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 4DABF39A06D for ; Sat, 3 Oct 2026 22:38:36 +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=1791067118; cv=none; b=MdQ02Fblz9REZ97GawvO0J5TeZfyJWCpGphfMGjAeldaAJVMmLmphkalQtfrP1svciHCPgRPS8Y18yf2MRWOpRvCBX+U1ZE1rA0fxI+PxcH9KTQ7PrTnOPy9Wk6ynzRtcK1Hs7ydVfXR18ZLpSOQd+94uJyAMaFL4S5gh/1M4/Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791067118; c=relaxed/simple; bh=hDOhB3n8wdrlbGXw9yxBlBlfF2D2PWtNPcuvtZAhKTk=; h=Date:To:From:Subject:Message-Id; b=Y+bKWz23zu3669RjTDobo6O9vwwhkU6ICL9lMt1tlqEggSjTvJ1gvhS6emCS2ijkspe+dt1q9z0ajMIx3EnQDs+O1KxHsX9goW4EfXoOghvQcrH4Fg5ws8HZ3Q1dpjyGoLQ28iYBu08dVZRix8/hR71T5KkoD7S2ek+hDOpyDOs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=kZ+brvO3; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="kZ+brvO3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2611E1F0089D; Sat, 3 Oct 2026 22:38:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1791067116; bh=lfki16357UaX0lXTlAdvJqWAQrJY5bzozAhDD52JRT0=; h=Date:To:From:Subject; b=kZ+brvO33iEMiTc5qjaN7L5yi8knm2VTLFbwU/dx3ldWLK1cWbhM0hZy6vEu1L8v3 bbLe2l/7mM2pqkm0m/LbAjMNNwHVx0sMGhfZAn1Pi2voOf5jKbB6Al/8kDgNws8VxD Fw0pDmx1sxlii1mlvcOfc3Pv0HsXacJLN8evYy5s= Date: Sat, 03 Oct 2026 15:38:35 -0700 To: mm-commits@vger.kernel.org,ljs@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: [to-be-updated] alsa-pcm-use-vm_insert_page-to-map-pcm-status-page.patch removed from -mm tree Message-Id: <20261003223836.2611E1F0089D@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: ALSA: pcm: use vm_insert_page() to map PCM status page has been removed from the -mm tree. Its filename was alsa-pcm-use-vm_insert_page-to-map-pcm-status-page.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: "Lorenzo Stoakes (ARM)" Subject: ALSA: pcm: use vm_insert_page() to map PCM status page Date: Thu, 17 Sep 2026 17:22:22 +0100 There's no need to keep a fault handler around for this, instead map on mmap. While we're here, rename area to vma to be consistent. This correctly makes the mapping a mixed map mapping. This works towards establishing the invariant that only PFN mapped or mixed map mappings may clear the VM_MAYWRITE flag. The status page mapping clears VM_MAYWRITE, so it must be kernel-owned; the control page mapping remains writable and is left fault-based. The assumption is made that the struct pcm_mmap_status structure is at most a page in size, which is asserted as a build bug. This is safe to assume, as the size of the structure is 56 bytes at most. Link: https://lore.kernel.org/20260917-b4-mmap-prepare-vma-flag-sanify-v3-13-4583d8a23bca@kernel.org Signed-off-by: Lorenzo Stoakes (ARM) Signed-off-by: Andrew Morton Acked-by: Takashi Iwai Cc: Albert Ou Cc: Alexander Gordeev Cc: Alexei Starovoitov Cc: Alistair Popple Cc: Al Viro Cc: Andreas Larsson Cc: Andrii Nakryiko Cc: "Aneesh Kumar K.V" Cc: Anup Patel Cc: Arnaldo Carvalho de Melo Cc: Arnd Bergmann Cc: Axel Rasmussen Cc: Baolin Wang Cc: Baoquan He Cc: Barry Song Cc: "Borislav Petkov (AMD)" Cc: Byungchul Park Cc: Catalin Marinas Cc: Chengming Zhou Cc: Chris Li Cc: Christian Borntraeger Cc: Christian Brauner Cc: Claudio Imbrenda Cc: Dave Airlie Cc: Dave Hansen Cc: David Hildenbrand Cc: David S. Miller Cc: Dennis Dalessandro Cc: Dev Jain Cc: Doug Gilbert Cc: Eduard Zingerman Cc: Emil Tsalapatis Cc: Gerald Schaefer Cc: Greg Kroah-Hartman Cc: Gregory Price Cc: Harry Yoo Cc: Heiko Carstens Cc: Helge Deller Cc: "Huang, Ying" Cc: Ingo Molnar Cc: James Bottomley Cc: Jan Kara Cc: Jann Horn Cc: Janosch Frank Cc: Jaroslav Kysela Cc: Jason Gunthorpe Cc: Jaya Kumar Cc: Johannes Weiner Cc: John Hubbard Cc: Jonathan Corbet Cc: Joshua Hahn Cc: Juri Lelli Cc: Kairui Song Cc: Kemeng Shi Cc: Kiryl Shutsemau Cc: Kumar Kartikeya Dwivedi Cc: Lance Yang Cc: Leon Romanovsky Cc: Liam R. Howlett Cc: Maarten Lankhorst Cc: Madhavan Srinivasan Cc: Marc Rutland Cc: Marc Zyngier Cc: "Masami Hiramatsu (Google)" Cc: Matthew Brost Cc: Matthew Wilcox (Oracle) Cc: Maxime Ripard Cc: Michal Hocko Cc: Michal Hocko Cc: Mike Rapoport Cc: Miklos Szeredi Cc: Muchun Song Cc: Namhyung kim Cc: Nhat Pham Cc: Nicholas Piggin Cc: Oleg Nesterov Cc: Oscar Salvador Cc: Palmer Dabbelt Cc: Paul