Re: [dpdk-dev] [PATCH v8 02/11] eal/linux: add rte_epoll_wait/ctl support

[Stephen Hemminger <stephen@networkplumber.org>]

On Thu, 21 May 2015 16:55:54 +0800
Cunming Liang <cunming.liang@intel.com> wrote:

> +static int
> +eal_epoll_process_event(struct epoll_event *evs, int n,
> +			struct rte_epoll_event *events)
> +{
> +	int i;
> +	int count = 0;
> +	struct rte_epoll_event *rev;
> +	for (i = 0; i < n; i++) {
> +		rev = (struct rte_epoll_event *)evs[i].data.ptr;
> +		if (!rev || !rte_atomic32_cmpset(&rev->status, RTE_EPOLL_VALID,
> +						 RTE_EPOLL_EXEC))
> +			continue;
> +
> +		events[count].status        = RTE_EPOLL_VALID;
> +		events[count].fd            = rev->fd;
> +		events[count].epfd          = rev->epfd;
> +		events[count].epdata.event  = rev->epdata.event;
> +		events[count].epdata.data   = rev->epdata.data;

This code has several style issues:
 1. Always put blank line after declarations

 2. Use unsigned where ever it makes sense as a matter of habit.
      unsigned int i, count = 0;

 3. Don't add casts where not necessary, it reduces compiler type checking
    and is a bad habit. In this case evs[i].data.ptr is void *
    and therefore no cast is needed.