swiotlb: simplify array allocation

Prefer kcalloc() to kzalloc(array_size()) for allocating an array.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index f3ff0af..908eac2 100644 (file)
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -818,8 +818,7 @@ static int rmem_swiotlb_device_init(struct reserved_mem *rmem,
                if (!mem)
                        return -ENOMEM;
 
-               mem->slots = kzalloc(array_size(sizeof(*mem->slots), nslabs),
-                                    GFP_KERNEL);
+               mem->slots = kcalloc(nslabs, sizeof(*mem->slots), GFP_KERNEL);
                if (!mem->slots) {
                        kfree(mem);
                        return -ENOMEM;