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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato , David Rientjes , Shakeel Butt , "Matthew Wilcox (Oracle)" , Alice Ryhl , Madhavan Srinivasan , Michael Ellerman , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Jarkko Sakkinen , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Greg Kroah-Hartman , =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= , Todd Kjos , Christian Brauner , Carlos Llamas , Ian Abbott , H Hartley Sweeten , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Simona Vetter , Jason Gunthorpe , Leon Romanovsky , Dimitri Sivanich , Arnd Bergmann , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Peter Zijlstra , Arnaldo Carvalho de Melo , Namhyung Kim , Andy Lutomirski , Vincenzo Frascino , Eric Dumazet , Neal Cardwell , "David S. Miller" , David Ahern , Jakub Kicinski , Paolo Abeni , Miguel Ojeda , linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-sgx@vger.kernel.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, bpf@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-fsdevel@vger.kernel.org, netdev@vger.kernel.org, rust-for-linux@vger.kernel.org, x86@kernel.org Subject: [PATCH v1 16/16] mm/memory: support VM_MIXEDMAP in zap_special_vma_range() Date: Fri, 27 Feb 2026 21:08:47 +0100 Message-ID: <20260227200848.114019-17-david@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260227200848.114019-1-david@kernel.org> References: <20260227200848.114019-1-david@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 0E5ADC0007 X-Stat-Signature: e37gwskzxf9qubzpuug8e4nauq77tcuk X-Rspam-User: X-Rspamd-Server: rspam05 X-HE-Tag: 1772223212-47025 X-HE-Meta: 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 T5eOHt5S 0v+VzZDLnBkSyv8FO09ZDF52P4uReZTZy3rvWLFQVvVddTZeHjJm9eMpNo0UxKhxAXZgerwGcSBgJ3e7cVltFbL/uAf2ZIiiX/E4c3bWqFTlsApYuMWQVAfuJMYJFFLnxqMIqjT/wiSQebMVh9/OSMZNp4vafulKUhpa/Um4u5UB35QfcaAa3484L+3wabwOdYzT+VggpQ1d85dVXYAqjGwfnlaH7n5jgRx6XNqIZERDdVeROn0lJ4ccHLKN/636YumpdfGHI/tYBAEShA2lS6rkGM67iF5fWHeKcBGlyUX2lEA2lkGg1yd5lgg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: There is demand for also zapping page table entries by drivers in VM_MIXEDMAP VMAs[1]. Nothing really speaks against supporting VM_MIXEDMAP for driver use. We just don't want arbitrary drivers to zap in ordinary (non-special) VMAs. [1] https://lore.kernel.org/r/aYSKyr7StGpGKNqW@google.com Signed-off-by: David Hildenbrand (Arm) --- mm/memory.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/memory.c b/mm/memory.c index f3b7b7e16138..3fe30dc2f179 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -2239,13 +2239,13 @@ void zap_vma_range(struct vm_area_struct *vma, unsigned long address, * @size: number of bytes to zap * * This function does nothing when the provided address range is not fully - * contained in @vma, or when the @vma is not VM_PFNMAP. + * contained in @vma, or when the @vma is not VM_PFNMAP or VM_MIXEDMAP. */ void zap_special_vma_range(struct vm_area_struct *vma, unsigned long address, unsigned long size) { if (!range_in_vma(vma, address, address + size) || - !(vma->vm_flags & VM_PFNMAP)) + !(vma->vm_flags & (VM_PFNMAP | VM_MIXEDMAP))) return; zap_vma_range(vma, address, size); -- 2.43.0