Re: [PATCH 3/4] perf cgroup: Add cgroup ID as a key of RB tree

[Peter Zijlstra]

On Mon, Apr 29, 2019 at 07:44:04AM -0700, kan.li...@linux.intel.com wrote:
> +static struct perf_event *
> +perf_event_groups_first_cgroup(struct perf_event_groups *groups,
> +                            int cpu, u64 cgrp_id)
> +{
> +     struct perf_event *node_event = NULL, *match = NULL;
> +     struct rb_node *node = groups->tree.rb_node;
> +
> +     while (node) {
> +             node_event = container_of(node, struct perf_event, group_node);
> +
> +             if (cpu < node_event->cpu) {
> +                     node = node->rb_left;
> +             } else if (cpu > node_event->cpu) {
> +                     node = node->rb_right;
> +             } else {
> +                     if (cgrp_id_low(cgrp_id) < 
> cgrp_id_low(node_event->cgrp_id))
> +                             node = node->rb_left;
> +                     else if (cgrp_id_low(cgrp_id) > 
> cgrp_id_low(node_event->cgrp_id))
> +                             node = node->rb_right;
> +                     else {
> +                             match = node_event;
> +                             node = node->rb_left;
> +                             }
> +                     }
> +             }
> +             return match;
> +}

That's whitespace challenged.