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Date:   Wed, 16 Jan 2019 21:11:47 -0800 (PST)
From:   David Miller <>
Subject: Re: [PATCH net-next] openvswitch: meter: Use struct_size() in

From: "Gustavo A. R. Silva" <>
Date: Tue, 15 Jan 2019 15:19:17 -0600

> One of the more common cases of allocation size calculations is finding the
> size of a structure that has a zero-sized array at the end, along with memory
> for some number of elements for that array. For example:
> struct foo {
>     int stuff;
>     struct boo entry[];
> };
> instance = kzalloc(sizeof(struct foo) + count * sizeof(struct boo), GFP_KERNEL);
> Instead of leaving these open-coded and prone to type mistakes, we can now
> use the new struct_size() helper:
> instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL);
> This code was detected with the help of Coccinelle.
> Signed-off-by: Gustavo A. R. Silva <>


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