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Message-ID: <20251110095025.1475896-16-ojeda@kernel.org>
Date: Mon, 10 Nov 2025 10:50:20 +0100
From: Miguel Ojeda <ojeda@...nel.org>
To: Miguel Ojeda <ojeda@...nel.org>,
Alex Gaynor <alex.gaynor@...il.com>,
Nathan Chancellor <nathan@...nel.org>,
Nicolas Schier <nicolas@...sle.eu>
Cc: Boqun Feng <boqun.feng@...il.com>,
Gary Guo <gary@...yguo.net>,
Björn Roy Baron <bjorn3_gh@...tonmail.com>,
Benno Lossin <lossin@...nel.org>,
Andreas Hindborg <a.hindborg@...nel.org>,
Alice Ryhl <aliceryhl@...gle.com>,
Trevor Gross <tmgross@...ch.edu>,
Danilo Krummrich <dakr@...nel.org>,
rust-for-linux@...r.kernel.org,
linux-kbuild@...r.kernel.org,
linux-kernel@...r.kernel.org,
patches@...ts.linux.dev
Subject: [PATCH 15/18] rust: syn: add SPDX License Identifiers
Originally, when the Rust upstream `alloc` standard library crate was
vendored in commit 057b8d257107 ("rust: adapt `alloc` crate to the
kernel"), the SPDX License Identifiers were added to every file so that
the license on those was clear.
Thus do the same for the `syn` crate.
This makes `scripts/spdxcheck.py` pass.
Signed-off-by: Miguel Ojeda <ojeda@...nel.org>
---
rust/syn/attr.rs | 2 ++
rust/syn/bigint.rs | 2 ++
rust/syn/buffer.rs | 2 ++
rust/syn/classify.rs | 2 ++
rust/syn/custom_keyword.rs | 2 ++
rust/syn/custom_punctuation.rs | 2 ++
rust/syn/data.rs | 2 ++
rust/syn/derive.rs | 2 ++
rust/syn/discouraged.rs | 2 ++
rust/syn/drops.rs | 2 ++
rust/syn/error.rs | 2 ++
rust/syn/export.rs | 2 ++
rust/syn/expr.rs | 2 ++
rust/syn/ext.rs | 2 ++
rust/syn/file.rs | 2 ++
rust/syn/fixup.rs | 2 ++
rust/syn/gen/clone.rs | 2 ++
rust/syn/gen/debug.rs | 2 ++
rust/syn/gen/eq.rs | 2 ++
rust/syn/gen/fold.rs | 2 ++
rust/syn/gen/hash.rs | 2 ++
rust/syn/gen/visit.rs | 2 ++
rust/syn/gen/visit_mut.rs | 2 ++
rust/syn/generics.rs | 2 ++
rust/syn/group.rs | 2 ++
rust/syn/ident.rs | 2 ++
rust/syn/item.rs | 2 ++
rust/syn/lib.rs | 2 ++
rust/syn/lifetime.rs | 2 ++
rust/syn/lit.rs | 2 ++
rust/syn/lookahead.rs | 2 ++
rust/syn/mac.rs | 2 ++
rust/syn/macros.rs | 2 ++
rust/syn/meta.rs | 2 ++
rust/syn/op.rs | 2 ++
rust/syn/parse.rs | 2 ++
rust/syn/parse_macro_input.rs | 2 ++
rust/syn/parse_quote.rs | 2 ++
rust/syn/pat.rs | 2 ++
rust/syn/path.rs | 2 ++
rust/syn/precedence.rs | 2 ++
rust/syn/print.rs | 2 ++
rust/syn/punctuated.rs | 2 ++
rust/syn/restriction.rs | 2 ++
rust/syn/scan_expr.rs | 2 ++
rust/syn/sealed.rs | 2 ++
rust/syn/span.rs | 2 ++
rust/syn/spanned.rs | 2 ++
rust/syn/stmt.rs | 2 ++
rust/syn/thread.rs | 2 ++
rust/syn/token.rs | 2 ++
rust/syn/tt.rs | 2 ++
rust/syn/ty.rs | 2 ++
rust/syn/verbatim.rs | 2 ++
rust/syn/whitespace.rs | 2 ++
55 files changed, 110 insertions(+)
diff --git a/rust/syn/attr.rs b/rust/syn/attr.rs
index 2bdf96ee7fa9..020b31f9de22 100644
--- a/rust/syn/attr.rs
+++ b/rust/syn/attr.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
#[cfg(feature = "parsing")]
use crate::error::Error;
#[cfg(feature = "parsing")]
diff --git a/rust/syn/bigint.rs b/rust/syn/bigint.rs
index 66aaa9372540..d706f9f515e9 100644
--- a/rust/syn/bigint.rs
+++ b/rust/syn/bigint.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use std::ops::{AddAssign, MulAssign};
// For implementing base10_digits() accessor on LitInt.
