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mm/debug_vm_pgtable/locks: take correct page table lock 

Make sure we call pte accessors with correct lock held.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lkml.kernel.org/r/20200902114222.181353-10-aneesh.kumar@linux.ibm.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Aneesh Kumar K.V 2020-10-15 20:04:53 -07:00 committed by Linus Torvalds
parent e8edf0adb9
commit 6f302e270c
1 changed files with 23 additions and 14 deletions
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37
mm/debug_vm_pgtable.c
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@ -1033,30 +1033,39 @@ static int __init debug_vm_pgtable(void)
hugetlb_basic_tests(pte_aligned, prot); hugetlb_basic_tests(pte_aligned, prot);
pte_clear_tests(mm, ptep, vaddr); /*
pmd_clear_tests(mm, pmdp); * Page table modifying tests. They need to hold
pud_clear_tests(mm, pudp); * proper page table lock.
p4d_clear_tests(mm, p4dp); */
pgd_clear_tests(mm, pgdp);
ptl = pte_lockptr(mm, pmdp); ptl = pte_lockptr(mm, pmdp);
spin_lock(ptl); spin_lock(ptl);
pte_clear_tests(mm, ptep, vaddr);
pte_advanced_tests(mm, vma, ptep, pte_aligned, vaddr, prot); pte_advanced_tests(mm, vma, ptep, pte_aligned, vaddr, prot);
pmd_advanced_tests(mm, vma, pmdp, pmd_aligned, vaddr, prot);
pud_advanced_tests(mm, vma, pudp, pud_aligned, vaddr, prot);
hugetlb_advanced_tests(mm, vma, ptep, pte_aligned, vaddr, prot);
pmd_huge_tests(pmdp, pmd_aligned, prot);
pud_huge_tests(pudp, pud_aligned, prot);
pte_unmap_unlock(ptep, ptl); pte_unmap_unlock(ptep, ptl);
ptl = pmd_lock(mm, pmdp);
pmd_clear_tests(mm, pmdp);
pmd_advanced_tests(mm, vma, pmdp, pmd_aligned, vaddr, prot);
pmd_huge_tests(pmdp, pmd_aligned, prot);
pmd_populate_tests(mm, pmdp, saved_ptep); pmd_populate_tests(mm, pmdp, saved_ptep);
spin_unlock(ptl);
ptl = pud_lock(mm, pudp);
pud_clear_tests(mm, pudp);
pud_advanced_tests(mm, vma, pudp, pud_aligned, vaddr, prot);
pud_huge_tests(pudp, pud_aligned, prot);
pud_populate_tests(mm, pudp, saved_pmdp); pud_populate_tests(mm, pudp, saved_pmdp);
spin_unlock(ptl);
hugetlb_advanced_tests(mm, vma, ptep, pte_aligned, vaddr, prot);
spin_lock(&mm->page_table_lock);
p4d_clear_tests(mm, p4dp);
pgd_clear_tests(mm, pgdp);
p4d_populate_tests(mm, p4dp, saved_pudp); p4d_populate_tests(mm, p4dp, saved_pudp);
pgd_populate_tests(mm, pgdp, saved_p4dp); pgd_populate_tests(mm, pgdp, saved_p4dp);
spin_unlock(&mm->page_table_lock);
p4d_free(mm, saved_p4dp); p4d_free(mm, saved_p4dp);
pud_free(mm, saved_pudp); pud_free(mm, saved_pudp);