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-rw-r--r--drivers/char/efirtc.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/char/efirtc.c b/drivers/char/efirtc.c
index 49233f58987..d57ca3e4e53 100644
--- a/drivers/char/efirtc.c
+++ b/drivers/char/efirtc.c
@@ -28,6 +28,7 @@
*/
+#include <linux/smp_lock.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/miscdevice.h>
@@ -272,6 +273,7 @@ efi_rtc_open(struct inode *inode, struct file *file)
* We do accept multiple open files at the same time as we
* synchronize on the per call operation.
*/
+ cycle_kernel_lock();
return 0;
}