iommu: simplify list initialization in iommu_create_device_direct_mappings()

Use LIST_HEAD() to declare and initialize the 'mappings' list head in
iommu_create_device_direct_mappings() instead of separate declaration and
INIT_LIST_HEAD(). This simplifies the code by combining declaration and
initialization into a single idiomatic form, improving readability without
changing functionality.

Signed-off-by: Can Peng <pengcan@kylinos.cn>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 585b13bcc8cfd9c1d06cf271d5506b08712e0b25..4926a43118e6fcb2ed839e61057d27a1e4f21577 100644 (file)
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1180,12 +1180,11 @@ static int iommu_create_device_direct_mappings(struct iommu_domain *domain,
                                               struct device *dev)
 {
        struct iommu_resv_region *entry;
-       struct list_head mappings;
+       LIST_HEAD(mappings);
        unsigned long pg_size;
        int ret = 0;
 
        pg_size = domain->pgsize_bitmap ? 1UL << __ffs(domain->pgsize_bitmap) : 0;
-       INIT_LIST_HEAD(&mappings);
 
        if (WARN_ON_ONCE(iommu_is_dma_domain(domain) && !pg_size))
                return -EINVAL;