From: Mohamad Alsadhan <mo@sdhn.cc>
Date: Tue, 28 Apr 2026 13:10:54 +0000 (+0100)
Subject: rust: pin-init: internal: add missing where clause to projection types
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=5edf8ac281ad04433c606917a1a9e88bf8fa10d8;p=thirdparty%2Fkernel%2Flinux.git

rust: pin-init: internal: add missing where clause to projection types

`#[pin_data]` failed to propagate the struct's `where` clause to the
generated projection struct. As a result, bounds written in a `where`
clause could be dropped during expansion, causing type errors when
fields depended on those bounds.

Fix this by adding the missing `where` clause to the generated
projection struct.

Reported-by: Andreas Hindborg <a.hindborg@kernel.org>
Closes: https://rust-for-linux.zulipchat.com/#narrow/channel/561532-pin-init/topic/generic.20bounds.20and.20.60.23.5Bpin_data.5D.60/with/578381591
Signed-off-by: Mohamad Alsadhan <mo@sdhn.cc>
Reviewed-by: Gary Guo <gary@garyguo.net>
[ Reworded commit message - Gary ]
Link: https://patch.msgid.link/20260428-pin-init-sync-v1-5-07f9bd3859fb@garyguo.net
Signed-off-by: Gary Guo <gary@garyguo.net>
---

diff --git a/rust/pin-init/internal/src/pin_data.rs b/rust/pin-init/internal/src/pin_data.rs
index 7d871236b49c7..6b1b8f26379ac 100644
--- a/rust/pin-init/internal/src/pin_data.rs
+++ b/rust/pin-init/internal/src/pin_data.rs
@@ -304,7 +304,9 @@ fn generate_projections(
         #[doc = #docs]
         #[allow(dead_code)]
         #[doc(hidden)]
-        #vis struct #projection #generics_with_pin_lt {
+        #vis struct #projection #generics_with_pin_lt
+            #whr
+        {
             #(#fields_decl)*
             ___pin_phantom_data: ::core::marker::PhantomData<&'__pin mut ()>,
         }