mm/debug_vm_pgtable: replace WRITE_ONCE() with pxd_clear()

Replace WRITE_ONCE() with generic pxd_clear() to clear out the page table
entries as required.  Besides this does not cause any functional change as
well.

Link: https://lkml.kernel.org/r/20260227061204.2215395-1-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Suggested-by: Ryan Roberts <ryan.roberts@arm.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Ackeed-by: SeongJae Park <sj@kernel.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index 83cf07269f13495391472b10cdf4e87178986aae..23dc3ee0956192507c4e2cd19931f83e271828a3 100644 (file)
--- a/mm/debug_vm_pgtable.c
+++ b/mm/debug_vm_pgtable.c
@@ -445,7 +445,7 @@ static void __init pmd_huge_tests(struct pgtable_debug_args *args)
         * X86 defined pmd_set_huge() verifies that the given
         * PMD is not a populated non-leaf entry.
         */
-       WRITE_ONCE(*args->pmdp, __pmd(0));
+       pmd_clear(args->pmdp);
        WARN_ON(!pmd_set_huge(args->pmdp, __pfn_to_phys(args->fixed_pmd_pfn), args->page_prot));
        WARN_ON(!pmd_clear_huge(args->pmdp));
        pmd = pmdp_get(args->pmdp);
@@ -465,7 +465,7 @@ static void __init pud_huge_tests(struct pgtable_debug_args *args)
         * X86 defined pud_set_huge() verifies that the given
         * PUD is not a populated non-leaf entry.
         */
-       WRITE_ONCE(*args->pudp, __pud(0));
+       pud_clear(args->pudp);
        WARN_ON(!pud_set_huge(args->pudp, __pfn_to_phys(args->fixed_pud_pfn), args->page_prot));
        WARN_ON(!pud_clear_huge(args->pudp));
        pud = pudp_get(args->pudp);