Re: [RFC PATCH 3/3] treewide: pipe: Convert all references to pipe->{head,tail,max_usage,ring_size} to unsigned short

[Oleg Nesterov <oleg@redhat.com>]

On 03/06, K Prateek Nayak wrote:
>
> @@ -272,9 +272,9 @@ pipe_read(struct kiocb *iocb, struct iov_iter *to)
>  	 */
>  	for (;;) {
>  		/* Read ->head with a barrier vs post_one_notification() */
> -		unsigned int head = smp_load_acquire(&pipe->head);
> -		unsigned int tail = pipe->tail;
> -		unsigned int mask = pipe->ring_size - 1;
> +		unsigned short head = smp_load_acquire(&pipe->head);
> +		unsigned short tail = pipe->tail;
> +		unsigned short mask = pipe->ring_size - 1;

I dunno... but if we do this, perhaps we should
s/unsigned int/pipe_index_t instead?

At least this would be more grep friendly.

Oleg.