diff options
| -rw-r--r-- | drivers/char/hw_random/core.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c index 662d60e44e9..e5d583c84e4 100644 --- a/drivers/char/hw_random/core.c +++ b/drivers/char/hw_random/core.c @@ -37,6 +37,7 @@ #include <linux/kernel.h> #include <linux/fs.h> #include <linux/sched.h> +#include <linux/smp_lock.h> #include <linux/init.h> #include <linux/miscdevice.h> #include <linux/delay.h> @@ -86,6 +87,7 @@ static int rng_dev_open(struct inode *inode, struct file *filp) return -EINVAL; if (filp->f_mode & FMODE_WRITE) return -EINVAL; + cycle_kernel_lock(); return 0; } |