From: Alice Ryhl <aliceryhl@google.com>
Date: Tue, 10 Jun 2025 10:31:56 +0000 (+0000)
Subject: rust: vec: impl Default for Vec with any allocator
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=47d8101924b58e03bfd065c972172e6b69331397;p=thirdparty%2Fkernel%2Flinux.git

rust: vec: impl Default for Vec with any allocator

The implementation of Default is restricted to only work with kmalloc
vectors for no good reason. This means I have to use

	mem::replace(&mut my_vec, KVVec::new())

in Rust Binder instead of `mem::take(&mut my_vec)`. Thus, expand the
impl of Default to work with any allocator including kvmalloc.

Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Benno Lossin <lossin@kernel.org>
Link: https://lore.kernel.org/r/20250610-vec-default-v1-1-7bb2c97d75a0@google.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
---

diff --git a/rust/kernel/alloc/kvec.rs b/rust/kernel/alloc/kvec.rs
index 1a0dd852a468c..606616fc0e592 100644
--- a/rust/kernel/alloc/kvec.rs
+++ b/rust/kernel/alloc/kvec.rs
@@ -851,7 +851,7 @@ where
     }
 }
 
-impl<T> Default for KVec<T> {
+impl<T, A: Allocator> Default for Vec<T, A> {
     #[inline]
     fn default() -> Self {
         Self::new()