The quilt patch titled
Subject: mm/debug_vm_pgtable: add tests for __HAVE_ARCH_PTE_SWP_EXCLUSIVE
has been removed from the -mm tree. Its filename was
mm-debug_vm_pgtable-add-tests-for-__have_arch_pte_swp_exclusive.patch
This patch was dropped because it was merged into mm-stable
------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
Subject: mm/debug_vm_pgtable: add tests for __HAVE_ARCH_PTE_SWP_EXCLUSIVE
Let's test that __HAVE_ARCH_PTE_SWP_EXCLUSIVE works as expected.
Link: https://lkml.kernel.org/r/20220329164329.208407-3-david@xxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Don Dutile <ddutile@xxxxxxxxxx>
Cc: Gerald Schaefer <gerald.schaefer@xxxxxxxxxxxxx>
Cc: Heiko Carstens <hca@xxxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: Jann Horn <jannh@xxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Liang Zhang <zhangliang5@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: Nadav Amit <namit@xxxxxxxxxx>
Cc: Oded Gabbay <oded.gabbay@xxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Pedro Demarchi Gomes <pedrodemargomes@xxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxxx>
Cc: Roman Gushchin <guro@xxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/debug_vm_pgtable.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
--- a/mm/debug_vm_pgtable.c~mm-debug_vm_pgtable-add-tests-for-__have_arch_pte_swp_exclusive
+++ a/mm/debug_vm_pgtable.c
@@ -837,6 +837,19 @@ static void __init pmd_soft_dirty_tests(
static void __init pmd_swap_soft_dirty_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+static void __init pte_swap_exclusive_tests(struct pgtable_debug_args *args)
+{
+#ifdef __HAVE_ARCH_PTE_SWP_EXCLUSIVE
+ pte_t pte = pfn_pte(args->fixed_pte_pfn, args->page_prot);
+
+ pr_debug("Validating PTE swap exclusive\n");
+ pte = pte_swp_mkexclusive(pte);
+ WARN_ON(!pte_swp_exclusive(pte));
+ pte = pte_swp_clear_exclusive(pte);
+ WARN_ON(pte_swp_exclusive(pte));
+#endif /* __HAVE_ARCH_PTE_SWP_EXCLUSIVE */
+}
+
static void __init pte_swap_tests(struct pgtable_debug_args *args)
{
swp_entry_t swp;
@@ -1295,6 +1308,8 @@ static int __init debug_vm_pgtable(void)
pte_swap_soft_dirty_tests(&args);
pmd_swap_soft_dirty_tests(&args);
+ pte_swap_exclusive_tests(&args);
+
pte_swap_tests(&args);
pmd_swap_tests(&args);
_
Patches currently in -mm which might be from david@xxxxxxxxxx are
