Re: [PATCH v5 38/38] mm/huge_memory: remove vma_is_special_huge()
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From: "David Hildenbrand (Arm)" <david@kernel.org>
Date: 2026-10-12 18:54:03
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bpf, dri-devel, fuse-devel, kvm, kvm-riscv, kvmarm, linux-arch, linux-doc, linux-fbdev, linux-fsdevel, linux-mm, linux-perf-users, linux-rdma, linux-riscv, linux-s390, linux-scsi, linux-sound, linux-trace-kernel, linux-usb, lkml, selinux, sparclinux
On 10/9/26 20:04, Lorenzo Stoakes (ARM) wrote:
vma_is_special_huge() tests whether either the VMA_PFNMAP_BIT or VMA_MIXEDMAP_BIT is set (i.e. whether the VMA is not mm-managed), but with a DAX carve-out. DAX however no longer sets VMA_MIXEDMAP_BIT, so this carve-out is no longer required. Therefore test for !vma_is_mm_managed() instead and also drop the VMA_IO_BIT check, as it is now redundant since it is enforced that mm-managed mappings may not set VMA_IO_BIT. This also eliminates another overloaded use of 'special' within mm. No functional change intended. Acked-by: Zi Yan <ziy@nvidia.com> Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org> ---
Acked-by: David Hildenbrand (Arm) <david@kernel.org> -- Cheers, David