bdev_file_inode
struct inode *bd_inode = bdev_file_inode(file);
struct inode *bd_inode = bdev_file_inode(file);
struct inode *bd_inode = bdev_file_inode(iocb->ki_filp);
struct inode *inode = bdev_file_inode(file);
if (bdev_read_only(I_BDEV(bdev_file_inode(file))))