hugetlbfs: make hugepage size conversion more readable

The calculation 1U << (h->order + PAGE_SHIFT - 10) is actually equal to
(PAGE_SHIFT << (h->order)) >> 10.  So we can make it more readable by
replace it with huge_page_size(h) >> 10.

Link: https://lkml.kernel.org/r/20210122083141.24548-1-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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 7982adc..46fad3d 100644 (file)
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -1520,8 +1520,8 @@ static struct vfsmount *__init mount_one_hugetlbfs(struct hstate *h)
                put_fs_context(fc);
        }
        if (IS_ERR(mnt))
-               pr_err("Cannot mount internal hugetlbfs for page size %uK",
-                      1U << (h->order + PAGE_SHIFT - 10));
+               pr_err("Cannot mount internal hugetlbfs for page size %luK",
+                      huge_page_size(h) >> 10);
        return mnt;
 }