[PATCH v2 0/3] uaccess: unify inline vs outline copy_{from,to}_user() selection

[Yury Norov]

The kernel allows arches to select between inline and outline
implementations of the copy_{from,to}_user() by defining individual
INLINE_COPY_FROM_USER and INLINE_COPY_TO_USER, correspondingly.
However, all arches enable or disable them always together.

Without the real use-case for one helper being inlined while the other
outlined, having independent controls is excessive and error prone.

The first patch of the series fixes rust/uaccess coppy_to_user() wrapper
guarded with INLINE_COPY_FROM_USER. The 2nd patch switches codebase to
the unified INLINE_COPY_USER. And the last patch cleans up ifdefery in
the include/linux/uaccess.h

---
v1: https://lore.kernel.org/all/20260325163313.749336-1-ynorov@xxxxxxxxxx/
v2:
 - reword cover letter (Andrew);
 - add v2#1 to fix rust/uaccess explicitly (Alice);

Yury Norov (3):
  rust: uaccess: use INLINE_COPY_TO_USER to guard copy_to_user()
  uaccess: unify inline vs outline copy_{from,to}_user() selection
  uaccess: minimize INLINE_COPY_USER-related ifdefery

 arch/arc/include/asm/uaccess.h        |  3 +--
 arch/arm/include/asm/uaccess.h        |  3 +--
 arch/arm64/include/asm/uaccess.h      |  3 +--
 arch/hexagon/include/asm/uaccess.h    |  3 +--
 arch/loongarch/include/asm/uaccess.h  |  3 +--
 arch/m68k/include/asm/uaccess.h       |  3 +--
 arch/microblaze/include/asm/uaccess.h |  3 +--
 arch/mips/include/asm/uaccess.h       |  3 +--
 arch/nios2/include/asm/uaccess.h      |  3 +--
 arch/openrisc/include/asm/uaccess.h   |  3 +--
 arch/parisc/include/asm/uaccess.h     |  3 +--
 arch/s390/include/asm/uaccess.h       |  3 +--
 arch/sh/include/asm/uaccess.h         |  3 +--
 arch/sparc/include/asm/uaccess_32.h   |  3 +--
 arch/sparc/include/asm/uaccess_64.h   |  3 +--
 arch/um/include/asm/uaccess.h         |  3 +--
 arch/xtensa/include/asm/uaccess.h     |  3 +--
 include/asm-generic/uaccess.h         |  3 +--
 include/linux/uaccess.h               | 25 +++++++++----------------
 lib/usercopy.c                        |  4 +---
 rust/helpers/uaccess.c                |  2 +-
 21 files changed, 29 insertions(+), 56 deletions(-)

-- 
2.51.0