[PATCH RFC 3/3] nptl: Include CLOCK_MONOTONIC in mutex tests

[Joseph Myers]

On Mon, 21 Jun 2021, Kurt Kanzenbach via Libc-alpha wrote:

> diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h
> index 1680b10ca1b6..eb5c4d5a04bd 100644
> --- a/sysdeps/unix/sysv/linux/kernel-features.h
> +++ b/sysdeps/unix/sysv/linux/kernel-features.h
> @@ -218,4 +218,12 @@
>  # define __ASSUME_FACCESSAT2 0
>  #endif
>  
> +/* The FUTEX_LOCK_PI2 operation was introduced across all architectures in Linux
> +   5.14.  */
> +#if __LINUX_KERNEL_VERSION >= 0x051400

0x051400 is 5.20.0, not 5.14.0.

I'd expect this change to appear in an earlier patch, with 
__ASSUME_FUTEX_LOCK_PI2 conditionals being used to disable fallback 
support for kernels found at runtime not to support the new feature.

-- 
Joseph S. Myers
joseph@codesourcery.com