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-rw-r--r--arch/s390/crypto/prng.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/s390/crypto/prng.c b/arch/s390/crypto/prng.c
index 0cfefddd8375..eca724d229ec 100644
--- a/arch/s390/crypto/prng.c
+++ b/arch/s390/crypto/prng.c
@@ -6,6 +6,7 @@
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/kernel.h>
+#include <linux/smp_lock.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
@@ -48,6 +49,7 @@ static unsigned char parm_block[32] = {
static int prng_open(struct inode *inode, struct file *file)
{
+ cycle_kernel_lock();
return nonseekable_open(inode, file);
}
@@ -185,11 +187,8 @@ static int __init prng_init(void)
prng_seed(16);
ret = misc_register(&prng_dev);
- if (ret) {
- printk(KERN_WARNING
- "Could not register misc device for PRNG.\n");
+ if (ret)
goto out_buf;
- }
return 0;
out_buf: