From: Kalle Valo <kvalo@codeaurora.org>
To: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc: Arend van Spriel <arend.vanspriel@broadcom.com>,
Franky Lin <franky.lin@broadcom.com>,
Hante Meuleman <hante.meuleman@broadcom.com>,
Chi-Hsien Lin <chi-hsien.lin@cypress.com>,
Wright Feng <wright.feng@cypress.com>,
"David S. Miller" <davem@davemloft.net>,
linux-wireless@vger.kernel.org,
brcm80211-dev-list.pdl@broadcom.com,
brcm80211-dev-list@cypress.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
"Gustavo A. R. Silva" <gustavo@embeddedor.com>
Subject: Re: [PATCH][next] brcmfmac: Use struct_size() in kzalloc()
Date: Sat, 13 Apr 2019 11:03:25 +0000 (UTC) [thread overview]
Message-ID: <20190413110325.156F461786@smtp.codeaurora.org> (raw)
In-Reply-To: <20190403164611.GA29107@embeddedor>
"Gustavo A. R. Silva" <gustavo@embeddedor.com> wrote:
> 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[];
> };
>
> size = sizeof(struct foo) + count * sizeof(struct boo);
> instance = kzalloc(size, 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)
>
> Notice that, in this case, variable reqsz is not necessary,
> hence it is removed.
>
> This code was detected with the help of Coccinelle.
>
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Patch applied to wireless-drivers-next.git, thanks.
0cf83903aad0 brcmfmac: Use struct_size() in kzalloc()
--
https://patchwork.kernel.org/patch/10884189/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
prev parent reply other threads:[~2019-04-13 11:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-03 16:46 [PATCH][next] brcmfmac: Use struct_size() in kzalloc() Gustavo A. R. Silva
2019-04-13 11:03 ` Kalle Valo [this message]
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