とりあえず、な確認。排他制御なソレ static int yamanetoshi_open(struct inode *inode, struct file *file) { printk("yamanetoshi_open\n"); printk(" MINOR(inode->i_rdev): %d\n", MINOR(inode->i_rdev)); if(0 == MINOR(inode->i_rdev) % 2) { if(0 ==…