From mboxrd@z Thu Jan  1 00:00:00 1970
From: Radim =?utf-8?B?S3LEjW3DocWZ?= <rkrcmar@redhat.com>
Subject: Re: [PATCH] kvm: Use struct_size() in kmalloc()
Date: Fri, 11 Jan 2019 14:53:43 +0100
Message-ID: <20190111135342.GH14852@flask>
References: <20190104162910.GA25118@embeddedor>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: Paolo Bonzini <pbonzini@redhat.com>, kvm@vger.kernel.org,
        linux-kernel@vger.kernel.org
To: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Return-path: <linux-kernel-owner@vger.kernel.org>
Content-Disposition: inline
In-Reply-To: <20190104162910.GA25118@embeddedor>
Sender: linux-kernel-owner@vger.kernel.org
List-Id: kvm.vger.kernel.org

2019-01-04 10:29-0600, Gustavo A. R. Silva:
> 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>
> ---

Queued, thanks.