From 135fe10f9fb9fba981f60c5526e37900f52c9705 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 20 May 2008 19:15:45 +0200
Subject: [PATCH] crypto-prng: BKL pushdown

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/s390/crypto/prng.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/s390/crypto/prng.c b/arch/s390/crypto/prng.c
index 0cfefddd8375..c238ee4aa038 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);
 }