnd Bergmann <arnd@arndb.de>2008-05-20 19:16:03 +0200
committerJonathan Corbet <corbet@lwn.net>2008-06-20 14:05:57 -0600
commitb0e54f7c477ad24fa0d49baed942c5a5909c748b (patch)
treecf69ed8d72b97079f68303ae9ed4bc686b6f31b3 /drivers/char/ip27-rtc.c
parent6b0ee363b294c3724224909dcb0b80f7dac3dfd6 (diff)
ip27-rtc: BKL pushdown
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/char/ip27-rtc.c')
-rw-r--r--drivers/char/ip27-rtc.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/char/ip27-rtc.c b/drivers/char/ip27-rtc.c
index 86e6538a77b0..ec9d0443d92c 100644
--- a/drivers/char/ip27-rtc.c
+++ b/drivers/char/ip27-rtc.c
@@ -27,6 +27,7 @@
#include <linux/bcd.h>
#include <linux/module.h>
#include <linux/kernel.h>
+#include <linux/smp_lock.h>
#include <linux/types.h>
#include <linux/miscdevice.h>
#include <linux/ioport.h>
@@ -163,15 +164,18 @@ static long rtc_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
static int rtc_open(struct inode *inode, struct file *file)
{
+ lock_kernel();
spin_lock_irq(&rtc_lock);
if (rtc_status & RTC_IS_OPEN) {
spin_unlock_irq(&rtc_lock);
+ unlock_kernel();
return -EBUSY;
}
rtc_status |= RTC_IS_OPEN;
spin_unlock_irq(&rtc_lock);
+ unlock_kernel();
return 0;
}