The patch titled Subject: mm/migrate_device.c: add missing flush_cache_page() has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-migrate_devicec-add-missing-flush_cache_page.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

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

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------------------------------------------------------ From: Alistair Popple apopple@nvidia.com Subject: mm/migrate_device.c: add missing flush_cache_page() Date: Fri, 2 Sep 2022 10:35:52 +1000

Currently we only call flush_cache_page() for the anon_exclusive case, however in both cases we clear the pte so should flush the cache.

Link: https://lkml.kernel.org/r/5676f30436ab71d1a587ac73f835ed8bd2113ff5.166207852... Fixes: 8c3328f1f36a ("mm/migrate: migrate_vma() unmap page from vma while collecting pages") Signed-off-by: Alistair Popple apopple@nvidia.com Reviewed-by: David Hildenbrand david@redhat.com Cc: Alex Sierra alex.sierra@amd.com Cc: Ben Skeggs bskeggs@redhat.com Cc: Felix Kuehling Felix.Kuehling@amd.com Cc: huang ying huang.ying.caritas@gmail.com Cc: "Huang, Ying" ying.huang@intel.com Cc: Jason Gunthorpe jgg@nvidia.com Cc: John Hubbard jhubbard@nvidia.com Cc: Karol Herbst kherbst@redhat.com Cc: Logan Gunthorpe logang@deltatee.com Cc: Lyude Paul lyude@redhat.com Cc: Matthew Wilcox willy@infradead.org Cc: Nadav Amit nadav.amit@gmail.com Cc: Paul Mackerras paulus@ozlabs.org Cc: Peter Xu peterx@redhat.com Cc: Ralph Campbell rcampbell@nvidia.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

mm/migrate_device.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/migrate_device.c~mm-migrate_devicec-add-missing-flush_cache_page +++ a/mm/migrate_device.c @@ -193,9 +193,9 @@ again: bool anon_exclusive; pte_t swp_pte;

+ flush_cache_page(vma, addr, pte_pfn(*ptep)); anon_exclusive = PageAnon(page) && PageAnonExclusive(page); if (anon_exclusive) { - flush_cache_page(vma, addr, pte_pfn(*ptep)); ptep_clear_flush(vma, addr, ptep);

if (page_try_share_anon_rmap(page)) { _

Patches currently in -mm which might be from apopple@nvidia.com are

mm-migrate_devicec-flush-tlb-while-holding-ptl.patch mm-migrate_devicec-add-missing-flush_cache_page.patch mm-migrate_devicec-copy-pte-dirty-bit-to-page.patch mm-gupc-simplify-and-fix-check_and_migrate_movable_pages-return-codes.patch selftests-hmm-tests-add-test-for-dirty-bits.patch mm-gupc-dont-pass-gup_flags-to-check_and_migrate_movable_pages.patch mm-gupc-refactor-check_and_migrate_movable_pages.patch mm-migrate_devicec-fix-a-misleading-and-out-dated-comment.patch