diff mbox series

[012/143] mm/hugetlb: use some helper functions to cleanup code

Message ID 20210505013322.tAinkQSCk%akpm@linux-foundation.org (mailing list archive)
State New
Headers show
Series [001/143] mm: introduce and use mapping_empty() | expand

Commit Message

Andrew Morton May 5, 2021, 1:33 a.m. UTC
From: Miaohe Lin <linmiaohe@huawei.com>
Subject: mm/hugetlb: use some helper functions to cleanup code

Patch series "Some cleanups for hugetlb".

This series contains cleanups to remove unnecessary VM_BUG_ON_PAGE, use
helper function and so on.  I also collect some previous patches into this
series in case they are forgotten.


This patch (of 5):

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.

Link: https://lkml.kernel.org/r/20210308112809.26107-1-linmiaohe@huawei.com
Link: https://lkml.kernel.org/r/20210308112809.26107-2-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/hugetlbfs/inode.c |    2 +-
 mm/hugetlb.c         |    6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)
diff mbox series

Patch

--- a/fs/hugetlbfs/inode.c~mm-hugetlb-use-some-helper-functions-to-cleanup-code
+++ a/fs/hugetlbfs/inode.c
@@ -1435,7 +1435,7 @@  static int get_hstate_idx(int page_size_
 
 	if (!h)
 		return -1;
-	return h - hstates;
+	return hstate_index(h);
 }
 
 /*
--- a/mm/hugetlb.c~mm-hugetlb-use-some-helper-functions-to-cleanup-code
+++ a/mm/hugetlb.c
@@ -1273,7 +1273,7 @@  static void free_gigantic_page(struct pa
 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();
 
@@ -3267,10 +3267,10 @@  static int __init hugepages_setup(char *
 
 	/*
 	 * 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;