netdev - Re: [PATCH net-next v7 2/5] rust: net::phy add module_phy

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Date: Mon, 20 Nov 2023 15:13:23 +0100
From: Andrew Lunn <andrew@...n.ch>
To: FUJITA Tomonori <fujita.tomonori@...il.com>
Cc: benno.lossin@...ton.me, boqun.feng@...il.com, netdev@...r.kernel.org,
	rust-for-linux@...r.kernel.org, tmgross@...ch.edu,
	miguel.ojeda.sandonis@...il.com, wedsonaf@...il.com
Subject: Re: [PATCH net-next v7 2/5] rust: net::phy add module_phy_driver
 macro

> The Rust ax88796b driver doesn't export anything. The Rust and C
> drivers handle the device_table in the same way when they are built as
> a module.
> 
> $ grep __mod_mdio /proc/kallsyms
> ffffffffa0358058 r __mod_mdio__phydev_device_table [ax88796b_rust]
> 
> $ grep __mod_mdio /proc/kallsyms
> ffffffffa0288010 d __mod_mdio__asix_tbl_device_table	[ax88796b]

I checked what r and d mean. If they are upper case, they are
exported. Lower case means they are not exported.

My laptop is using the realtek PHY driver:

0000000000000000 r __mod_mdio__realtek_tbl_device_table	[realtek]

Also lower r.

Looking at all the symbols for the realtek driver, all the symbols use
lower case. Nothing is exported.

Is that what you see for the ax88796b_rust?

	Andrew