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>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
atomic_long_inc(&port->counter_group[CM_RECV].
counter[attr_id - CM_ATTR_ID_OFFSET]);
- work = kmalloc(sizeof(*work) + sizeof(struct sa_path_rec) * paths,
- GFP_KERNEL);
+ work = kmalloc(struct_size(work, path, paths), GFP_KERNEL);
if (!work) {
ib_free_recv_mad(mad_recv_wc);
return;