diff --git a/rust/syn/buffer.rs b/rust/syn/buffer.rs
index 7b6a504eeb7c..406f70db323c 100644
--- a/rust/syn/buffer.rs
+++ b/rust/syn/buffer.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
//! A stably addressed token buffer supporting efficient traversal based on a
//! cheaply copyable cursor.
diff --git a/rust/syn/classify.rs b/rust/syn/classify.rs
index 8eab19dbc37c..92a975bfe4aa 100644
--- a/rust/syn/classify.rs
+++ b/rust/syn/classify.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
#[cfg(feature = "full")]
use crate::expr::Expr;
#[cfg(any(feature = "printing", feature = "full"))]
diff --git a/rust/syn/custom_keyword.rs b/rust/syn/custom_keyword.rs
index cc4f632c981a..ff2c415f1aab 100644
--- a/rust/syn/custom_keyword.rs
+++ b/rust/syn/custom_keyword.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
/// Define a type that supports parsing and printing a given identifier as if it
/// were a keyword.
///
diff --git a/rust/syn/custom_punctuation.rs b/rust/syn/custom_punctuation.rs
index eef5f5458459..d37c0e9c3a1e 100644
--- a/rust/syn/custom_punctuation.rs
+++ b/rust/syn/custom_punctuation.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
/// Define a type that supports parsing and printing a multi-character symbol
/// as if it were a punctuation token.
///
diff --git a/rust/syn/data.rs b/rust/syn/data.rs
index 96db2a0b7c6f..c32c1366c1db 100644
--- a/rust/syn/data.rs
+++ b/rust/syn/data.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use crate::attr::Attribute;
use crate::expr::{Expr, Index, Member};
use crate::ident::Ident;
diff --git a/rust/syn/derive.rs b/rust/syn/derive.rs
index 3443ecfc05cb..27fd9f12c88c 100644
--- a/rust/syn/derive.rs
+++ b/rust/syn/derive.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use crate::attr::Attribute;
use crate::data::{Fields, FieldsNamed, Variant};
use crate::generics::Generics;
diff --git a/rust/syn/discouraged.rs b/rust/syn/discouraged.rs
index c8d6bfe89a14..2acd631ece84 100644
--- a/rust/syn/discouraged.rs
+++ b/rust/syn/discouraged.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
//! Extensions to the parsing API with niche applicability.
use crate::buffer::Cursor;
diff --git a/rust/syn/drops.rs b/rust/syn/drops.rs
index c54308f02c13..2c4ae333dad8 100644
--- a/rust/syn/drops.rs
+++ b/rust/syn/drops.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use std::iter;
use std::mem::ManuallyDrop;
use std::ops::{Deref, DerefMut};
diff --git a/rust/syn/error.rs b/rust/syn/error.rs
index 63310543a3b4..6fa0faf7f4e4 100644
--- a/rust/syn/error.rs
+++ b/rust/syn/error.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
#[cfg(feature = "parsing")]
use crate::buffer::Cursor;
use crate::thread::ThreadBound;
diff --git a/rust/syn/export.rs b/rust/syn/export.rs
index b9ea5c747b75..05dad324ba51 100644
--- a/rust/syn/export.rs
+++ b/rust/syn/export.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
#[doc(hidden)]
pub use std::clone::Clone;
#[doc(hidden)]
diff --git a/rust/syn/expr.rs b/rust/syn/expr.rs
index 1e49d9a6633e..deb918436604 100644
--- a/rust/syn/expr.rs
+++ b/rust/syn/expr.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use crate::attr::Attribute;
#[cfg(all(feature = "parsing", feature = "full"))]
use crate::error::Result;
diff --git a/rust/syn/ext.rs b/rust/syn/ext.rs
index 5cd79e863a9d..a9be9af42787 100644
--- a/rust/syn/ext.rs
+++ b/rust/syn/ext.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
//! Extension traits to provide parsing methods on foreign types.
use crate::buffer::Cursor;
diff --git a/rust/syn/file.rs b/rust/syn/file.rs
index 8956d82eee93..ce2d2680ca9a 100644
--- a/rust/syn/file.rs
+++ b/rust/syn/file.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use crate::attr::Attribute;
use crate::item::Item;
diff --git a/rust/syn/fixup.rs b/rust/syn/fixup.rs
index 6d2c3092d548..79b6d7618bb7 100644
--- a/rust/syn/fixup.rs
+++ b/rust/syn/fixup.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use crate::classify;
use crate::expr::Expr;
#[cfg(feature = "full")]
diff --git a/rust/syn/gen/clone.rs b/rust/syn/gen/clone.rs
index be2b698422da..dfb53182e378 100644
--- a/rust/syn/gen/clone.rs
+++ b/rust/syn/gen/clone.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
// This file is @generated by syn-internal-codegen.
