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 C7449333439 for ; Sat, 10 Oct 2026 21:39:57 +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=1791668399; cv=none; b=hVc02Xv0ctLck2uh7hoDZ69MI6MLMDzCm0Hk5D5RhQIX2A+j0o5qKFu/vEQuI434wOQcBeE0LE5F67eL1GwRIKo+rjaIENmCYNxuJyVvYHEsvxK8EjZsfJv5kvuZ7pfmOwmtpqpN2v15XCqkrblRwwljNcnr/AMNIRmRor9bR9k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791668399; c=relaxed/simple; bh=aUnwxsHezOdHE3ZEtiT7+6bYuW8vC1fg3mtloLSRpk0=; h=Date:To:From:Subject:Message-Id; b=AXDGW/shBkXvue6t1fsQQlAoNqFfKcteP5ysWwHky2Andqz3fmOg9oiweSobMJVKX3Hryj7ym7OwqFNO8nBxFHIJK0DTjBwmeSdLyhpuhd8qwIAoztGNchRkFlAyfeLFoB6Lsag5yaD/vLPdTI9s0ccHy91M0oy9mVj7Wu94XUA= 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=Y3amZXK9; 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="Y3amZXK9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9E9E41F000FF; Sat, 10 Oct 2026 21:39:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1791668397; bh=jtqMmnlJ68i/ZbKGRG/ORIJPs2/HMJOcttm4ZT2qzb0=; h=Date:To:From:Subject; b=Y3amZXK9STC0JtSqKRoeAYksc6iBSM3yWpgnQkmgyELCTBOfzO1kDIz41iKOi++/Y 6jucGeWQ/b3J3y2BB1itrIsDYaEXwTLgYsl+qk0oiu1nTNtZC/S48vV2Jlw6c/oI/i ElvtHbXke1GBW2FGroUGSpjoyD8KiYK78yQWItIg= Date: Sat, 10 Oct 2026 14:39:57 -0700 To: mm-commits@vger.kernel.org,ljs@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: [to-be-updated] mm-drop-some-redundant-checks-around-hugetlb-vmas.patch removed from -mm tree Message-Id: <20261010213957.9E9E41F000FF@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: drop some redundant checks around hugetlb VMAs has been removed from the -mm tree. Its filename was mm-drop-some-redundant-checks-around-hugetlb-vmas.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: "Lorenzo Stoakes (ARM)" Subject: mm: drop some redundant checks around hugetlb VMAs Date: Sat, 03 Oct 2026 17:32:59 +0100 Adjust code which inadvertently perform redundant checks on hugetlb VMAs and clean them up: * hugetlb VMAs have VMA_DONTEXPAND_BIT set so a VMA_SPECIAL_FLAGS check suffices. (migrate_vma_setup() regains an explicit hugetlb test later in the series, once VMA_SPECIAL_FLAGS is removed.) * hugetlb VMAs unconditionally set vma->vm_ops, so they are never anonymous. * hugetlb VMAs do not set VMA_PFNMAP_BIT so checking for this is redundant. While we're here also drop a VM_BUG_ON() which the simplified check above makes unreachable, and use the new VMA flag API. No functional change intended. Link: https://lore.kernel.org/20261003-b4-mmap-prepare-vma-flag-sanify-v4-28-a1f052500fd7@kernel.org Signed-off-by: Lorenzo Stoakes (ARM) Signed-off-by: Andrew Morton Acked-by: Marc Zyngier Reviewed-by: Zi Yan Acked-by: David Hildenbrand (Arm) Cc: Liam R. Howlett Cc: Vlastimil Babka Cc: Jann Horn Cc: Pedro Falcato Cc: Mike Rapoport Cc: Suren Baghdasaryan Cc: Michal Hocko Cc: Jonathan Corbet Cc: Greg Kroah-Hartman