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H A D | percpu.c | diff 14d3761245551bdfc516abd8214a9f76bfd51435 Thu Aug 29 21:06:05 CEST 2019 Gustavo A. R. Silva <gustavo@embeddedor.com> percpu: Use struct_size() helper
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 pcpu_alloc_info { ... struct pcpu_group_info groups[]; };
Make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes.
So, replace the following form:
sizeof(*ai) + nr_groups * sizeof(ai->groups[0])
with:
struct_size(ai, groups, nr_groups)
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Dennis Zhou <dennis@kernel.org>
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