mm/vma: introduce and use vmg_pages(), vmg_[start, end]_pgoff()

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In the VMA logic we often need to determine the number of pages in the
specified merge range, as well as the start and end page offsets of that
range.

Introduce and use helpers for these purposes.

No functional change intended.

Link: https://lore.kernel.org/20260710-b4-pre-scalable-cow-v2-13-2a5aa403d977@kernel.org
Signed-off-by: Lorenzo Stoakes <ljs@kernel.org>
Reviewed-by: Pedro Falcato <pfalcato@suse.de>
Reviewed-by: Gregory Price <gourry@gourry.net>
Reviewed-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Cc: Ackerley Tng <ackerleytng@google.com>
Cc: David Hildenbrand (Arm) <david@kernel.org>
Cc: Kai Huang <kai.huang@intel.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: SJ Park <sj@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Liam R. Howlett (Oracle) <liam@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

...

This commit is contained in:

Lorenzo Stoakes 2026-07-10 21:16:54 +01:00 • committed by Andrew Morton

parent 271f11c7a5

commit 8802c4069e

2 changed files with 21 additions and 7 deletions

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mm/vma.c

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mm/vma.h

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