From: Bartosz Golaszewski <brgl@xxxxxxxx> Date: Mon, 11 May 2020 17:07:50 +0200 > From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx> > > Appropriate amount of extra memory for private data is allocated at > the end of struct net_device. We have a helper - netdev_priv() - that > returns its address but we don't have the reverse: a function which > given the address of the private data, returns the address of struct > net_device. > > This has caused many drivers to store the pointer to net_device in > the private data structure, which basically means storing the pointer > to a structure in this very structure. > > This patch proposes to add priv_to_netdev() - a helper which converts > the address of the private data to the address of the associated > net_device. > > Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx> Sorry, please don't do this. We had this almost two decades ago and explicitly removed it intentionally. Store the back pointer in your software state just like everyone else does.