// It is not intended for manual editing.
diff --git a/rust/syn/gen/debug.rs b/rust/syn/gen/debug.rs
index aa42e32c60ed..d594e57fcf21 100644
--- a/rust/syn/gen/debug.rs
+++ b/rust/syn/gen/debug.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
// This file is @generated by syn-internal-codegen.
// It is not intended for manual editing.
diff --git a/rust/syn/gen/eq.rs b/rust/syn/gen/eq.rs
index 128e8991eecc..79e9691b8c67 100644
--- a/rust/syn/gen/eq.rs
+++ b/rust/syn/gen/eq.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
// This file is @generated by syn-internal-codegen.
// It is not intended for manual editing.
diff --git a/rust/syn/gen/fold.rs b/rust/syn/gen/fold.rs
index 1f0afd31919d..0643a72f87ca 100644
--- a/rust/syn/gen/fold.rs
+++ b/rust/syn/gen/fold.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
// This file is @generated by syn-internal-codegen.
// It is not intended for manual editing.
diff --git a/rust/syn/gen/hash.rs b/rust/syn/gen/hash.rs
index 04f23453a117..fae2197a5610 100644
--- a/rust/syn/gen/hash.rs
+++ b/rust/syn/gen/hash.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
// This file is @generated by syn-internal-codegen.
// It is not intended for manual editing.
diff --git a/rust/syn/gen/visit.rs b/rust/syn/gen/visit.rs
index cd258fcde120..a82293c053d6 100644
--- a/rust/syn/gen/visit.rs
+++ b/rust/syn/gen/visit.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
// This file is @generated by syn-internal-codegen.
// It is not intended for manual editing.
diff --git a/rust/syn/gen/visit_mut.rs b/rust/syn/gen/visit_mut.rs
index 2bbd6895db75..08e134b43a92 100644
--- a/rust/syn/gen/visit_mut.rs
+++ b/rust/syn/gen/visit_mut.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
// This file is @generated by syn-internal-codegen.
// It is not intended for manual editing.
diff --git a/rust/syn/generics.rs b/rust/syn/generics.rs
index 0c77193da043..9f8df8a155e1 100644
--- a/rust/syn/generics.rs
+++ b/rust/syn/generics.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use crate::attr::Attribute;
use crate::expr::Expr;
use crate::ident::Ident;
diff --git a/rust/syn/group.rs b/rust/syn/group.rs
index 1534ae995dd5..57586c58fd92 100644
--- a/rust/syn/group.rs
+++ b/rust/syn/group.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use crate::error::Result;
use crate::parse::ParseBuffer;
use crate::token;
diff --git a/rust/syn/ident.rs b/rust/syn/ident.rs
index 8a8e8a50d9b0..2c4b56505bec 100644
--- a/rust/syn/ident.rs
+++ b/rust/syn/ident.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
#[cfg(feature = "parsing")]
use crate::lookahead;
diff --git a/rust/syn/item.rs b/rust/syn/item.rs
index 1716f5137afb..1ab10cf218a6 100644
--- a/rust/syn/item.rs
+++ b/rust/syn/item.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use crate::attr::Attribute;
use crate::data::{Fields, FieldsNamed, Variant};
use crate::derive::{Data, DataEnum, DataStruct, DataUnion, DeriveInput};
diff --git a/rust/syn/lib.rs b/rust/syn/lib.rs
index 79dc9e7c3324..b0006fd30b08 100644
--- a/rust/syn/lib.rs
+++ b/rust/syn/lib.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
//! [![github]](https://github.com/dtolnay/syn) [![crates-io]](https://crates.io/crates/syn) [![docs-rs]](crate)
//!
