From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 05EE240099C for ; Fri, 9 Oct 2026 05:57:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791525456; cv=none; b=LLAwojjoPwLLE+J6r8jEy2wFTL5Js+QolpfjzveLB4kMBmUhz6953SngXS2kMxjdAx+0EHgtEWW5IeqCkUisKbVe13JnwS+Fzxq5LkkBM7m8MHfxFQysHtzNXxgBSVMHLU7byvI2GsCIBUDtHLTnd/X9+c3b2yORGBKH8SH7RYs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791525456; c=relaxed/simple; bh=olKqtGZHXgVkW4crw2EXD47ueeutokQghJOrKKuiLjo=; h=Date:To:From:Subject:Message-Id; b=WDYjTM3yRUc7iuGuMbFrO7o3AeRgJC6xRAYgmzmsQbkxIeYUVFpyzCIxt3nawDMFnsATzBY2BpfaeQfPy1val05wHSr/KP2A6Y9PncdBax4OTf6P6q9m1rOY9BRYccJga1N47v12ndYQ8e9jKCGqyfQtDMgFq0n7ho2BBowWTtQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=fail (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=pDL/vgbi reason="signature verification failed"; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="pDL/vgbi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8616B1F00893; Fri, 9 Oct 2026 05:57:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1791525454; bh=fF/5Far1rUUg0wU2JKERQ2Jm9njpZogOV8kwAoUQGK4=; h=Date:To:From:Subject; b=pDL/vgbicGnyxWxnLLIS5Re9FAuhenULXPVMUf0XQXm8zghShLPj+H1H2qdRzSYCp Jo6LwMUJbEA1ZcHlOx+Lf0mZhhCpugI2x3iUWXE9AVzMwY2zjAANCSs/bwAF+NKzHU Xd7qC+TwBSajlxBdjxzacD4U48ujLWL1SW9KY5yo= Date: Thu, 08 Oct 2026 22:57:34 -0700 To: mm-commits@vger.kernel.org,ziy@nvidia.com,ysato@users.sourceforge.jp,will@kernel.org,vgupta@kernel.org,vbabka@kernel.org,usama.arif@linux.dev,tsbogend@alpha.franken.de,tglx@kernel.org,svens@linux.ibm.com,surenb@google.com,stefan.kristiansson@saunalahti.fi,shorne@gmail.com,shakeel.butt@linux.dev,schuster.simon@siemens-energy.com,ryan.roberts@arm.com,rppt@kernel.org,richard@nod.at,richard.henderson@linaro.org,rdunlap@infradead.org,qi.zheng@linux.dev,pjw@kernel.org,peterz@infradead.org,peterx@redhat.com,palmer@dabbelt.com,npiggin@gmail.com,nico.pache@linux.dev,mpe@ellerman.id.au,monstr@monstr.eu,mingo@redhat.com,mhocko@suse.com,mattst88@gmail.com,mark.rutland@arm.com,maddy@linux.ibm.com,linux@armlinux.org.uk,linmag7@gmail.com,liam@infradead.org,lance.yang@linux.dev,kernel@xen0n.name,kas@kernel.org,jonas@southpole.se,johannes@sipsolutions.net,jhubbard@nvidia.com,jgg@ziepe.ca,jcmvbkbc@gmail.com,james.bottomley@hansenpartnership.com,hughd@google.com,hpa@zytor.com,hca@linux.ibm.com,guor en@kernel.org,gor@linux.ibm.com,glaubitz@physik.fu-berlin.de,geert@linux-m68k.org,dinguyen@kernel.org,dev.jain@arm.com,deller@gmx.de,david@kernel.org,davem@davemloft.net,dave.hansen@linux.intel.com,dalias@libc.org,corbet@lwn.net,chris@zankel.net,chleroy@kernel.org,chenhuacai@kernel.org,catalin.marinas@arm.com,bp@alien8.de,borntraeger@linux.ibm.com,bcain@kernel.org,baolin.wang@linux.alibaba.com,baohua@kernel.org,arnd@arndb.de,aou@eecs.berkeley.edu,anton.ivanov@cambridgegreys.com,aneesh.kumar@kernel.org,andreas@gaisler.com,alex@ghiti.fr,agordeev@linux.ibm.com,ljs@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] mm-enable-mmu_gather_rcu_table_free-for-most-2-level-architectures.patch removed from -mm tree Message-Id: <20261009055734.8616B1F00893@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm: enable MMU_GATHER_RCU_TABLE_FREE for most 2-level architectures has been removed from the -mm tree. Its filename was mm-enable-mmu_gather_rcu_table_free-for-most-2-level-architectures.