[PATCH v10] linux: Add support for getrandom vDSO

[Florian Weimer]

* Adhemerval Zanella:

> diff --git a/NEWS b/NEWS
> index 2fe0396b2d..0d3107ed68 100644
> --- a/NEWS
> +++ b/NEWS
> @@ -42,7 +42,9 @@ Deprecated and removed features, and other changes affecting compatibility:
>  
>  Changes to build and runtime requirements:
>  
> -  [Add changes to build and runtime requirements here]
> +* On recent Linux kernels with vDSO getrandom support, getrandom does not
> +  act as a shall occur cancellation point.  It this case, the getrandom may
> +  not issue any syscall, nor trigger a deferred cancellation event.

Maybe a native speaker could make some suggestions here?  I would at
least add quotation marks around “shall occur”, to make the attributive
use clearer, or add a hyphen.

> diff --git a/sysdeps/unix/sysv/linux/getrandom-internal.h b/sysdeps/unix/sysv/linux/getrandom-internal.h
> new file mode 100644
> index 0000000000..37e6c9bc15
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/getrandom-internal.h

> +static bool
> +vgetrandom_get_state_alloc (void)
> +{

> +  for (size_t i = 0; i < states_per_page; ++i)
> +    {
> +      /* There is no need to handle states that stranddle a page becuase

Typos:  stra[]ddle, bec[au]se

I think the allocation logic is now correct.

Thanks,
Florian