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Patch series "mm/hugetlb: refactor sysfs/sysctl interfaces", v5. hugetlb.c 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. This patch (of 2): Currently, hugetlb.c contains both core management logic and sysfs interface implementations, making it difficult to maintain. This patch extracts the sysfs-related code into a dedicated file to improve code organization. The following components are moved to mm/hugetlb_sysfs.c: - sysfs attribute definitions and handlers - sysfs kobject management functions - NUMA per-node hstate attribute registration Several inline helper functions and macros are moved to mm/hugetlb_internal.h: - hstate_is_gigantic_no_runtime() - next_node_allowed() - get_valid_node_allowed() - hstate_next_node_to_alloc() - hstate_next_node_to_free() - for_each_node_mask_to_alloc/to_free macros To support code sharing, these functions are changed from static to exported symbols: - remove_hugetlb_folio() - add_hugetlb_folio() - init_new_hugetlb_folio() - prep_and_add_allocated_folios() - demote_pool_huge_page() - __nr_hugepages_store_common() The Makefile is updated to compile hugetlb_sysfs.o when CONFIG_HUGETLBFS is enabled. This maintains all existing functionality while improving maintainability by separating concerns. MAINTAINERS is updated to add new file hugetlb_sysfs.c. Link: https://lkml.kernel.org/r/cover.1762398359.git.zhuhui@kylinos.cn Link: https://lkml.kernel.org/r/656a03dff7e2bb20e24e841ede81fdca01d21410.1762398359.git.zhuhui@kylinos.cn Signed-off-by: Geliang Tang <geliang@kernel.org> Signed-off-by: Hui Zhu <zhuhui@kylinos.cn> Cc: David Hildenbrand <david@redhat.com> Cc: Muchun Song <muchun.song@linux.dev> Cc: Oscar Salvador <osalvador@suse.de> Cc: SeongJae Park <sj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.