Re: [PATCH net-next v6] net: psample: Introduce stubs to remove NIC driver dependency

On Mon, 2021-02-01 at 17:14 -0800, Jakub Kicinski wrote:

On Mon,  1 Feb 2021 10:04:12 +0800 Chris Mi wrote:

quoted

In order to send sampled packets to userspace, NIC driver calls
psample api directly. But it creates a hard dependency on module
psample. Introduce psample_ops to remove the hard dependency.
It is initialized when psample module is loaded and set to NULL
when the module is unloaded.

Reported-by: kernel test robot <redacted>
Signed-off-by: Chris Mi <redacted>
Reviewed-by: Jiri Pirko <redacted>

The necessity of making this change is not obvious (you can fix the
distro scripts instead), you did not include a clarification in the
commit message even though two people asked you why it's needed and 
on top of that you keep sending code which doesn't build. 

Please consider this change rejected and do not send a v7.

Jakub, it is not only about installation dependencies, the issue is
more critical than this, 

We had some other issues with similar dependency problem where
mlx5_core had hard dependency with netfilter, firewalld when disabled,
removes netfilter and all its dependencies including mlx5, this is a no
go for our users.

Again, having a hard dependency between a hardware driver and a
peripheral module in the kernel is a bad design.