//! [github]: https://img.shields.io/badge/github-8da0cb?style=for-the-badge&labelColor=555555&logo=github
diff --git a/rust/syn/lifetime.rs b/rust/syn/lifetime.rs
index cc189d1ac91f..24bec7fe969d 100644
--- a/rust/syn/lifetime.rs
+++ b/rust/syn/lifetime.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
#[cfg(feature = "parsing")]
use crate::lookahead;
use proc_macro2::{Ident, Span};
diff --git a/rust/syn/lit.rs b/rust/syn/lit.rs
index 45c26d56fed3..1d2d8bdccfb1 100644
--- a/rust/syn/lit.rs
+++ b/rust/syn/lit.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
#[cfg(feature = "parsing")]
use crate::lookahead;
#[cfg(feature = "parsing")]
diff --git a/rust/syn/lookahead.rs b/rust/syn/lookahead.rs
index da13ffc47a7a..a7994cb6ae88 100644
--- a/rust/syn/lookahead.rs
+++ b/rust/syn/lookahead.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use crate::buffer::Cursor;
use crate::error::{self, Error};
use crate::sealed::lookahead::Sealed;
diff --git a/rust/syn/mac.rs b/rust/syn/mac.rs
index 15107801cfee..ce4b022b4d14 100644
--- a/rust/syn/mac.rs
+++ b/rust/syn/mac.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
#[cfg(feature = "parsing")]
use crate::error::Result;
#[cfg(feature = "parsing")]
diff --git a/rust/syn/macros.rs b/rust/syn/macros.rs
index 167f2cf260a7..8676f6492a9c 100644
--- a/rust/syn/macros.rs
+++ b/rust/syn/macros.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
#[cfg_attr(
not(any(feature = "full", feature = "derive")),
allow(unknown_lints, unused_macro_rules)
diff --git a/rust/syn/meta.rs b/rust/syn/meta.rs
index ffeeb2629f4f..2dd138e6dd55 100644
--- a/rust/syn/meta.rs
+++ b/rust/syn/meta.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
//! Facility for interpreting structured content inside of an `Attribute`.
use crate::error::{Error, Result};
diff --git a/rust/syn/op.rs b/rust/syn/op.rs
index 575d9faa1273..73dada3fae2d 100644
--- a/rust/syn/op.rs
+++ b/rust/syn/op.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
ast_enum! {
/// A binary operator: `+`, `+=`, `&`.
#[cfg_attr(docsrs, doc(cfg(any(feature = "full", feature = "derive"))))]
diff --git a/rust/syn/parse.rs b/rust/syn/parse.rs
index 57531005ac4e..c6f6c0eece02 100644
--- a/rust/syn/parse.rs
+++ b/rust/syn/parse.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
//! Parsing interface for parsing a token stream into a syntax tree node.
//!
//! Parsing in Syn is built on parser functions that take in a [`ParseStream`]
diff --git a/rust/syn/parse_macro_input.rs b/rust/syn/parse_macro_input.rs
index f0660aedd7df..2f977754d41c 100644
--- a/rust/syn/parse_macro_input.rs
+++ b/rust/syn/parse_macro_input.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
/// Parse the input TokenStream of a macro, triggering a compile error if the
/// tokens fail to parse.
///
diff --git a/rust/syn/parse_quote.rs b/rust/syn/parse_quote.rs
index 2db20597c436..7cc7b9b8fd75 100644
--- a/rust/syn/parse_quote.rs
+++ b/rust/syn/parse_quote.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
/// Quasi-quotation macro that accepts input like the [`quote!`] macro but uses
/// type inference to figure out a return type for those tokens.
///
diff --git a/rust/syn/pat.rs b/rust/syn/pat.rs
index 81a2f183f6b9..46edd63d5ed8 100644
--- a/rust/syn/pat.rs
+++ b/rust/syn/pat.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use crate::attr::Attribute;
use crate::expr::Member;
use crate::ident::Ident;
diff --git a/rust/syn/path.rs b/rust/syn/path.rs
index d2fcb9bc5d28..f2453bea4a3c 100644
--- a/rust/syn/path.rs
+++ b/rust/syn/path.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
#[cfg(feature = "parsing")]
use crate::error::Result;
use crate::expr::Expr;
diff --git a/rust/syn/precedence.rs b/rust/syn/precedence.rs
index 1891bfc202fd..cc4dba24a433 100644
--- a/rust/syn/precedence.rs
+++ b/rust/syn/precedence.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
#[cfg(all(feature = "printing", feature = "full"))]
use crate::attr::{AttrStyle, Attribute};
#[cfg(feature = "printing")]
diff --git a/rust/syn/print.rs b/rust/syn/print.rs
index 07409932677b..d73262cda060 100644
--- a/rust/syn/print.rs
+++ b/rust/syn/print.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use proc_macro2::TokenStream;
use quote::ToTokens;
diff --git a/rust/syn/punctuated.rs b/rust/syn/punctuated.rs
index ebaaa94f9a26..f79152940db6 100644
--- a/rust/syn/punctuated.rs
+++ b/rust/syn/punctuated.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
//! A punctuated sequence of syntax tree nodes separated by punctuation.
