Re: [PATCH 0/4] Get rid of all NEON intrinsics stdint.h type hacks

[Eric Biggers <ebiggers@kernel.org>]

On Thu, Oct 29, 2026 at 02:50:20PM +0100, Ard Biesheuvel wrote:
> From: Ard Biesheuvel <ardb@kernel.org>
> 
> Recent Clang has become more finicky when it comes to overriding the
> type macros that the freestanding stdint.h consumes when defining the
> uintXX_t types, and so it is time to finally get rid of this entirely.
> 
> So instead of making stdint.h (which comes from the compiler when
> -ffreestanding is set on the command line) agree with the kernel's
> linux/types.h header, avoid the latter entirely in the compilation units
> that actually use the NEON intrinsics (which are always leaf functions
> that are not tightly coupled to kernel APIs).
> 
> Note that the disagreements are about long vs. long long on arm64, and
> long vs. int on 32-bit ARM, so never about types that actually have
> conflicting representations.
> 
> Cc: Christoph Hellwig <hch@lst.de>
> Cc: Eric Biggers <ebiggers@kernel.org>
> Cc: Nathan Chancellor <nathan@kernel.org>
> 
> Ard Biesheuvel (4):
>   lib/crc: Don't include <linux/types.h> in NEON intrinsics code
>   xor: arm/arm64: Move NEON xor_gen() dispatch into the glue code
>   arm64: Drop stdint.h type overrides from asm/neon-intrinsics.h
>   ARM: Drop stdint.h type overrides from asm/neon-intrinsics.h

Reviewed-by: Eric Biggers <ebiggers@kernel.org>

- Eric