ocfs2-stack_user: BKL pushdown

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/fs/ocfs2/stack_user.c b/fs/ocfs2/stack_user.c
index b503772cd0ec83f86a2b55aa5fa512cd8ce20c4a..cd120011104dddaae95cc013dba7fb0240347392 100644 (file)
--- a/fs/ocfs2/stack_user.c
+++ b/fs/ocfs2/stack_user.c
@@ -21,6 +21,7 @@
 #include <linux/fs.h>
 #include <linux/miscdevice.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 #include <linux/reboot.h>
 #include <asm/uaccess.h>
 
@@ -619,10 +620,12 @@ static int ocfs2_control_open(struct inode *inode, struct file *file)
                return -ENOMEM;
        p->op_this_node = -1;
 
+       lock_kernel();
        mutex_lock(&ocfs2_control_lock);
        file->private_data = p;
        list_add(&p->op_list, &ocfs2_control_private_list);
        mutex_unlock(&ocfs2_control_lock);
+       unlock_kernel();
 
        return 0;
 }