uinput: BKL pushdown

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index a56ad4ba8fe2..2bcfa0b35061 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -37,6 +37,7 @@
 #include <linux/fs.h>
 #include <linux/miscdevice.h>
 #include <linux/uinput.h>
+#include <linux/smp_lock.h>
 
 static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 {
@@ -222,6 +223,7 @@ static int uinput_open(struct inode *inode, struct file *file)
         if (!newdev)
                 return -ENOMEM;
 
+        lock_kernel();
         mutex_init(&newdev->mutex);
         spin_lock_init(&newdev->requests_lock);
         init_waitqueue_head(&newdev->requests_waitq);
@@ -229,6 +231,7 @@ static int uinput_open(struct inode *inode, struct file *file)
         newdev->state = UIST_NEW_DEVICE;
 
         file->private_data = newdev;
+        unlock_kernel();
 
         return 0;
 }