uml-mmapper: BKL pushdown
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/um/drivers/mmapper_kern.c b/arch/um/drivers/mmapper_kern.c
index 67b2f55..eb24032 100644
--- a/arch/um/drivers/mmapper_kern.c
+++ b/arch/um/drivers/mmapper_kern.c
@@ -16,6 +16,7 @@
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/mm.h>
+#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include "mem_user.h"
@@ -77,6 +78,7 @@
static int mmapper_open(struct inode *inode, struct file *file)
{
+ cycle_kernel_lock();
return 0;
}