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Date: Fri, 11 Jan 2019 19:03:42 -0800 (PST) From: David Miller <davem@...emloft.net> To: gustavo@...eddedor.com Cc: isdn@...ux-pingi.de, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] mISDN: hfcsusb: Use struct_size() in kzalloc() From: "Gustavo A. R. Silva" <gustavo@...eddedor.com> Date: Tue, 8 Jan 2019 15:27:05 -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; > void *entry[]; > }; > > instance = kzalloc(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 = 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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