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From: Marcel Holtmann <marcel@holtmann.org>
To: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc: Johan Hedberg <johan.hedberg@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH][next] Bluetooth: a2mp: Use struct_size() helper
Date: Mon, 18 Feb 2019 14:02:27 +0100
Message-ID: <F03ABE42-2AB3-4519-9E64-43E4600C6A42@holtmann.org> (raw)
In-Reply-To: <20190208002817.GA15338@embeddedor>

Hi Gustavo,

> 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 = alloc(size, GFP_KERNEL)
> 
> Instead of leaving these open-coded and prone to type mistakes, we can
> now use the new struct_size() helper:
> 
> size = struct_size(instance, entry, count);
> instance = alloc(size, GFP_KERNEL)
> 
> This code was detected with the help of Coccinelle.
> 
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
> ---
> net/bluetooth/a2mp.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel


  parent reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-08  0:28 Gustavo A. R. Silva
2019-02-08  4:00 ` Joe Perches
2019-02-08  4:07   ` Gustavo A. R. Silva
2019-02-18 13:02 ` Marcel Holtmann [this message]
2019-02-18 17:50   ` Gustavo A. R. Silva

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