Commit d1619a43 authored by Danilo Krummrich's avatar Danilo Krummrich
Browse files

rust: dma: generalize BinaryWriter impl for Coherent<T> 



Generalize the BinaryWriter implementation from Coherent<[u8]> to
Coherent<T> where T: KnownSize + AsBytes + ?Sized. The implementation
only uses size() and write_dma(), neither of which depends on the
inner type being a byte slice.

This allows any Coherent allocation with an AsBytes inner type to be
exposed as a debugfs binary file.

Acked-by: default avatarGary Guo <gary@garyguo.net>
Reviewed-by: default avatarAlexandre Courbot <acourbot@nvidia.com>
Link: https://patch.msgid.link/20260325003921.3420-2-dakr@kernel.org


Signed-off-by: default avatarDanilo Krummrich <dakr@kernel.org>
parent 25fe63db

rust/kernel/dma.rs

+1 −1
Original line number Diff line number Diff line
@@ -885,7 +885,7 @@ unsafe impl<T: KnownSize + Send + ?Sized> Send for Coherent<T> {} 
// The safe methods only return metadata or raw pointers whose use requires `unsafe`.

unsafe impl<T: KnownSize + ?Sized + AsBytes + FromBytes + Sync> Sync for Coherent<T> {}



impl debugfs::BinaryWriter for Coherent<[u8]> {

impl<T: KnownSize + AsBytes + ?Sized> debugfs::BinaryWriter for Coherent<T> {

    fn write_to_slice(

        &self,

        writer: &mut UserSliceWriter,