[PATCH 04/30] mm: introduce and use vma_end_pgoff()
From: Lorenzo Stoakes <ljs@kernel.org>
Date: 2026-06-29 12:24:07
Also in:
damon, dri-devel, kvm, linux-arm-msm, linux-fsdevel, linux-iommu, linux-mm, linux-perf-users, linux-tegra, lkml, nvdimm
Subsystem:
memory management - core, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
We already have vma_last_pgoff() which retrieves the last page offset within a VMA. However, code often wishes to span a page offset range, which requires the exclusive end of this range. So provide this in vma_end_pgoff() and update vma_last_pgoff() to use this function. No functional change intended. Signed-off-by: Lorenzo Stoakes <ljs@kernel.org> --- include/linux/mm.h | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 2f00c75e66bd..e7ee315d5ba2 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h@@ -4298,6 +4298,23 @@ static inline pgoff_t vma_start_pgoff(const struct vm_area_struct *vma) return vma->vm_pgoff; } +/** + * vma_end_pgoff() - Get the page offset of the exclusive end of @vma + * @vma: The VMA whose end page offset is required. + * + * This returns the exclusive end page offset of @vma, which is useful for + * expressing page offset ranges. + * + * See the description of vma_start_pgoff() for a description of VMA page + * offsets. + * + * Returns: The exclusive end page offset of @vma. + */ +static inline pgoff_t vma_end_pgoff(const struct vm_area_struct *vma) +{ + return vma_start_pgoff(vma) + vma_pages(vma); +} + /** * vma_last_pgoff() - Get the page offset of the last page in @vma * @vma: The VMA whose last page offset is required.
@@ -4311,7 +4328,7 @@ static inline pgoff_t vma_start_pgoff(const struct vm_area_struct *vma) */ static inline pgoff_t vma_last_pgoff(const struct vm_area_struct *vma) { - return vma_start_pgoff(vma) + vma_pages(vma) - 1; + return vma_end_pgoff(vma) - 1; } static inline unsigned long vma_desc_size(const struct vm_area_desc *desc)
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2.54.0