[PATCH] rust: module: remove deprecated author key

[Guilherme Giacomo Simoes <trintaeoitogc@gmail.com>]

Commit 38559da6afb2 ("rust: module: introduce `authors` key") introduced
a new `authors` key to support multiple module authors, while keeping
the old `author` key for backward compatibility.

Now that all in-tree modules have migrated to `authors`, remove:
1. The deprecated `author` key support from the module macro
2. Legacy `author` entries from remaining modules

Signed-off-by: Guilherme Giacomo Simoes <trintaeoitogc@gmail.com>
---
 drivers/cpufreq/rcpufreq_dt.rs        | 2 +-
 drivers/gpu/drm/nova/nova.rs          | 2 +-
 drivers/gpu/nova-core/nova_core.rs    | 2 +-
 rust/kernel/firmware.rs               | 2 +-
 rust/macros/module.rs                 | 6 ------
 samples/rust/rust_configfs.rs         | 2 +-
 samples/rust/rust_driver_auxiliary.rs | 2 +-
 7 files changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/cpufreq/rcpufreq_dt.rs b/drivers/cpufreq/rcpufreq_dt.rs
index 94ed81644fe1..bdf4b844de42 100644
--- a/drivers/cpufreq/rcpufreq_dt.rs
+++ b/drivers/cpufreq/rcpufreq_dt.rs
@@ -220,7 +220,7 @@ fn probe(
 module_platform_driver! {
     type: CPUFreqDTDriver,
     name: "cpufreq-dt",
-    author: "Viresh Kumar <viresh.kumar@linaro.org>",
+    authors: ["Viresh Kumar <viresh.kumar@linaro.org>"],
     description: "Generic CPUFreq DT driver",
     license: "GPL v2",
 }
diff --git a/drivers/gpu/drm/nova/nova.rs b/drivers/gpu/drm/nova/nova.rs
index 902876aa14d1..64fd670e99e1 100644
--- a/drivers/gpu/drm/nova/nova.rs
+++ b/drivers/gpu/drm/nova/nova.rs
@@ -12,7 +12,7 @@
 kernel::module_auxiliary_driver! {
     type: NovaDriver,
     name: "Nova",
-    author: "Danilo Krummrich",
+    authors: ["Danilo Krummrich"],
     description: "Nova GPU driver",
     license: "GPL v2",
 }
diff --git a/drivers/gpu/nova-core/nova_core.rs b/drivers/gpu/nova-core/nova_core.rs
index 618632f0abcc..f405d7a99c28 100644
--- a/drivers/gpu/nova-core/nova_core.rs
+++ b/drivers/gpu/nova-core/nova_core.rs
@@ -13,7 +13,7 @@
 kernel::module_pci_driver! {
     type: driver::NovaCore,
     name: "NovaCore",
-    author: "Danilo Krummrich",
+    authors: ["Danilo Krummrich"],
     description: "Nova Core GPU driver",
     license: "GPL v2",
     firmware: [],
diff --git a/rust/kernel/firmware.rs b/rust/kernel/firmware.rs
index 2494c96e105f..ed2fc20cba9b 100644
--- a/rust/kernel/firmware.rs
+++ b/rust/kernel/firmware.rs
@@ -181,7 +181,7 @@ unsafe impl Sync for Firmware {}
 /// module! {
 ///    type: MyModule,
 ///    name: "module_firmware_test",
-///    author: "Rust for Linux",
+///    authors: ["Rust for Linux"],
 ///    description: "module_firmware! test module",
 ///    license: "GPL",
 /// }
diff --git a/rust/macros/module.rs b/rust/macros/module.rs
index 2ddd2eeb2852..5dd276a2e5cb 100644
--- a/rust/macros/module.rs
+++ b/rust/macros/module.rs
@@ -94,7 +94,6 @@ struct ModuleInfo {
     type_: String,
     license: String,
     name: String,
-    author: Option<String>,
     authors: Option<Vec<String>>,
     description: Option<String>,
     alias: Option<Vec<String>>,
@@ -108,7 +107,6 @@ fn parse(it: &mut token_stream::IntoIter) -> Self {
         const EXPECTED_KEYS: &[&str] = &[
             "type",
             "name",
-            "author",
             "authors",
             "description",
             "license",
@@ -134,7 +132,6 @@ fn parse(it: &mut token_stream::IntoIter) -> Self {
             match key.as_str() {
                 "type" => info.type_ = expect_ident(it),
                 "name" => info.name = expect_string_ascii(it),
-                "author" => info.author = Some(expect_string(it)),
                 "authors" => info.authors = Some(expect_string_array(it)),
                 "description" => info.description = Some(expect_string(it)),
                 "license" => info.license = expect_string_ascii(it),
@@ -179,9 +176,6 @@ pub(crate) fn module(ts: TokenStream) -> TokenStream {
     // Rust does not allow hyphens in identifiers, use underscore instead.
     let ident = info.name.replace('-', "_");
     let mut modinfo = ModInfoBuilder::new(ident.as_ref());
-    if let Some(author) = info.author {
-        modinfo.emit("author", &author);
-    }
     if let Some(authors) = info.authors {
         for author in authors {
             modinfo.emit("author", &author);
diff --git a/samples/rust/rust_configfs.rs b/samples/rust/rust_configfs.rs
index 60ddbe62cda3..af04bfa35cb2 100644
--- a/samples/rust/rust_configfs.rs
+++ b/samples/rust/rust_configfs.rs
@@ -14,7 +14,7 @@
 module! {
     type: RustConfigfs,
     name: "rust_configfs",
-    author: "Rust for Linux Contributors",
+    authors: ["Rust for Linux Contributors"],
     description: "Rust configfs sample",
     license: "GPL",
 }
diff --git a/samples/rust/rust_driver_auxiliary.rs b/samples/rust/rust_driver_auxiliary.rs
index 3e15e6d002bb..abf3d55ed249 100644
--- a/samples/rust/rust_driver_auxiliary.rs
+++ b/samples/rust/rust_driver_auxiliary.rs
@@ -114,7 +114,7 @@ fn init(module: &'static kernel::ThisModule) -> impl PinInit<Self, Error> {
 module! {
     type: SampleModule,
     name: "rust_driver_auxiliary",
-    author: "Danilo Krummrich",
+    authors: ["Danilo Krummrich"],
     description: "Rust auxiliary driver",
     license: "GPL v2",
 }
-- 
2.34.1