Re: [PATCH] binder: rm -f binder.c

[Greg Kroah-Hartman]

On Sat, Sep 12, 2026 at 09:41:10PM +0000, Carlos Llamas wrote:
> The day has finally come. We are dropping the legacy C implementation
> of the Binder IPC driver in favor of its Rust version.
> 
> For 15+ years, the C driver has grown increasingly complex, making it
> incredibly painful to maintain and land new features without tripping
> over vulnerabilities. The Rust implementation alleviates most of
> these issues, so it's time for a change.
> 
> Alice Ryhl has worked hard on the Rust binder for the past couple of
> years, not only achieving full feature parity but also proving that it
> can match and often beat the performance of the C counterpart. Having
> run successfully on Android devices for some time now, we can no longer
> call this an "experiment".
> 
> It's time to move on, yank the C code, and focus all new features and
> optimizations on the Rust driver.
> 
> Long live the new Rust Binder king!
> 
> Cc: rust-for-linux@xxxxxxxxxxxxxxx
> Acked-by: Alice Ryhl <aliceryhl@xxxxxxxxxx>
> Signed-off-by: Carlos Llamas <cmllamas@xxxxxxxxxx>
> ---
>  drivers/android/Kconfig                       |   39 +-
>  drivers/android/Makefile                      |    5 +-
>  drivers/android/binder.c                      | 7186 -----------------
>  drivers/android/binder/Makefile               |    4 +-
>  drivers/android/binder/rust_binder_main.rs    |    2 +-
>  drivers/android/binder/rust_binderfs.c        |    2 +-
>  drivers/android/binder_alloc.c                | 1409 ----
>  drivers/android/binder_alloc.h                |  189 -
>  drivers/android/binder_internal.h             |  597 --
>  drivers/android/binder_netlink.c              |   32 -
>  drivers/android/binder_netlink.h              |   21 -
>  drivers/android/binder_trace.h                |  448 -
>  drivers/android/binderfs.c                    |  786 --
>  drivers/android/dbitmap.h                     |  169 -
>  drivers/android/tests/.kunitconfig            |    7 -
>  drivers/android/tests/Makefile                |    6 -
>  drivers/android/tests/binder_alloc_kunit.c    |  572 --
>  rust/bindings/bindings_helper.h               |    2 +-
>  .../filesystems/binderfs/binderfs_test.c      |    2 +-
>  .../selftests/filesystems/binderfs/config     |    1 -
>  20 files changed, 9 insertions(+), 11470 deletions(-)

Yeah!!!

Great job everyone on this, I'll queue this up this week when I catch up
on pending binder fixes/patches...

thanks,

greg k-h