Moore Cc: Pedro Falcato Cc: Peter Xu Cc: Peter Zijlstra Cc: Rakie Kim Cc: Rik van Riel Cc: Ryan Roberts Cc: Sebastian Reichel Cc: Shakeel Butt Cc: Stephen Smalley Cc: Suren Baghdasaryan Cc: Takashi Iwai Cc: Thomas Zimemrmann Cc: Vasily Gorbik Cc: Vincent Guittot Cc: Vlastimil Babka Cc: Wei Xu Cc: Will Deacon Cc: Yuanchu Xie Cc: Zi Yan --- sound/core/pcm_native.c | 38 +++++++++++++------------------------- 1 file changed, 13 insertions(+), 25 deletions(-) --- a/sound/core/pcm_native.c~alsa-pcm-use-vm_insert_page-to-map-pcm-status-page +++ a/sound/core/pcm_native.c @@ -3760,39 +3760,27 @@ static __poll_t snd_pcm_poll(struct file /* * mmap status record */ -static vm_fault_t snd_pcm_mmap_status_fault(struct vm_fault *vmf) +static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, + struct vm_area_struct *vma) { - struct snd_pcm_substream *substream = vmf->vma->vm_private_data; + const unsigned long size = vma->vm_end - vma->vm_start; struct snd_pcm_runtime *runtime; - - if (substream == NULL) - return VM_FAULT_SIGBUS; - runtime = substream->runtime; - vmf->page = virt_to_page(runtime->status); - get_page(vmf->page); - return 0; -} + struct page *page; -static const struct vm_operations_struct snd_pcm_vm_ops_status = -{ - .fault = snd_pcm_mmap_status_fault, -}; + BUILD_BUG_ON(sizeof(struct snd_pcm_mmap_status) > PAGE_SIZE); -static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, - struct vm_area_struct *area) -{ - long size; - if (!(area->vm_flags & VM_READ)) + if (!(vma->vm_flags & VM_READ)) return -EINVAL; - size = area->vm_end - area->vm_start; - if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) + if (size != PAGE_SIZE) return -EINVAL; - area->vm_ops = &snd_pcm_vm_ops_status; - area->vm_private_data = substream; - vm_flags_mod(area, VM_DONTEXPAND | VM_DONTDUMP, + + vm_flags_mod(vma, VM_DONTEXPAND | VM_DONTDUMP, VM_WRITE | VM_MAYWRITE); + vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); - return 0; + runtime = substream->runtime; + page = virt_to_page(runtime->status); + return vm_insert_page(vma, vma->vm_start, page); } /* _ Patches currently in -mm which might be from ljs@kernel.org are mm-mremap-fix-locked_vm-leak-from-mremap_dontunmap-self-merge.patch mm-mremap-fix-locked_vm-leak-by-splitting-vma-for-mremap_dontunmap.patch drivers-char-mem-mmap-readonly-map_shared-dev-zero-correctly.patch mm-vmpressure-remove-window-size-todo.patch tools-testing-selftests-mm-add-missing-gitignore-entries.patch mm-move-drivers-char-memc-to-mm-char-memc.patch mm-implement-file_is_dev_zero-to-uniquely-identify-dev-zero.patch mm-vma-only-permit-map_private-dev-zero-to-be-mapped-anonymous.patch mm-vma-make-map_private-mapped-dev-zero-mappings-truly-anonymous.patch tools-testing-vma-add-test-to-assert-map_private-dev-zero-is-anon.patch tools-testing-selftests-mm-add-map_private-dev-zero-merge-tests.patch mm-madvise-swap-in-cowd-map_private-file-mappings-on-madv_willneed.patch mm-khugepaged-deposit-a-newly-allocated-page-table-on-collapse.patch mm-enable-mmu_gather_rcu_table_free-for-most-2-level-architectures.patch mm-enable-mmu_gather_rcu_table_free-for-mmu-riscv.patch mm-enable-mmu_gather_rcu_table_free-for-mmu-arm.patch mm-enable-mmu_gather_rcu_table_free-for-arc-microblaze-xtensa.patch mm-enable-mmu_gather_rcu_table_free-for-sparc64.patch mm-enable-mmu_gather_rcu_table_free-for-m68k-coldfire.patch mm-enable-mmu_gather_rcu_table_free-for-sh-x2.patch mm-enable-mmu_gather_rcu_table_free-for-m68k-motorola.patch mm-enable-mmu_gather_rcu_table_free-for-sparc32.patch mm-userland-pgtable-freeing-is-rcu-safe-now-remove-leftover-bits.patch mm-change-the-contract-for-free_pgtables-update-docs.patch bpf-arena-mark-arena_map_mmap-mappings-vm_mixedmap.patch mm-vma-add-vma_is_kernel_owned-predicates.patch mm-vma-only-allow-mmap-to-clear-vma_maywrite_bit-if-kernel-owned.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-only-kernel-owned-mappings-may-set-vma_io_bit.patch mm-remove-vma_io_bit-check-in-vma_is_kernel_owned.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_persistent.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-introduce-and-use-vma_can_gup.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