linux-kernel - Re: [PATCH v1 3/9] perf util: Reconstruct rblist for supporting per-thread shadow stats

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Date:   Wed, 22 Nov 2017 12:01:32 +0530
From:   Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
To:     Jin Yao <yao.jin@...ux.intel.com>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com,
        Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Subject: Re: [PATCH v1 3/9] perf util: Reconstruct rblist for supporting
 per-thread shadow stats


On 11/20/2017 08:13 PM, Jin Yao wrote:
> @@ -76,6 +97,17 @@ static struct rb_node *saved_value_new(struct rblist *rblist __maybe_unused,
>   	return &nd->rb_node;
>   }
>
> +static void saved_value_delete(struct rblist *rblist __maybe_unused,
> +			       struct rb_node *rb_node)
> +{
> +	struct saved_value *v = container_of(rb_node,
> +					     struct saved_value,
> +					     rb_node);
> +
> +	if (v)
> +		free(v);
> +}

Do we really need if(v) ?

Thanks,
Ravi