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irqdomain: Use struct_size() helper when allocating irqdomain

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Instead of open-coding the size computation of struct irqdomain,
use the struct_size() helper instead.

This is going to be handy as we change the type of the revmap
array.

Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2021-04-05 11:30:51 +01:00
parent 4f86a06e2d
commit 426fa31614
1 changed files with 1 additions and 1 deletions
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2
kernel/irq/irqdomain.c
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@ -150,7 +150,7 @@ struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size,
(!IS_ENABLED(CONFIG_IRQ_DOMAIN_NOMAP) && direct_max)))
return NULL;
domain = kzalloc_node(sizeof(*domain) + (sizeof(unsigned int) * size),
domain = kzalloc_node(struct_size(domain, revmap, size),
GFP_KERNEL, of_node_to_nid(to_of_node(fwnode)));
if (!domain)
return NULL;