[PATCH v3 0/6] Add FIELD_MODIFY() helper

[Luo Jie]

Add the helper FIELD_MODIFY() to the FIELD_XXX family of bitfield
macros. It is functionally similar as xxx_replace_bits(), but adds
the compile time checking to catch incorrect parameter type errors.

This series also converts the four instances of opencoded FIELD_MODIFY()
that are found in the core kernel files, to instead use the new
FIELD_MODIFY() macro. This is achieved with Coccinelle, by adding
the script field_modify.cocci.

The changes are validated on IPQ9574 SoC which uses ARM64 architecture.

Signed-off-by: Luo Jie <quic_luoj at quicinc.com>
---
Changes in v3:
- Correct the order of header files included.
- Add the Coccinelle script field_modify.cocci..
- Convert the opencoded FIELD_MODIFY() variants inside arm64 directory,
  identified by field_modify.cocci.
- Link to v2: https://lore.kernel.org/all/20250410131048.2054791-1-quic_luoj@quicinc.com/

Changes in v2:
- Update the documented example for FIELD_MODIFY().
- Improve the commit message to describe the need for the change.
- Link to v1: https://lore.kernel.org/all/20250318071526.1836194-1-quic_luoj@quicinc.com/

---
Luo Jie (6):
      bitfield: Add FIELD_MODIFY() helper
      coccinelle: misc: Add field_modify script
      arm64: tlb: Convert the opencoded field modify
      arm64: nvhe: Convert the opencoded field modify
      arm64: kvm: Convert the opencoded field modify
      arm64: mm: Convert the opencoded field modify

 arch/arm64/include/asm/tlbflush.h          |  3 +--
 arch/arm64/kvm/hyp/include/nvhe/memory.h   |  3 +--
 arch/arm64/kvm/vgic/vgic-mmio-v3.c         |  6 ++----
 arch/arm64/mm/context.c                    |  3 +--
 include/linux/bitfield.h                   | 21 +++++++++++++++++++--
 scripts/coccinelle/misc/field_modify.cocci | 24 ++++++++++++++++++++++++
 6 files changed, 48 insertions(+), 12 deletions(-)
---
base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
change-id: 20250411-field_modify-83b58db99025

Best regards,
-- 
Luo Jie <quic_luoj at quicinc.com>