[PATCH v2 0/2] rust: add functions and traits for lossless integer conversions

[Alexandre Courbot <acourbot@nvidia.com>]

This series introduces a copy of the lossless integer conversion
functions/traits of `nova-core` into the `kernel` crate, and makes
`nova-core` use them.

This revision addresses the feedback received on v1 by making
architecture-dependent conversions available via a dedicated `arch`
sub-module to make it more obvious that they are not portable.

This series is based on `rust-next`.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
---
Changes in v2:
- Move architecture-dependent conversions into `arch` sub-module, and
  use dedicated trait names.
- Use `use crate::` instead of `use kernel::` for kernel imports.
- Replace use of `build_assert!` with `const_assert!` (Sashiko).
- `#[inline]` all the functions (Sashiko).
- Remove stray `#[allow(unused)]`.
- Group kernel imports properly (Sashiko).
- Do not reexport the contents of `casts` in `num`.
- Link to v1: https://patch.msgid.link/20260727-as_casts-v1-0-6ea704ff25d8@nvidia.com

Changes in v1:
- Update to latest version in `nova-core`.
- Make `nova-core` use the kernel crate implementation and remove its
  own.
- Link to RFC: https://lore.kernel.org/r/20251104-as_casts-v1-1-0a0e95bd2a9f@nvidia.com

---
Alexandre Courbot (2):
      rust: add functions and traits for lossless integer conversions
      gpu: nova-core: use kernel lossless integer conversion module

 drivers/gpu/nova-core/falcon.rs                    |  12 +-
 drivers/gpu/nova-core/falcon/fsp.rs                |   4 +-
 drivers/gpu/nova-core/fb.rs                        |   2 +-
 drivers/gpu/nova-core/fb/hal/gb100.rs              |  11 +-
 drivers/gpu/nova-core/firmware.rs                  |   8 +-
 drivers/gpu/nova-core/firmware/booter.rs           |  10 +-
 drivers/gpu/nova-core/firmware/fwsec.rs            |   2 +-
 drivers/gpu/nova-core/firmware/fwsec/bootloader.rs |   2 +-
 drivers/gpu/nova-core/firmware/gsp.rs              |   7 +-
 drivers/gpu/nova-core/firmware/riscv.rs            |   6 +-
 drivers/gpu/nova-core/fsp.rs                       |   4 +-
 drivers/gpu/nova-core/gsp.rs                       |   4 +-
 drivers/gpu/nova-core/gsp/cmdq.rs                  |  24 +-
 drivers/gpu/nova-core/gsp/fw.rs                    |  42 +--
 drivers/gpu/nova-core/gsp/sequencer.rs             |   2 +-
 drivers/gpu/nova-core/num.rs                       | 211 ---------------
 drivers/gpu/nova-core/vbios.rs                     |   2 +-
 rust/kernel/num.rs                                 |   2 +
 rust/kernel/num/casts.rs                           | 298 +++++++++++++++++++++
 19 files changed, 373 insertions(+), 280 deletions(-)
---
base-commit: dc01dfb37b34beeefcfe1c3055364d41a4070c7e
change-id: 20251104-as_casts-6a8882ac0192

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