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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 04/16] mm/memory: simplify calculation in unmap_mapping_range_tree() Date: Fri, 27 Feb 2026 21:08:35 +0100 Message-ID: <20260227200848.114019-5-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> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Let's simplify the calculation a bit further to make it easier to get, reusing vma_last_pgoff() which we move from interval_tree.c to mm.h. Signed-off-by: David Hildenbrand (Arm) --- include/linux/mm.h | 5 +++++ mm/interval_tree.c | 5 ----- mm/memory.c | 12 +++++------- 3 files changed, 10 insertions(+), 12 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index a8138ff7d1fa..d3ef586ee1c0 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -4000,6 +4000,11 @@ static inline unsigned long vma_pages(const struct vm_area_struct *vma) return (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; } +static inline unsigned long vma_last_pgoff(struct vm_area_struct *vma) +{ + return vma->vm_pgoff + vma_pages(vma) - 1; +} + static inline unsigned long vma_desc_size(const struct vm_area_desc *desc) { return desc->end - desc->start; diff --git a/mm/interval_tree.c b/mm/interval_tree.c index 32e390c42c53..32bcfbfcf15f 100644 --- a/mm/interval_tree.c +++ b/mm/interval_tree.c @@ -15,11 +15,6 @@ static inline unsigned long vma_start_pgoff(struct vm_area_struct *v) return v->vm_pgoff; } -static inline unsigned long vma_last_pgoff(struct vm_area_struct *v) -{ - return v->vm_pgoff + vma_pages(v) - 1; -} - INTERVAL_TREE_DEFINE(struct vm_area_struct, shared.rb, unsigned long, shared.rb_subtree_last, vma_start_pgoff, vma_last_pgoff, /* empty */, vma_interval_tree) diff --git a/mm/memory.c b/mm/memory.c index 5c47309331f5..e4154f03feac 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -4227,17 +4227,15 @@ static inline void unmap_mapping_range_tree(struct rb_root_cached *root, struct zap_details *details) { struct vm_area_struct *vma; - pgoff_t vba, vea, zba, zea; unsigned long start, size; struct mmu_gather tlb; vma_interval_tree_foreach(vma, root, first_index, last_index) { - vba = vma->vm_pgoff; - vea = vba + vma_pages(vma) - 1; - zba = max(first_index, vba); - zea = min(last_index, vea); - start = ((zba - vba) << PAGE_SHIFT) + vma->vm_start; - size = (zea - zba + 1) << PAGE_SHIFT; + const pgoff_t start_idx = max(first_index, vma->vm_pgoff); + const pgoff_t end_idx = min(last_index, vma_last_pgoff(vma)) + 1; + + start = vma->vm_start + ((start_idx - vma->vm_pgoff) << PAGE_SHIFT); + size = (end_idx - start_idx) << PAGE_SHIFT; tlb_gather_mmu(&tlb, vma->vm_mm); zap_page_range_single_batched(&tlb, vma, start, size, details); -- 2.43.0