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: "Lorenzo Stoakes (ARM)" Subject: mm: enable MMU_GATHER_RCU_TABLE_FREE for most 2-level architectures Date: Fri, 25 Sep 2026 21:09:37 +0100 Commit e3ecf7c7d082 ("mm: pgtable: convert some architectures to use tlb_remove_ptdesc()") updated a number of architectures from using pagetable_dtor() + tlb_remove_page_ptdesc() to using tlb_remove_ptdesc() in __pte_free_tlb(). This is meaningful as tlb_remove_ptdesc() allows for RCU page table freeing if CONFIG_MMU_GATHER_RCU_TABLE_FREE is specified. The csky, hexagon, nios2, openrisc, sh (except X2) and m68k-sun3 architectures all have 2 levels of page tables, so the only page tables ever freed by mmu_gather are PTEs, so this update suffices to ensure that every page table freed by the mmu_gather mechanism is freed under RCU. Therefore, update all of these architectures to select CONFIG_MMU_GATHER_RCU_TABLE_FREE. This forms part of an overall effort to switch every architecture to this mode. Link: https://lore.kernel.org/20260925-rcu-pagetable-freeing-v5-2-31e91065fea4@kernel.org Signed-off-by: Lorenzo Stoakes (ARM) Signed-off-by: Andrew Morton Acked-by: Kiryl Shutsemau (Meta) Reviewed-by: Lance Yang Cc: David Hildenbrand Cc: Zi Yan Cc: Baolin Wang Cc: Liam R. Howlett Cc: Nico Pache Cc: Ryan Roberts Cc: Dev Jain Cc: Barry Song Cc: Usama Arif Cc: Guo Ren Cc: Brian Cain Cc: Geert Uytterhoeven Cc: Dinh Nguyen Cc: Simon Schuster Cc: Jonas Bonn Cc: Stefan Kristiansson Cc: Stafford Horne Cc: Rich Felker Cc: John Paul Adrian Glaubitz Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: Alexandre Ghiti Cc: Russell King Cc: Vineet Gupta Cc: Michal Simek Cc: Chris Zankel Cc: Max Filippov Cc: Will Deacon Cc: Aneesh Kumar K.V Cc: Nicholas Piggin Cc: Peter Zijlstra Cc: David S. Miller Cc: Andreas Larsson Cc: Richard Henderson Cc: Matt Turner Cc: Magnus Lindholm Cc: Catalin Marinas Cc: Mark Rutland Cc: Huacai Chen Cc: WANG Xuerui Cc: Thomas Bogendoerfer Cc: James Bottomley Cc: Helge Deller Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Christophe Leroy Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Alexander Gordeev Cc: Christian Borntraeger Cc: Sven Schnelle Cc: Richard Weinberger Cc: Anton Ivanov Cc: Johannes Berg Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: H. Peter Anvin Cc: Arnd Bergmann Cc: Vlastimil Babka Cc: Mike Rapoport Cc: Suren Baghdasaryan Cc: Michal Hocko Cc: Jason Gunthorpe Cc: John Hubbard Cc: Peter Xu Cc: Yoshinori Sato Cc: Shakeel Butt Cc: Jonathan Corbet Cc: Randy Dunlap Cc: Hugh Dickins Cc: Qi Zheng --- arch/csky/Kconfig | 1 + arch/hexagon/Kconfig | 1 + arch/m68k/Kconfig | 1 + arch/nios2/Kconfig | 1 + arch/openrisc/Kconfig | 1 + arch/sh/Kconfig | 1 + 6 files changed, 6 insertions(+) --- a/arch/csky/Kconfig~mm-enable-mmu_gather_rcu_table_free-for-most-2-level-architectures +++ a/arch/csky/Kconfig @@ -96,6 +96,7 @@ config CSKY select HAVE_SYSCALL_TRACEPOINTS select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU select LOCK_MM_AND_FIND_VMA + select MMU_GATHER_RCU_TABLE_FREE select MAY_HAVE_SPARSE_IRQ select MODULES_USE_ELF_RELA if MODULES select OF --- a/arch/hexagon/Kconfig~mm-enable-mmu_gather_rcu_table_free-for-most-2-level-architectures +++ a/arch/hexagon/Kconfig @@ -23,6 +23,7 @@ config HEXAGON # select HAVE_CLK select GENERIC_ATOMIC64 select HAVE_PERF_EVENTS + select MMU_GATHER_RCU_TABLE_FREE # GENERIC_ALLOCATOR is used by dma_alloc_coherent() select GENERIC_ALLOCATOR select GENERIC_IRQ_PROBE --- a/arch/m68k/Kconfig~mm-enable-mmu_gather_rcu_table_free-for-most-2-level-architectures +++ a/arch/m68k/Kconfig @@ -36,6 +36,7 @@ config M68K select HAVE_MOD_ARCH_SPECIFIC select HAVE_UID16 select MMU_GATHER_NO_RANGE if MMU + select MMU_GATHER_RCU_TABLE_FREE if MMU && SUN3 select MODULES_USE_ELF_REL select MODULES_USE_ELF_RELA select NO_DMA if !MMU && !COLDFIRE --- a/arch/nios2/Kconfig~mm-enable-mmu_gather_rcu_table_free-for-most-2-level-architectures +++ a/arch/nios2/Kconfig @@ -19,6 +19,7 @@ config NIOS2 select HAVE_PAGE_SIZE_4KB select IRQ_DOMAIN select LOCK_MM_AND_FIND_VMA + select MMU_GATHER_RCU_TABLE_FREE select MODULES_USE_ELF_RELA select OF select OF_EARLY_FLATTREE --- a/arch/openrisc/Kconfig~mm-enable-mmu_gather_rcu_table_free-for-most-2-level-architectures +++ a/arch/openrisc/Kconfig @@ -35,6 +35,7 @@ config OPENRISC select GENERIC_ATOMIC64 select GENERIC_CLOCKEVENTS_BROADCAST select GENERIC_SMP_IDLE_THREAD + select MMU_GATHER_RCU_TABLE_FREE select MODULES_USE_ELF_RELA select HAVE_DEBUG_STACKOVERFLOW select OR1K_PIC --- a/arch/sh/Kconfig~mm-enable-mmu_gather_rcu_table_free-for-most-2-level-architectures +++ a/arch/sh/Kconfig @@ -61,6 +61,7 @@ config SUPERH select HAVE_SYSCALL_TRACEPOINTS select IRQ_FORCED_THREADING select LOCK_MM_AND_FIND_VMA + select MMU_GATHER_RCU_TABLE_FREE if MMU && !X2TLB select MODULES_USE_ELF_RELA select NEED_SG_DMA_LENGTH select NO_DMA if !MMU && !DMA_COHERENT _ Patches currently in -mm which might be from ljs@kernel.org are mm-vma-fix-mmap_prepare-file-handling-remove-file_doesnt_need_get.patch mm-vma-introduce-and-use-vma_can_merge.patch mm-consistently-validate-vma-state-after-mmap-hooks.patch mm-vma-ensure-mmap_prepare-doesnt-set-actions-on-a-mergeable-vma.patch mm-make-map_kernel_pages_-internal-and-unexported.patch mm-vma-tidy-up-map-kernel-pages-enum-values.patch mm-add-mmap-action-for-discontiguous-kernel-page-mapping.patch docs-filesystems-update-mmap_prepare-docs-for-discontig-kernel-pgs.patch drivers-usb-mon-update-to-use-mmap_prepare-map-kernel-pages.patch infiniband-update-hfi1-to-use-remap_vmalloc_range.patch selinux-reject-writable-opens-of-policy-file-drop-mmap-shared-write-check.patch alsa-pcm-use-vm_insert_page-to-map-pcm-status-page.patch bpf-arena-mark-arena_map_mmap-mappings-vm_mixedmap.patch mm-vma-add-vma_is_mm_managed-predicates.patch mm-vma-only-allow-mmap-to-clear-vma_maywrite_bit-if-not-mm-managed.patch mm-vma-add-and-use-vma__is_fixed_mapping.patch scsi-sg-convert-mmap-hook-to-mmap_prepare-and-rework.patch fbdev-defio-assert-fbinfo_virtfb-drop-vm_io-add-vm_mixedmap.patch hsi-cmt_speech-convert-mmap-hook-to-mmap_prepare-refactor.patch mm-gup-error-out-early-on-vma_mayread_bit-vmas.patch uprobes-remove-vm_io-set-vm_mixedmap-for-mapped-kernel-pages.patch mm-mlock-clear-vma_locked_mask-over-mmap-callback.patch mm-mlock-eliminate-weird-vma_io_bit-abuse-and-simplify.patch mm-vma-enforce-that-mm-managed-mappings-may-not-set-vma_io_bit.patch mm-remove-vma_io_bit-check-in-vma_is_mm_managed.patch mm-remove-hugetlb_inlineh.patch mm-rename-is_vm_hugetlb_page-to-vma_is_hugetlb.patch mm-drop-some-redundant-checks-around-hugetlb-vmas.patch mm-madvise-update-is_valid_guard_vma-to-use-vma_can_merge.patch mm-vma-introduce-vma_is_mm_backed.patch mm-uffd-use-predicates-for-userfaultfd-checks.patch mm-madvise-use-predicates-for-madvise-madv_dofork.patch mm-eliminate-vma_special_flags-usage-when-hugetlb-explicitly-tested.patch mm-eliminate-vma_special_flags-check-in-lru_gen_look_around.patch mm-avoid-use-of-vma_special_flags-in-migrate_vma_setup.patch mm-eliminate-vm_special-vma_special_flags.patch fuse-dax-do-not-set-vm_mixedmap.patch mm-huge_memory-remove-vma_is_special_huge.patch mm-vma-const-ify-vma_assert_stabilised-and-associated-functions.patch mm-implement-and-use-vma_has_anon_rmap-silence-kcsan.patch mm-update-comments-to-refer-to-anon-rmap-rather-than-anon_vma.patch mm-vma-dont-remove-vma-from-rmap-if-pgoff-unchanged.patch