typedef int __kernel_ssize_t; typedef __kernel_ssize_t ssize_t; int printk(const char * fmt, ...) __attribute__ ((format (printf, 1, 2))); static ssize_t smb_file_read(struct file * file, char * buf, size_t count, loff_t *ppos) { ssize_t status; printk("<5>" "%s: " "%s/%s validation failed, error=%Zd\n", (__func__) , (dentry)->d_parent->d_name.name,(dentry)->d_name.name, status);