Cc: Dennis Dalessandro Cc: Jason Gunthorpe Cc: Leon Romanovsky Cc: Paul Moore Cc: Stephen Smalley Cc: Jaroslav Kysela Cc: Takashi Iwai Cc: Alexei Starovoitov Cc: Daniel Borkmann Cc: Andrii Nakryiko Cc: Eduard Zingerman Cc: Kumar Kartikeya Dwivedi Cc: Baolin Wang Cc: Nico Pache Cc: Ryan Roberts Cc: Dev Jain Cc: Barry Song Cc: Lance Yang Cc: Usama Arif Cc: Kiryl Shutsemau Cc: Doug Gilbert Cc: James Bottomley Cc: Martin K. Petersen Cc: Simona Vetter Cc: Helge Deller Cc: Sebastian Reichel Cc: John Hubbard Cc: Peter Xu Cc: Masami Hiramatsu Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: Arnaldo Carvalho de Melo Cc: Namhyung Kim Cc: Mark Rutland Cc: Rik van Riel Cc: Harry Yoo Cc: Juri Lelli Cc: Vincent Guittot Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Will Deacon Cc: Aneesh Kumar K.V Cc: Nicholas Piggin Cc: Arnd Bergmann Cc: Muchun Song Cc: Oscar Salvador Cc: Matthew Wilcox (Oracle) Cc: Jan Kara Cc: Oliver Upton Cc: Catalin Marinas Cc: Madhavan Srinivasan Cc: Anup Patel Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: Christian Borntraeger Cc: Janosch Frank Cc: Claudio Imbrenda Cc: Alexander Gordeev Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Vasily Gorbik Cc: David S. Miller Cc: Andreas Larsson Cc: Al Viro Cc: Christian Brauner Cc: Matthew Brost Cc: Joshua Hahn Cc: Rakie Kim Cc: Byungchul Park Cc: Gregory Price Cc: Ying Huang Cc: Alistair Popple Cc: Chris Li Cc: Kairui Song Cc: Kemeng Shi Cc: Nhat Pham Cc: Baoquan He Cc: Youngjun Park Cc: Johannes Weiner Cc: Qi Zheng Cc: Shakeel Butt Cc: Axel Rasmussen Cc: Yuanchu Xie Cc: Wei Xu Cc: Chengming Zhou Cc: Michal Hocko Cc: Miklos Szeredi Cc: Xu Xin --- drivers/gpu/drm/drm_gpusvm.c | 3 +-- mm/migrate_device.c | 4 ++-- 2 files changed, 3 insertions(+), 4 deletions(-) --- a/drivers/gpu/drm/drm_gpusvm.c~mm-drop-some-redundant-checks-around-hugetlb-vmas +++ a/drivers/gpu/drm/drm_gpusvm.c @@ -1141,8 +1141,7 @@ drm_gpusvm_range_find_or_insert(struct d * limitations. If/when migrate_vma_* add more support, this logic will * have to change. */ - migrate_devmem = ctx->devmem_possible && - vma_is_anonymous(vas) && !vma_is_hugetlb(vas); + migrate_devmem = ctx->devmem_possible && vma_is_anonymous(vas); chunk_size = drm_gpusvm_range_chunk_size(gpusvm, notifier, vas, fault_addr, gpuva_start, --- a/mm/migrate_device.c~mm-drop-some-redundant-checks-around-hugetlb-vmas +++ a/mm/migrate_device.c @@ -743,8 +743,8 @@ int migrate_vma_setup(struct migrate_vma args->start &= PAGE_MASK; args->end &= PAGE_MASK; - if (!args->vma || vma_is_hugetlb(args->vma) || - (args->vma->vm_flags & VM_SPECIAL) || vma_is_dax(args->vma)) + if (!args->vma || vma_test_any_mask(args->vma, VMA_SPECIAL_FLAGS) || + vma_is_dax(args->vma)) return -EINVAL; if (nr_pages <= 0) return -EINVAL; _ Patches currently in -mm which might be from ljs@kernel.org are 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