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Subject[PATCH] mm/hugetlb: use some helper functions to cleanup code
Date
We could use pages_per_huge_page to get the number of pages per hugepage,
use get_hstate_idx to calculate hstate index, and use hstate_is_gigantic
to check if a hstate is gigantic to make code more succinct.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
fs/hugetlbfs/inode.c | 2 +-
mm/hugetlb.c | 6 +++---
2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 701c82c36138..c262566f7c5d 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -1435,7 +1435,7 @@ static int get_hstate_idx(int page_size_log)

if (!h)
return -1;
- return h - hstates;
+ return hstate_index(h);
}

/*
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 8f6c98096476..da347047ea10 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1271,7 +1271,7 @@ static void free_gigantic_page(struct page *page, unsigned int order)
static struct page *alloc_gigantic_page(struct hstate *h, gfp_t gfp_mask,
int nid, nodemask_t *nodemask)
{
- unsigned long nr_pages = 1UL << huge_page_order(h);
+ unsigned long nr_pages = pages_per_huge_page(h);
if (nid == NUMA_NO_NODE)
nid = numa_mem_id();

@@ -3262,10 +3262,10 @@ static int __init hugepages_setup(char *s)

/*
* Global state is always initialized later in hugetlb_init.
- * But we need to allocate >= MAX_ORDER hstates here early to still
+ * But we need to allocate gigantic hstates here early to still
* use the bootmem allocator.
*/
- if (hugetlb_max_hstate && parsed_hstate->order >= MAX_ORDER)
+ if (hugetlb_max_hstate && hstate_is_gigantic(parsed_hstate))
hugetlb_hstate_alloc_pages(parsed_hstate);

last_mhp = mhp;
--
2.19.1
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