linux-kernel - [PATCH v3 0/3] firmware_loader: make RUST_FW_LOADER_ABSTRACTIONS select FW

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Message-Id: <20251106-b4-select-rust-fw-v3-0-771172257755@nvidia.com>
Date: Thu, 06 Nov 2025 11:40:53 +0900
From: Alexandre Courbot <acourbot@...dia.com>
To: Luis Chamberlain <mcgrof@...nel.org>, 
 Russ Weight <russ.weight@...ux.dev>, Danilo Krummrich <dakr@...nel.org>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>, 
 Russell King <linux@...linux.org.uk>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
 Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
 Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
 Benno Lossin <lossin@...nel.org>, Andreas Hindborg <a.hindborg@...nel.org>, 
 Trevor Gross <tmgross@...ch.edu>, 
 FUJITA Tomonori <fujita.tomonori@...il.com>
Cc: linux-kernel@...r.kernel.org, nouveau@...ts.freedesktop.org, 
 dri-devel@...ts.freedesktop.org, netdev@...r.kernel.org, 
 rust-for-linux@...r.kernel.org, Alexandre Courbot <acourbot@...dia.com>
Subject: [PATCH v3 0/3] firmware_loader: make RUST_FW_LOADER_ABSTRACTIONS
 select FW_LOADER

I have noticed that build fails when doing the following:

- Start with the x86 defconfig,
- Using nconfig, enable `RUST` and `DRM_NOVA`,
- Start building.

The problem is that `RUST_FW_LOADER_ABSTRACTIONS` remains unselected,
despite it being a dependency of `NOVA_CORE`. This seems to happen
because `DRM_NOVA` selects `NOVA_CORE`.

Fix this by making `RUST_FW_LOADER_ABSTRACTIONS` select `FW_LOADER`, and
by transition make all users of `RUST_FW_LOADER_ABSTRACTIONS` (so far,
nova-core and net/phy) select it as well.

`FW_LOADER` is more often selected than depended on, so this seems to
make sense generally speaking.

Signed-off-by: Alexandre Courbot <acourbot@...dia.com>
---
Changes in v3:
- Remove `=y` in select statement of RUST_FW_LOADER_ABSTRACTIONS.
- Link to v2: https://lore.kernel.org/r/20251105-b4-select-rust-fw-v2-0-156d9014ed3b@nvidia.com

Changes in v2:
- Split into 3 patches.
- Link to v1: https://lore.kernel.org/r/20251104-b4-select-rust-fw-v1-1-afea175dba22@nvidia.com

---
Alexandre Courbot (3):
      firmware_loader: make RUST_FW_LOADER_ABSTRACTIONS select FW_LOADER
      gpu: nova-core: select RUST_FW_LOADER_ABSTRACTIONS
      net: phy: select RUST_FW_LOADER_ABSTRACTIONS

 drivers/base/firmware_loader/Kconfig | 2 +-
 drivers/gpu/nova-core/Kconfig        | 2 +-
 drivers/net/phy/Kconfig              | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)
---
base-commit: ade19c5060dfa39b84a9475a4a6b05e2a8a2b3ac
change-id: 20251104-b4-select-rust-fw-aeb1e46bcee9

Best regards,
-- 
Alexandre Courbot <acourbot@...dia.com>