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2b65a42a08
mm/internal.h becomes more and more bloated. Move declarations related to SPARSE and SPARSE_VMEMMAP memory models to a new mm/sparse.h header. No functional changes. Link: https://lore.kernel.org/20260709-internal-h-v2-2-695631425968@kernel.org Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Acked-by: Muchun Song <muchun.song@linux.dev> Acked-by: Vlastimil Babka (SUSE) <vbabka@kernel.org> Acked-by: David Hildenbrand (Arm) <david@kernel.org> Acked-by: Lorenzo Stoakes <ljs@kernel.org> Acked-by: Pratyush Yadav <pratyush@kernel.org> Acked-by: SJ Park <sj@kernel.org> Cc: Alexander Graf <graf@amazon.com> Cc: Alexander Potapenko <glider@google.com> Cc: Brendan Jackman <jackmanb@google.com> Cc: Brendan Jackman <brendan.jackman@linux.dev> Cc: Dennis Zhou <dennis@kernel.org> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Liam R. Howlett <liam@infradead.org> Cc: Marco Elver <elver@google.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Pasha Tatashin <pasha.tatashin@soleen.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Tejun Heo <tj@kernel.org> Cc: "Uladzislau Rezki (Sony)" <urezki@gmail.com> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* sparse.h:
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*
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* mm/ internal sparse and sparse-vmemmap declarations
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*/
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#ifndef __MM_SPARSE_H
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#define __MM_SPARSE_H
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#include <linux/mmzone.h>
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/*
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* mm/sparse.c
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*/
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#ifdef CONFIG_SPARSEMEM
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void sparse_init(void);
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int sparse_index_init(unsigned long section_nr, int nid);
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static inline void sparse_init_one_section(struct mem_section *ms,
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unsigned long pnum, struct page *mem_map,
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struct mem_section_usage *usage, unsigned long flags)
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{
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unsigned long coded_mem_map;
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BUILD_BUG_ON(SECTION_MAP_LAST_BIT > PFN_SECTION_SHIFT);
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/*
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* We encode the start PFN of the section into the mem_map such that
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* page_to_pfn() on !CONFIG_SPARSEMEM_VMEMMAP can simply subtract it
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* from the page pointer to obtain the PFN.
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*/
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coded_mem_map = (unsigned long)(mem_map - section_nr_to_pfn(pnum));
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VM_WARN_ON_ONCE(coded_mem_map & ~SECTION_MAP_MASK);
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ms->section_mem_map &= ~SECTION_MAP_MASK;
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ms->section_mem_map |= coded_mem_map;
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ms->section_mem_map |= flags | SECTION_HAS_MEM_MAP;
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ms->usage = usage;
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}
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static inline void __section_mark_present(struct mem_section *ms,
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unsigned long section_nr)
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{
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if (section_nr > __highest_present_section_nr)
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__highest_present_section_nr = section_nr;
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ms->section_mem_map |= SECTION_MARKED_PRESENT;
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}
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#else
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static inline void sparse_init(void) {}
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#endif /* CONFIG_SPARSEMEM */
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/*
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* mm/sparse-vmemmap.c
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*/
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#ifdef CONFIG_SPARSEMEM_VMEMMAP
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void sparse_init_subsection_map(void);
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#else
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static inline void sparse_init_subsection_map(void) {}
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#endif /* CONFIG_SPARSEMEM_VMEMMAP */
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#endif /* __MM_SPARSE_H */
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