From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: "Gustavo A. R. Silva" <gustavo@embeddedor.com>,
Jeremy Kerr <jk@ozlabs.org>, Arnd Bergmann <arnd@arndb.de>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
"Gustavo A. R. Silva" <gustavo@embeddedor.com>
Subject: Re: powerpc/spufs: use struct_size() in kmalloc()
Date: Thu, 24 Jan 2019 14:40:19 +1100 (AEDT) [thread overview]
Message-ID: <43lSbR6CTJz9s55@ozlabs.org> (raw)
In-Reply-To: <20190108183720.GA14238@embeddedor>
On Tue, 2019-01-08 at 18:37:20 UTC, "Gustavo A. R. Silva" 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;
> void *entry[];
> };
>
> instance = kmalloc(sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL);
>
> Instead of leaving these open-coded and prone to type mistakes, we can
> now use the new struct_size() helper:
>
> instance = kmalloc(struct_size(instance, entry, count), GFP_KERNEL);
>
> This code was detected with the help of Coccinelle.
>
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/00def7130af8b3fad1bdef98429c94a6
cheers
prev parent reply other threads:[~2019-01-24 3:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-08 18:37 [PATCH] powerpc/spufs: use struct_size() in kmalloc() Gustavo A. R. Silva
2019-01-24 3:40 ` Michael Ellerman [this message]
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