linux-imx
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committed b24413180f5static inline void pcpu_stats_area_alloc(struct pcpu_chunk *chunk, size_t size)/* SPDX-License-Identifier: GPL-2.0 *//* * pcpu_block_md is the metadata block struct. * Each chunk's bitmap is split into a number of full blocks. * All units are in terms of bits. */struct pcpu_block_md { int contig_hint; /* contig hint for block */ int contig_hint_start; /* block relative starting position of the contig hint */ int left_free; /* size of free space along the left side of the block */ int right_free; /* size of free space along the right side of the block */ int first_free; /* block position of first free */};struct pcpu_chunk { int nr_alloc; /* # of allocations */ size_t max_alloc_size; /* largest allocation size */ struct list_head list; /* linked to pcpu_slot lists */ int free_bytes; /* free bytes in the chunk */ int contig_bits; /* max contiguous size hint */ int contig_bits_start; /* contig_bits starting offset */ void *base_addr; /* base address of this chunk */ unsigned long *alloc_map; /* allocation map */ unsigned long *bound_map; /* boundary map */ struct pcpu_block_md *md_blocks; /* metadata blocks */ void *data; /* chunk data */ int first_bit; /* no free below this */ bool immutable; /* no [de]population allowed */ int start_offset; /* the overlap with the previous region to have a page aligned base_addr */ int end_offset; /* additional area required to have the region end page aligned */ int nr_pages; /* # of pages served by this chunk */ int nr_populated; /* # of populated pages */ int nr_empty_pop_pages; /* # of empty populated pages */ unsigned long populated[]; /* populated bitmap */};extern spinlock_t pcpu_lock;extern struct list_head *pcpu_slot;extern int pcpu_nr_slots;extern int pcpu_nr_empty_pop_pages;extern struct pcpu_chunk *pcpu_first_chunk;extern struct pcpu_chunk *pcpu_reserved_chunk;/** * pcpu_chunk_nr_blocks - converts nr_pages to # of md_blocks * @chunk: chunk of interest * * This conversion is from the number of physical pages that the chunk * serves to the number of bitmap blocks used. */static inline int pcpu_chunk_nr_blocks(struct pcpu_chunk *chunk){ return chunk->nr_pages * PAGE_SIZE / PCPU_BITMAP_BLOCK_SIZE;}/** * pcpu_nr_pages_to_map_bits - converts the pages to size of bitmap * @pages: number of physical pages * * This conversion is from physical pages to the number of bits * required in the bitmap. */static inline int pcpu_nr_pages_to_map_bits(int pages){ return pages * PAGE_SIZE / PCPU_MIN_ALLOC_SIZE;}/** * pcpu_chunk_map_bits - helper to convert nr_pages to size of bitmap * @chunk: chunk of interest