//!
//! Lots of things in Rust are punctuated sequences.
diff --git a/rust/syn/restriction.rs b/rust/syn/restriction.rs
index 6e6758f3cd73..b844f64c3a73 100644
--- a/rust/syn/restriction.rs
+++ b/rust/syn/restriction.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use crate::path::Path;
use crate::token;
diff --git a/rust/syn/scan_expr.rs b/rust/syn/scan_expr.rs
index 3d88cf06acea..a5fd1ddc1501 100644
--- a/rust/syn/scan_expr.rs
+++ b/rust/syn/scan_expr.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use self::{Action::*, Input::*};
use proc_macro2::{Delimiter, Ident, Spacing, TokenTree};
use syn::parse::{ParseStream, Result};
diff --git a/rust/syn/sealed.rs b/rust/syn/sealed.rs
index dc804742d12d..541df9623755 100644
--- a/rust/syn/sealed.rs
+++ b/rust/syn/sealed.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
#[cfg(feature = "parsing")]
pub(crate) mod lookahead {
pub trait Sealed: Copy {}
diff --git a/rust/syn/span.rs b/rust/syn/span.rs
index eb2779479aaa..e6d55b3ccd03 100644
--- a/rust/syn/span.rs
+++ b/rust/syn/span.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use proc_macro2::extra::DelimSpan;
use proc_macro2::{Delimiter, Group, Span, TokenStream};
diff --git a/rust/syn/spanned.rs b/rust/syn/spanned.rs
index 17b69e9f5b28..fcc93699f742 100644
--- a/rust/syn/spanned.rs
+++ b/rust/syn/spanned.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
//! A trait that can provide the `Span` of the complete contents of a syntax
//! tree node.
//!
diff --git a/rust/syn/stmt.rs b/rust/syn/stmt.rs
index 8ea0077f63df..029171a98dca 100644
--- a/rust/syn/stmt.rs
+++ b/rust/syn/stmt.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use crate::attr::Attribute;
use crate::expr::Expr;
use crate::item::Item;
diff --git a/rust/syn/thread.rs b/rust/syn/thread.rs
index b33d248afc60..4165a173d9e1 100644
--- a/rust/syn/thread.rs
+++ b/rust/syn/thread.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use std::fmt::{self, Debug};
use std::thread::{self, ThreadId};
diff --git a/rust/syn/token.rs b/rust/syn/token.rs
index 752c188883cb..18345cc5831a 100644
--- a/rust/syn/token.rs
+++ b/rust/syn/token.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
//! Tokens representing Rust punctuation, keywords, and delimiters.
//!
//! The type names in this module can be difficult to keep straight, so we
diff --git a/rust/syn/tt.rs b/rust/syn/tt.rs
index 7d5d6a1ac326..fc7adec3da90 100644
--- a/rust/syn/tt.rs
+++ b/rust/syn/tt.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use proc_macro2::{Delimiter, TokenStream, TokenTree};
use std::hash::{Hash, Hasher};
diff --git a/rust/syn/ty.rs b/rust/syn/ty.rs
index c093f5877b3c..ae660d2d2e74 100644
--- a/rust/syn/ty.rs
+++ b/rust/syn/ty.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use crate::attr::Attribute;
use crate::expr::Expr;
use crate::generics::{BoundLifetimes, TypeParamBound};
diff --git a/rust/syn/verbatim.rs b/rust/syn/verbatim.rs
index 54dc1cfa0d82..97bc08f70afe 100644
--- a/rust/syn/verbatim.rs
+++ b/rust/syn/verbatim.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
use crate::parse::ParseStream;
use proc_macro2::{Delimiter, TokenStream};
use std::cmp::Ordering;
diff --git a/rust/syn/whitespace.rs b/rust/syn/whitespace.rs
index a50b5069a68b..b7319bd7af18 100644
--- a/rust/syn/whitespace.rs
+++ b/rust/syn/whitespace.rs
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
pub(crate) fn skip(mut s: &str) -> &str {
'skip: while !s.is_empty() {
let byte = s.as_bytes()[0];
--
2.51.2
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