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rust: net::phy always define device_table in module_phy_driver macro

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device_table in module_phy_driver macro is defined only when the
driver is built as a module. So a PHY driver imports phy::DeviceId
module in the following way then hits `unused import` warning when
it's compiled as built-in:

 use kernel::net::phy::DeviceId;

 kernel::module_phy_driver! {
     drivers: [PhyQT2025],
     device_table: [
        DeviceId::new_with_driver::<PhyQT2025>(),
     ],

Put device_table in a const. It's not included in the kernel image if
unused (when the driver is compiled as built-in), and the compiler
doesn't complain.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://patch.msgid.link/20240930134038.1309-1-fujita.tomonori@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
FUJITA Tomonori 2024-09-30 13:40:37 +00:00 committed by Jakub Kicinski
parent 5fad1c1a09
commit 3ed8d344e0
1 changed files with 10 additions and 6 deletions
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16
rust/kernel/net/phy.rs
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@ -848,9 +848,7 @@ const fn as_int(&self) -> u32 {
/// }
/// };
///
/// #[cfg(MODULE)]
/// #[no_mangle]
/// static __mod_mdio__phydev_device_table: [::kernel::bindings::mdio_device_id; 2] = [
/// const _DEVICE_TABLE: [::kernel::bindings::mdio_device_id; 2] = [
/// ::kernel::bindings::mdio_device_id {
/// phy_id: 0x00000001,
/// phy_id_mask: 0xffffffff,
@ -860,6 +858,9 @@ const fn as_int(&self) -> u32 {
/// phy_id_mask: 0,
/// },
/// ];
/// #[cfg(MODULE)]
/// #[no_mangle]
/// static __mod_mdio__phydev_device_table: [::kernel::bindings::mdio_device_id; 2] = _DEVICE_TABLE;
/// ```
#[macro_export]
macro_rules! module_phy_driver {
@ -871,9 +872,7 @@ macro_rules! module_phy_driver {
(@device_table [$($dev:expr),+]) => {
// SAFETY: C will not read off the end of this constant since the last element is zero.
#[cfg(MODULE)]
#[no_mangle]
static __mod_mdio__phydev_device_table: [$crate::bindings::mdio_device_id;
const _DEVICE_TABLE: [$crate::bindings::mdio_device_id;
$crate::module_phy_driver!(@count_devices $($dev),+) + 1] = [
$($dev.mdio_device_id()),+,
$crate::bindings::mdio_device_id {
@ -881,6 +880,11 @@ macro_rules! module_phy_driver {
phy_id_mask: 0
}
];
#[cfg(MODULE)]
#[no_mangle]
static __mod_mdio__phydev_device_table: [$crate::bindings::mdio_device_id;
$crate::module_phy_driver!(@count_devices $($dev),+) + 1] = _DEVICE_TABLE;
};
(drivers: [$($driver:ident),+ $(,)?], device_table: [$($dev:expr),+ $(,)?], $($f:tt)*) => {