Re: [RFC][PATCH 04/12] types: Introduce [us]128

Pavel Machek
2022-12-29T08:30:57Z

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Hi!

> Introduce [us]128 (when available). Unlike [us]64, ensure they are
> always naturally aligned.
>
> This also enables 128bit wide atomics (which require natural
> alignment) such as cmpxchg128().
>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> ---
> include/linux/types.h | 5 +++++
> include/uapi/linux/types.h | 4 ++++
> 2 files changed, 9 insertions(+)
>
> --- a/include/linux/types.h
> +++ b/include/linux/types.h
> @@ -10,6 +10,11 @@
> #define DECLARE_BITMAP(name,bits) \
> unsigned long name[BITS_TO_LONGS(bits)]
>
> +#ifdef __SIZEOF_INT128__
> +typedef __s128 s128;
> +typedef __u128 u128;
> +#endif

Should this come as a note here?

> Introduce [us]128 (when available). Unlike [us]64, ensure they are
> always naturally aligned.

BR,
Pavel
--
People of Russia, stop Putin before his war on Ukraine escalates.

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