rust: module: introduce `authors` key

In the `module!` macro, the `author` field is currently of type `String`.

Since modules can have multiple authors, this limitation prevents
specifying more than one.

Add an `authors` field as `Option<Vec<String>>` to allow creating
modules with multiple authors, and change the documentation and all
current users to use it. Eventually, the single `author` field may
be removed.

[ The `modinfo` key needs to still be `author`; otherwise, tooling
  may not work properly, e.g.:

      $ modinfo --author samples/rust/rust_print.ko
      Rust for Linux Contributors

  I have also kept the original `author` field (undocumented), so
  that we can drop it more easily in a kernel cycle or two.

    - Miguel ]

Suggested-by: Miguel Ojeda <ojeda@kernel.org>
Link: https://github.com/Rust-for-Linux/linux/issues/244
Reviewed-by: Charalampos Mitrodimas <charmitro@posteo.net>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org>
Signed-off-by: Guilherme Giacomo Simoes <trintaeoitogc@gmail.com>
Link: https://lore.kernel.org/r/20250309175712.845622-2-trintaeoitogc@gmail.com
[ Fixed `modinfo` key. Kept `author` field. Reworded message
  accordingly. Updated my email. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

6 files changed, 6 insertions, 6 deletions

diff --git a/samples/rust/rust_driver_faux.rs b/samples/rust/rust_driver_faux.rs
index 048c6cb98b29..378bab4b587d 100644
--- a/samples/rust/rust_driver_faux.rs
+++ b/samples/rust/rust_driver_faux.rs
@@ -7,7 +7,7 @@ use kernel::{c_str, faux, prelude::*, Module};
 module! {
     type: SampleModule,
     name: "rust_faux_driver",
-    author: "Lyude Paul",
+    authors: ["Lyude Paul"],
     description: "Rust faux device sample",
     license: "GPL",
 }
diff --git a/samples/rust/rust_driver_pci.rs b/samples/rust/rust_driver_pci.rs
index 1fb6e44f3395..364a0660a743 100644
--- a/samples/rust/rust_driver_pci.rs
+++ b/samples/rust/rust_driver_pci.rs
@@ -104,7 +104,7 @@ impl Drop for SampleDriver {
 kernel::module_pci_driver! {
     type: SampleDriver,
     name: "rust_driver_pci",
-    author: "Danilo Krummrich",
+    authors: ["Danilo Krummrich"],
     description: "Rust PCI driver",
     license: "GPL v2",
 }
diff --git a/samples/rust/rust_driver_platform.rs b/samples/rust/rust_driver_platform.rs
index 8120609e2940..f7a0f1b29d1d 100644
--- a/samples/rust/rust_driver_platform.rs
+++ b/samples/rust/rust_driver_platform.rs
@@ -43,7 +43,7 @@ impl Drop for SampleDriver {
 kernel::module_platform_driver! {
     type: SampleDriver,
     name: "rust_driver_platform",
-    author: "Danilo Krummrich",
+    authors: ["Danilo Krummrich"],
     description: "Rust Platform driver",
     license: "GPL v2",
 }
diff --git a/samples/rust/rust_minimal.rs b/samples/rust/rust_minimal.rs
index 4aaf117bf8e3..1fc7a1be6b6d 100644
--- a/samples/rust/rust_minimal.rs
+++ b/samples/rust/rust_minimal.rs
@@ -7,7 +7,7 @@ use kernel::prelude::*;
 module! {
     type: RustMinimal,
     name: "rust_minimal",
-    author: "Rust for Linux Contributors",
+    authors: ["Rust for Linux Contributors"],
     description: "Rust minimal sample",
     license: "GPL",
 }
diff --git a/samples/rust/rust_misc_device.rs b/samples/rust/rust_misc_device.rs
index 40ad7266c225..d3785e7c0330 100644
--- a/samples/rust/rust_misc_device.rs
+++ b/samples/rust/rust_misc_device.rs
@@ -116,7 +116,7 @@ const RUST_MISC_DEV_SET_VALUE: u32 = _IOW::<i32>('|' as u32, 0x82);
 module! {
     type: RustMiscDeviceModule,
     name: "rust_misc_device",
-    author: "Lee Jones",
+    authors: ["Lee Jones"],
     description: "Rust misc device sample",
     license: "GPL",
 }
diff --git a/samples/rust/rust_print_main.rs b/samples/rust/rust_print_main.rs
index 7e8af5f176a3..8ea95e8c2f36 100644
--- a/samples/rust/rust_print_main.rs
+++ b/samples/rust/rust_print_main.rs
@@ -8,7 +8,7 @@ use kernel::prelude::*;
 module! {
     type: RustPrint,
     name: "rust_print",
-    author: "Rust for Linux Contributors",
+    authors: ["Rust for Linux Contributors"],
     description: "Rust printing macros sample",
     license: "GPL",
 }