Re: [PATCH v3] kbuild: rust: split up helpers.c

From: Benno Lossin
Date: Thu Aug 15 2024 - 10:32:57 EST


On 15.08.24 12:30, Andreas Hindborg wrote:
> From: Andreas Hindborg <a.hindborg@xxxxxxxxxxx>
>
> This patch splits up the rust helpers C file. When rebasing patch sets on
> upstream linux, merge conflicts in helpers.c is common and time consuming
> [1]. Thus, split the file so that each kernel component can live in a
> separate file.
>
> This patch lists helper files explicitly and thus conflicts in the file
> list is still likely. However, they should be more simple to resolve than
> the conflicts usually seen in helpers.c.
>
> Link: https://rust-for-linux.zulipchat.com/#narrow/stream/288089-General/topic/Splitting.20up.20helpers.2Ec/near/426694012 [1]
> Signed-off-by: Andreas Hindborg <a.hindborg@xxxxxxxxxxx>

Looks good with `--color-moved`.

Reviewed-by: Benno Lossin <benno.lossin@xxxxxxxxx>

I got one comment suggestion below, but feel free to take it without.

> ---
>
> Changes since v2 [2]:
> - Rebase on 6.11-rc3.
> - Use `cpp` instead of Makefile scripting to concatenate files.
>
> Link:
> https://lore.kernel.org/rust-for-linux/20240507210818.672517-1-ojeda@xxxxxxxxxx/ [2]
> ---
> rust/Makefile | 6 +-
> rust/helpers.c | 239 ------------------------------------
> rust/helpers/README.md | 17 +++
> rust/helpers/blk.c | 16 +++
> rust/helpers/bug.c | 9 ++
> rust/helpers/build_assert.c | 25 ++++
> rust/helpers/build_bug.c | 10 ++
> rust/helpers/err.c | 22 ++++
> rust/helpers/helpers.c | 18 +++
> rust/helpers/kunit.c | 10 ++
> rust/helpers/mutex.c | 10 ++
> rust/helpers/page.c | 24 ++++
> rust/helpers/refcount.c | 22 ++++
> rust/helpers/signal.c | 10 ++
> rust/helpers/slab.c | 10 ++
> rust/helpers/spinlock.c | 27 ++++
> rust/helpers/task.c | 22 ++++
> rust/helpers/uaccess.c | 17 +++
> rust/helpers/wait.c | 10 ++
> rust/helpers/workqueue.c | 16 +++
> 20 files changed, 298 insertions(+), 242 deletions(-)
> delete mode 100644 rust/helpers.c
> create mode 100644 rust/helpers/README.md
> create mode 100644 rust/helpers/blk.c
> create mode 100644 rust/helpers/bug.c
> create mode 100644 rust/helpers/build_assert.c
> create mode 100644 rust/helpers/build_bug.c
> create mode 100644 rust/helpers/err.c
> create mode 100644 rust/helpers/helpers.c
> create mode 100644 rust/helpers/kunit.c
> create mode 100644 rust/helpers/mutex.c
> create mode 100644 rust/helpers/page.c
> create mode 100644 rust/helpers/refcount.c
> create mode 100644 rust/helpers/signal.c
> create mode 100644 rust/helpers/slab.c
> create mode 100644 rust/helpers/spinlock.c
> create mode 100644 rust/helpers/task.c
> create mode 100644 rust/helpers/uaccess.c
> create mode 100644 rust/helpers/wait.c
> create mode 100644 rust/helpers/workqueue.c

[...]

> diff --git a/rust/helpers/helpers.c b/rust/helpers/helpers.c
> new file mode 100644
> index 000000000000..74dd4275c233
> --- /dev/null
> +++ b/rust/helpers/helpers.c
> @@ -0,0 +1,18 @@
> +// SPDX-License-Identifier: GPL-2.0
> +

Should there be a comment here noting that these includes are sorted
alphabetically? Since then (most) conflicts in this file can simply be
solved by concatenating all hunks and doing `:'<,'>!sort | uniq`?

---
Cheers,
Benno

> +#include "blk.c"
> +#include "bug.c"
> +#include "build_assert.c"
> +#include "build_bug.c"
> +#include "err.c"
> +#include "kunit.c"
> +#include "mutex.c"
> +#include "page.c"
> +#include "refcount.c"
> +#include "signal.c"
> +#include "slab.c"
> +#include "spinlock.c"
> +#include "task.c"
> +#include "uaccess.c"
> +#include "wait.c"
> +#include "workqueue.c"