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Revert "ANDROID: mm/khugepaged: add missing vm_write_{begin|end}"

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This reverts commit 365a5b7af5.

Change-Id: Ifb555936b0887bab47590ccd77bdd435da10c179
Signed-off-by: Alexander Winkowski <dereference23@outlook.com>
This commit is contained in:
Alexander Winkowski 2024-01-12 04:58:56 +00:00
commit ee757276ff
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GPG key ID: 72762A66704CDE44
1 changed files with 0 additions and 6 deletions
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6
mm/khugepaged.c
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@ -1345,8 +1345,6 @@ void collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr)
if (!pmd)
goto drop_hpage;
vm_write_begin(vma);
/*
* We need to lock the mapping so that from here on, only GUP-fast and
* hardware page walks can access the parts of the page tables that
@ -1414,7 +1412,6 @@ void collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr)
haddr + HPAGE_PMD_SIZE);
mmu_notifier_invalidate_range_start(&range);
_pmd = pmdp_collapse_flush(vma, haddr, pmd);
vm_write_end(vma);
mm_dec_nr_ptes(mm);
tlb_remove_table_sync_one();
mmu_notifier_invalidate_range_end(&range);
@ -1431,7 +1428,6 @@ drop_hpage:
abort:
pte_unmap_unlock(start_pte, ptl);
vm_write_end(vma);
i_mmap_unlock_write(vma->vm_file->f_mapping);
goto drop_hpage;
}
@ -1512,10 +1508,8 @@ static void retract_page_tables(struct address_space *mapping, pgoff_t pgoff)
NULL, mm, addr,
addr + HPAGE_PMD_SIZE);
mmu_notifier_invalidate_range_start(&range);
vm_write_begin(vma);
/* assume page table is clear */
_pmd = pmdp_collapse_flush(vma, addr, pmd);
vm_write_end(vma);
mm_dec_nr_ptes(mm);
tlb_remove_table_sync_one();
pte_free(mm, pmd_pgtable(_pmd));