Re: [PATCH v3 2/2] pid: only take pidmap_lock once on alloc

[Matthew Wilcox]

On Sat, Dec 06, 2025 at 02:19:55PM +0100, Mateusz Guzik wrote:
> -	if (!pid)
> +	if (unlikely(!pid))

Does this change anything?  I was under the impression that gcc already
treats !p as unlikely.