crypto-prng: BKL pushdown
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/s390/crypto/prng.c b/arch/s390/crypto/prng.c
index 0cfefdd..c238ee4 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 int prng_open(struct inode *inode, struct file *file)
{
+ cycle_kernel_lock();
return nonseekable_open(inode, file);
}