From mboxrd@z Thu Jan  1 00:00:00 1970
From: matwey.kornilov@gmail.com (Matwey V. Kornilov)
Date: Sun, 10 Jul 2016 18:22:25 +0300
Subject: Proper way to get device file minor number from struct file
Message-ID: <nltp7i$5oi$1@ger.gmane.org>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

Hello,

I am looking through some legacy out of tree custom linux kernel device
driver.

It is full of lines like the following:

iminor(fp->f_dentry->d_inode)

here struct file *fp is an argument of callback of struct file_operations.

Documentation/filesystems/porting says:

"f_dentry is gone; use f_path.dentry, or, better yet, see if you can
avoid it entirely"

So, is there a proper compatible way to do the same?