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[net] rust: net::phy scope ThisModule usage in the module_phy_driver macro

Message ID 20241113174438.327414-3-sergeantsagara@protonmail.com (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series [net] rust: net::phy scope ThisModule usage in the module_phy_driver macro | expand

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Context Check Description
netdev/series_format success Single patches do not need cover letters
netdev/tree_selection success Clearly marked for net
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag present in non-next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 3 this patch: 3
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 13 of 13 maintainers
netdev/build_clang success Errors and warnings before: 3 this patch: 3
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 3 this patch: 3
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 16 lines checked
netdev/build_clang_rust fail Link
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-11-14--03-00 (tests: 782)

Commit Message

Rahul Rameshbabu Nov. 13, 2024, 5:45 p.m. UTC 
Similar to the use of $crate::Module, ThisModule should be referred to as
$crate::ThisModule in the macro evaluation. The reason the macro previously
did not cause any errors is because all the users of the macro would use
kernel::prelude::*, bringing ThisModule into scope.

Fixes: 2fe11d5ab35d ("rust: net::phy add module_phy_driver macro")
Signed-off-by: Rahul Rameshbabu <sergeantsagara@protonmail.com>
---

Notes:
    How I came up with this change:
    
    I was working on my own rust bindings and rust driver when I compared my
    macro_rule to the one used for module_phy_driver. I noticed, if I made a
    driver that does not use kernel::prelude::*, that the ThisModule type
    identifier used in the macro would cause an error without being scoped in
    the macro_rule. I believe the correct implementation for the macro is one
    where the types used are correctly expanded with needed scopes.

 rust/kernel/net/phy.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)


base-commit: 73af53d82076bbe184d9ece9e14b0dc8599e6055
diff mbox series

Patch

diff --git a/rust/kernel/net/phy.rs b/rust/kernel/net/phy.rs
index 910ce867480a..80f9f571b88c 100644
--- a/rust/kernel/net/phy.rs
+++ b/rust/kernel/net/phy.rs
@@ -837,7 +837,7 @@  const fn as_int(&self) -> u32 {
 ///         [::kernel::net::phy::create_phy_driver::<PhySample>()];
 ///
 ///     impl ::kernel::Module for Module {
-///         fn init(module: &'static ThisModule) -> Result<Self> {
+///         fn init(module: &'static ::kernel::ThisModule) -> Result<Self> {
 ///             let drivers = unsafe { &mut DRIVERS };
 ///             let mut reg = ::kernel::net::phy::Registration::register(
 ///                 module,
@@ -899,7 +899,7 @@  struct Module {
                 [$($crate::net::phy::create_phy_driver::<$driver>()),+];
 
             impl $crate::Module for Module {
-                fn init(module: &'static ThisModule) -> Result<Self> {
+                fn init(module: &'static $crate::ThisModule) -> Result<Self> {
                     // SAFETY: The anonymous constant guarantees that nobody else can access
                     // the `DRIVERS` static. The array is used only in the C side.
                     let drivers = unsafe { &mut DRIVERS };