new helper: file_inode(file)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/udf/dir.c

@@ -186,7 +186,7 @@ out:
 
 static int udf_readdir(struct file *filp, void *dirent, filldir_t filldir)
 {
-	struct inode *dir = filp->f_path.dentry->d_inode;
+	struct inode *dir = file_inode(filp);
 	int result;
 
 	if (filp->f_pos == 0) {

fs/udf/file.c

@@ -139,7 +139,7 @@ static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
 {
 	ssize_t retval;
 	struct file *file = iocb->ki_filp;
-	struct inode *inode = file->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(file);
 	int err, pos;
 	size_t count = iocb->ki_left;
 	struct udf_inode_info *iinfo = UDF_I(inode);
@@ -178,7 +178,7 @@ static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
 
 long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
-	struct inode *inode = filp->f_dentry->d_inode;
+	struct inode *inode = file_inode(filp);
 	long old_block, new_block;
 	int result = -EINVAL;