[PATCH v5 0/2] mm/hugetlb: refactor sysfs/sysctl interfaces

[Hui Zhu <hui.zhu@linux.dev>]

From: Hui Zhu <zhuhui@kylinos.cn>

The hugetlb.c file has grown significantly and become difficult to
maintain. This patch series extracts the sysfs and sysctl interface
code into separate dedicated files to improve code organization.

The refactoring includes:
- Patch 1: Extract sysfs interface into mm/hugetlb_sysfs.c
- Patch 2: Extract sysctl interface into mm/hugetlb_sysctl.c

No functional changes are introduced in this series. The code is moved
as-is, with only minor formatting adjustments for code style
consistency. This should make future maintenance and enhancements to
the hugetlb subsystem easier.

Testing: The patch series has been compile-tested and maintains the
same functionality as the original code.

Changelog:
v5:
According to the comments of David Hildenbrand and Oscar Salvador,
move demote_free_hugetlb_folios and demote_pool_huge_page back to
hugetlb.c.
v4:
According to the comments of David Hildenbrand, add copyright of
hugetlb.c to hugetlb_internal.h, hugetlb_sysctl.c and hugetlb_sysfs.c.
v3:
According to the comments of SeongJae Park, updated MAINTAINERS to
add new files.
Removed the wrong copyright in hugetlb_internal.h.
v2:
According to the comments of David Hildenbrand, removed the wrong
copyright in the file headers.

Hui Zhu (2):
  mm/hugetlb: extract sysfs into hugetlb_sysfs.c
  mm/hugetlb: extract sysctl into hugetlb_sysctl.c

 MAINTAINERS           |   2 +
 mm/Makefile           |   2 +-
 mm/hugetlb.c          | 728 +-----------------------------------------
 mm/hugetlb_internal.h | 117 +++++++
 mm/hugetlb_sysctl.c   | 134 ++++++++
 mm/hugetlb_sysfs.c    | 502 +++++++++++++++++++++++++++++
 6 files changed, 767 insertions(+), 718 deletions(-)
 create mode 100644 mm/hugetlb_internal.h
 create mode 100644 mm/hugetlb_sysctl.c
 create mode 100644 mm/hugetlb_sysfs.c

-- 
2.43.0