[CIFS] Fix build break

struct task_struct * oplockThread = NULL;

extern struct task_struct * dnotifyThread; /* remove sparse warning */

struct task_struct * dnotifyThread = NULL;

static struct super_operations cifs_super_ops; 

unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;

module_param(CIFSMaxBufSize, int, 0);

MODULE_PARM_DESC(CIFSMaxBufSize,"Network buffer size (not including header). Default: 16384 Range: 8192 to 130048");