s390/hugetlb: switch to generic version of follow_huge_pud()
authorGerald Schaefer <gerald.schaefer@linux.ibm.com>
Mon, 12 Sep 2022 03:26:01 +0000 (20:26 -0700)
committerAndrew Morton <akpm@linux-foundation.org>
Mon, 12 Sep 2022 03:26:01 +0000 (20:26 -0700)
commit1a6baaa0db733c0dca2e170ca1df2b09834f47ce
treebf954034cfafcf8ed9b678b83dec73510d8870d2
parent1813e51eece0ad6f4aacaeb738e7cced46feb470
s390/hugetlb: switch to generic version of follow_huge_pud()

When pud-sized hugepages were introduced for s390, the generic version of
follow_huge_pud() was using pte_page() instead of pud_page().  This would
be wrong for s390, see also commit 97534127012f ("mm/hugetlb: use
pmd_page() in follow_huge_pmd()").  Therefore, and probably because not
all archs were supporting pud_page() at that time, a private version of
follow_huge_pud() was added for s390, correctly using pud_page().

Since commit 3a194f3f8ad01 ("mm/hugetlb: make pud_huge() and
follow_huge_pud() aware of non-present pud entry"), the generic version of
follow_huge_pud() is now also using pud_page(), and in general behaves
similar to follow_huge_pmd().

Therefore we can now switch to the generic version and get rid of the
s390-specific follow_huge_pud().

Link: https://lkml.kernel.org/r/20220818135717.609eef8a@thinkpad
Signed-off-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Haiyue Wang <haiyue.wang@intel.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
arch/s390/mm/hugetlbpage.c