mm/huge_memory: fix comment in zap_huge_pud

The comment about deposited pgtable is borrowed from zap_huge_pmd but
there's no deposited pgtable stuff for huge pud in zap_huge_pud. Remove
it to avoid confusion.

Link: https://lkml.kernel.org/r/20220704132201.14611-10-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zach O'Keefe <zokeefe@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 253ab79..266afca 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1913,12 +1913,7 @@ int zap_huge_pud(struct mmu_gather *tlb, struct vm_area_struct *vma,
        ptl = __pud_trans_huge_lock(pud, vma);
        if (!ptl)
                return 0;
-       /*
-        * For architectures like ppc64 we look at deposited pgtable
-        * when calling pudp_huge_get_and_clear. So do the
-        * pgtable_trans_huge_withdraw after finishing pudp related
-        * operations.
-        */
+
        pudp_huge_get_and_clear_full(tlb->mm, addr, pud, tlb->fullmm);
        tlb_remove_pud_tlb_entry(tlb, pud, addr);
        if (vma_is_special_huge(vma)) {