hugetlb: use LIST_HEAD() to define a list head

Use LIST_HEAD() directly to define a list head to simplify the code.
No functional change intended.

Link: https://lkml.kernel.org/r/20220901120030.63318-4-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index cebaa5d28b52b7ee9a7f29bc47714ab5b62cfe65..fddbda2a2b37351eb90a8eadfff7898ea4cbe574 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -456,14 +456,12 @@ static int allocate_file_region_entries(struct resv_map *resv,
                                        int regions_needed)
        __must_hold(&resv->lock)
 {
-       struct list_head allocated_regions;
+       LIST_HEAD(allocated_regions);
        int to_allocate = 0, i = 0;
        struct file_region *trg = NULL, *rg = NULL;
 
        VM_BUG_ON(regions_needed < 0);
 
-       INIT_LIST_HEAD(&allocated_regions);
-
        /*
         * Check for sufficient descriptors in the cache to accommodate
         * the number of in progress add operations plus regions_needed.
@@ -2336,7 +2334,7 @@ struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma,
 static int gather_surplus_pages(struct hstate *h, long delta)
        __must_hold(&hugetlb_lock)
 {
-       struct list_head surplus_list;
+       LIST_HEAD(surplus_list);
        struct page *page, *tmp;
        int ret;
        long i;
@@ -2351,7 +2349,6 @@ static int gather_surplus_pages(struct hstate *h, long delta)
        }
 
        allocated = 0;
-       INIT_LIST_HEAD(&surplus_list);
 
        ret = -ENOMEM;
 retry: