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From:   Marc Zyngier <maz@kernel.org>
To:     linux-kernel@vger.kernel.org
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Subject: [PATCH 17/39] irqdomain: Use struct_size() helper when allocating irqdomain
Date:   Thu, 20 May 2021 17:37:29 +0100
Message-Id: <20210520163751.27325-18-maz@kernel.org>
In-Reply-To: <20210520163751.27325-1-maz@kernel.org>
References: <20210520163751.27325-1-maz@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

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>
---
 kernel/irq/irqdomain.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index fa94c86e47d4..cdcb1989cd20 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -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;
-- 
2.30.2