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 60AAE318ED2 for ; Tue, 15 Sep 2026 01:09:15 +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=1789434556; cv=none; b=EhtbTMTPXa/YijeiKzEbg55Pyx274y+g6zADQqwoVSnglpYJTGW4IEyniQdChjewoGnxDh2JZP+zF7wgLt37330tdRO/cgdKF940LwFk5hn2hdxni4ukyu4gJCZY+x8iD0lIJdgxv9tDDbYjFScOqZVqcbNHtndR/ee05xj/oxI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789434556; c=relaxed/simple; bh=/kK9BYvNYqIP8h6pMUdGzbsLZAdb+FGOeCaFWGHkX8E=; h=Date:To:From:Subject:Message-Id; b=WyTJMS1aOM0dSIapHoVq8gO7NY/PVs64QLRnCuefxJmj6yrD1g+VUvjqx2o5YfCYfXGNrKwDOshA/pVKiV0sDHB4UbTYMJPkMOkaLARrC8iEqtBDx529oBcUt9SqOeNsaEx5/6Gxr7m6gnzi2xmwEl1Nx/ai8WS9Zj7P0dbelMs= 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=xvB7Cdzs; 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="xvB7Cdzs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A890A1F000FF; Tue, 15 Sep 2026 01:09:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1789434554; bh=/mKRMk+Y+JAVeO2YOvNNTHEe3xE+LSIIYmtAAJDZSTw=; h=Date:To:From:Subject; b=xvB7Cdzsu4wFPkz2X51OJTSrlu7s2CP4yoZM0lzCfgwnLRhMPKnFdFmjpICba4w69 ZHAk2SlCnfTNzfarsJayX6fcx4+cJ1DEe6sKk2LiEOQLzZG0bECVQThtUD7K+fQiAg thp4/Xy549F47JLIi+muGHqHRaNT1fay4fx3yNW4= Date: Mon, 14 Sep 2026 18:09:14 -0700 To: mm-commits@vger.kernel.org,ljs@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + hsi-cmt_speech-convert-mmap-hook-to-mmap_prepare-refactor.patch added to mm-new branch Message-Id: <20260915010914.A890A1F000FF@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: HSI: cmt_speech: convert mmap hook to mmap_prepare, refactor has been added to the -mm mm-new branch. Its filename is hsi-cmt_speech-convert-mmap-hook-to-mmap_prepare-refactor.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/hsi-cmt_speech-convert-mmap-hook-to-mmap_prepare-refactor.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: "Lorenzo Stoakes (ARM)" Subject: HSI: cmt_speech: convert mmap hook to mmap_prepare, refactor Date: Mon, 14 Sep 2026 15:57:40 +0100 Use the mmap_prepare in favour of the deprecated mmap hook as part of the work to convert one to another. Since this is simply a refcounted kernel page that has been allocated, it should not be marked VM_IO and should be inserted using the kernel page insertion mechanism, so convert it to do this instead. Use the VMA descriptor's private data field as a scratch buffer to store the page in - this stays valid throughout the kernel page mapping operation. Link: https://lore.kernel.org/20260914-b4-mmap-prepare-vma-flag-sanify-v2-20-7d9781ed5361@kernel.org Signed-off-by: Lorenzo Stoakes (ARM) Signed-off-by: Andrew Morton --- drivers/hsi/clients/cmt_speech.c | 33 +++++++---------------------- 1 file changed, 9 insertions(+), 24 deletions(-) --- a/drivers/hsi/clients/cmt_speech.c~hsi-cmt_speech-convert-mmap-hook-to-mmap_prepare-refactor +++ a/drivers/hsi/clients/cmt_speech.c @@ -1084,22 +1084,6 @@ static void cs_hsi_stop(struct cs_hsi_if kfree(hi); } -static vm_fault_t cs_char_vma_fault(struct vm_fault *vmf) -{ - struct cs_char *csdata = vmf->vma->vm_private_data; - struct page *page; - - page = virt_to_page((void *)csdata->mmap_base); - get_page(page); - vmf->page = page; - - return 0; -} - -static const struct vm_operations_struct cs_char_vm_ops = { - .fault = cs_char_vma_fault, -}; - static int cs_char_fasync(int fd, struct file *file, int on) { struct cs_char *csdata = file->private_data; @@ -1256,18 +1240,19 @@ static long cs_char_ioctl(struct file *f return r; } -static int cs_char_mmap(struct file *file, struct vm_area_struct *vma) +static int cs_char_mmap_prepare(struct vm_area_desc *desc) { - if (vma->vm_end < vma->vm_start) - return -EINVAL; + struct file *file = desc->file; + struct cs_char *csdata = file->private_data; + struct page **pages = (struct page **)&desc->private_data; - if (vma_pages(vma) != 1) + if (vma_desc_pages(desc) != 1) return -EINVAL; - vm_flags_set(vma, VM_IO | VM_DONTDUMP | VM_DONTEXPAND); - vma->vm_ops = &cs_char_vm_ops; - vma->vm_private_data = file->private_data; + vma_desc_set_flags(desc, VMA_DONTDUMP_BIT, VMA_DONTEXPAND_BIT); + *pages = virt_to_page((void *)csdata->mmap_base); + mmap_action_map_kernel_pages_full(desc, pages); return 0; } @@ -1353,7 +1338,7 @@ static const struct file_operations cs_c .write = cs_char_write, .poll = cs_char_poll, .unlocked_ioctl = cs_char_ioctl, - .mmap = cs_char_mmap, + .mmap_prepare = cs_char_mmap_prepare, .open = cs_char_open, .release = cs_char_release, .fasync = cs_char_fasync, _ Patches currently in -mm which might be from ljs@kernel.org are 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-huge_memory-zap-deposited-page-tables-after-an-rcu-grace-period.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-make-userland-page-table-freeing-rcu-safe.patch mm-change-the-contract-for-free_pgtables-update-docs.patch mm-vma-fix-mmap_prepare-file-handling-remove-file_doesnt_need_get.patch mm-vma-predicate-setting-mmap_prepare-vma-fields-on-new-vma-alloc.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_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