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Date: Fri, 01 Feb 2019 15:13:12 -0800 (PST) From: David Miller <davem@...emloft.net> To: gustavo@...eddedor.com Cc: jakub.kicinski@...ronome.com, oss-drivers@...ronome.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH net-next] nfp: use struct_size() in kzalloc() From: "Gustavo A. R. Silva" <gustavo@...eddedor.com> Date: Wed, 30 Jan 2019 18:38:59 -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 <gustavo@...eddedor.com> Applied.
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