rtc-rtc-m41t80: BKL pushdown
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index a3e0880..0a19c06 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -17,6 +17,7 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/slab.h>
+#include <linux/smp_lock.h>
#include <linux/string.h>
#include <linux/i2c.h>
#include <linux/rtc.h>
@@ -655,12 +656,16 @@
static int wdt_open(struct inode *inode, struct file *file)
{
if (MINOR(inode->i_rdev) == WATCHDOG_MINOR) {
- if (test_and_set_bit(0, &wdt_is_open))
+ lock_kernel();
+ if (test_and_set_bit(0, &wdt_is_open)) {
+ unlock_kernel();
return -EBUSY;
+ }
/*
* Activate
*/
wdt_is_open = 1;
+ unlock_kernel();
return 0;
}
return -ENODEV;