+ mm-debug_vm_pgtable-test-pmd_leaf-behavior-with-pmd_mkinvalid.patch added to mm-unstable branch

+ mm-debug_vm_pgtable-test-pmd_leaf-behavior-with-pmd_mkinvalid.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/debug_vm_pgtable: test pmd_leaf() behavior with pmd_mkinvalid()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-debug_vm_pgtable-test-pmd_leaf-behavior-with-pmd_mkinvalid.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-debug_vm_pgtable-test-pmd_leaf-behavior-with-pmd_mkinvalid.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Ryan Roberts <ryan.roberts@arm.com>
Subject: mm/debug_vm_pgtable: test pmd_leaf() behavior with pmd_mkinvalid()
Date: Wed, 1 May 2024 15:44:39 +0100

An invalidated pmd should still cause pmd_leaf() to return true.  Let's
test for that to ensure all arches remain consistent.

Link: https://lkml.kernel.org/r/20240501144439.1389048-1-ryan.roberts@arm.com
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/debug_vm_pgtable.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/debug_vm_pgtable.c~mm-debug_vm_pgtable-test-pmd_leaf-behavior-with-pmd_mkinvalid
+++ a/mm/debug_vm_pgtable.c
@@ -982,6 +982,7 @@ static void __init pmd_thp_tests(struct
 #ifndef __HAVE_ARCH_PMDP_INVALIDATE
 	WARN_ON(!pmd_trans_huge(pmd_mkinvalid(pmd_mkhuge(pmd))));
 	WARN_ON(!pmd_present(pmd_mkinvalid(pmd_mkhuge(pmd))));
+	WARN_ON(!pmd_leaf(pmd_mkinvalid(pmd_mkhuge(pmd))));
 #endif /* __HAVE_ARCH_PMDP_INVALIDATE */
 }
 
_

Patches currently in -mm which might be from ryan.roberts@arm.com are

fs-proc-task_mmu-fix-loss-of-young-dirty-bits-during-pagemap-scan.patch
fs-proc-task_mmu-fix-uffd-wp-confusion-in-pagemap_scan_pmd_entry.patch
selftests-mm-soft-dirty-should-fail-if-a-testcase-fails.patch
mm-fix-race-between-__split_huge_pmd_locked-and-gup-fast.patch
mm-debug_vm_pgtable-test-pmd_leaf-behavior-with-pmd_mkinvalid.patch