X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fs390%2Fchar%2Fmonwriter.c;h=4d71aa8c1a7956928e1354cd82f56a70d145c1e2;hb=9c31fd635ddfae6eb61712491770befa2ce1fdde;hp=a86c0534cd49f337dbceb8ef2dab3ac2e0115688;hpb=70ec75c5b8e0bda7a16fb387f91e08545f379a0e;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/s390/char/monwriter.c b/drivers/s390/char/monwriter.c
index a86c0534cd4..4d71aa8c1a7 100644
--- a/drivers/s390/char/monwriter.c
+++ b/drivers/s390/char/monwriter.c
@@ -12,6 +12,7 @@
 #include <linux/moduleparam.h>
 #include <linux/init.h>
 #include <linux/errno.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/miscdevice.h>
@@ -179,10 +180,12 @@ static int monwrite_open(struct inode *inode, struct file *filp)
 	monpriv = kzalloc(sizeof(struct mon_private), GFP_KERNEL);
 	if (!monpriv)
 		return -ENOMEM;
+	lock_kernel();
 	INIT_LIST_HEAD(&monpriv->list);
 	monpriv->hdr_to_read = sizeof(monpriv->hdr);
 	mutex_init(&monpriv->thread_mutex);
 	filp->private_data = monpriv;
+	unlock_kernel();
 	return nonseekable_open(inode, filp);
 }