Re: [patch V2 05/12] rseq: Add prctl() to enable time slice extensions

[Sebastian Andrzej Siewior]

On 2025-10-22 14:57:34 [+0200], Thomas Gleixner wrote:
> --- a/include/linux/rseq.h
> +++ b/include/linux/rseq.h
> @@ -164,4 +164,13 @@ void rseq_syscall(struct pt_regs *regs);
>  static inline void rseq_syscall(struct pt_regs *regs) { }
>  #endif /* !CONFIG_DEBUG_RSEQ */
>  
> +#ifdef CONFIG_RSEQ_SLICE_EXTENSION
> +int rseq_slice_extension_prctl(unsigned long arg2, unsigned long arg3);
> +#else /* CONFIG_RSEQ_SLICE_EXTENSION */
> +static inline int rseq_slice_extension_prctl(unsigned long arg2, unsigned long arg3)
> +{
> +	return -EINVAL;

This should be -ENOTSUPP as in the !rseq_slice_extension_enabled() case.
After all it is the same condition.

> +}

Sebastian