linux-kernel - [PATCH v3 0/3] Generalize vmemmap_populate

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Message-ID: <20251218174749.45965-1-pilgrimtao@gmail.com>
Date: Fri, 19 Dec 2025 01:47:46 +0800
From: chengkaitao <pilgrimtao@...il.com>
To: davem@...emloft.net,
	andreas@...sler.com,
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Cc: kevin.brodsky@....com,
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	chengkaitao <pilgrimtao@...il.com>
Subject: [PATCH v3 0/3] Generalize vmemmap_populate_hugepages to sparc

Sparc implement vmemmap_populate using vmemmap_populate_hugepages
to streamline the code. Another benefit is that it allows us to
eliminate the external declarations of vmemmap_p?d_populate
functions and convert them to static functions.

Since vmemmap_populate_hugepages may fallback to vmemmap_populate-
_basepages, which differs from sparc's original implementation.
During the v1 discussion with Mike Rapoport, sparc uses base pages
in the kernel page tables, so it should be able to use them in
vmemmap as well. Consequently, no additional special handling is
required.

Remove unnecessary whitespace from sparc.

Changes in v3:
- Allow sparc to fallback to vmemmap_populate_basepages
- Convert vmemmap_p?d_populate() to static functions
- Split the v1 patch

Changes in v2:
- Revert the whitespace deletions
- Change vmemmap_false_pmd to vmemmap_pte_fallback_allowed

Link to V1:
https://lore.kernel.org/all/20251217120858.18713-1-pilgrimtao@gmail.com/

Chengkaitao (3):
  sparc: Use vmemmap_populate_hugepages for vmemmap_populate
  mm: Convert vmemmap_p?d_populate() to static functions
  sparc: Remove unnecessary whitespace

 arch/sparc/mm/fault_64.c   |  4 +--
 arch/sparc/mm/hypersparc.S |  4 +--
 arch/sparc/mm/init_64.c    | 53 ++++++++++++--------------------------
 arch/sparc/mm/io-unit.c    | 12 ++++-----
 arch/sparc/mm/iommu.c      |  2 +-
 arch/sparc/mm/swift.S      |  2 +-
 arch/sparc/mm/ultra.S      |  4 +--
 include/linux/mm.h         |  7 -----
 mm/sparse-vmemmap.c        | 10 +++----
 9 files changed, 36 insertions(+), 62 deletions(-)

-- 
2.50.1 (Apple Git-155)