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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-05-14 21:38:46 +02:00
Mike Rapoport (Microsoft)
8b7b85384f
reserve_bootmem_region() is only called from memmap_init_reserved_pages() and it was in mm/mm_init.c because of its dependecies on static init_deferred_page(). Since init_deferred_page() is not static anymore, move reserve_bootmem_region(), rename it to memmap_init_reserved_range() and make it static. Update the comment describing it to better reflect what the function does and drop bogus comment about reserved pages in free_bootmem_page(). Update memblock test stubs to reflect the core changes. Reviewed-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org> Reviewed-by: David Hildenbrand (Arm) <david@kernel.org> Link: https://patch.msgid.link/20260323072042.3651061-1-rppt@kernel.org Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_BOOTMEM_INFO_H
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#define __LINUX_BOOTMEM_INFO_H
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#include <linux/mm.h>
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#include <linux/kmemleak.h>
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/*
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* Types for free bootmem stored in the low bits of page->private.
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*/
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enum bootmem_type {
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MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE = 1,
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SECTION_INFO = MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE,
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MIX_SECTION_INFO,
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NODE_INFO,
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MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO,
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};
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#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE
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void __init register_page_bootmem_info_node(struct pglist_data *pgdat);
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void register_page_bootmem_memmap(unsigned long section_nr, struct page *map,
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unsigned long nr_pages);
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void get_page_bootmem(unsigned long info, struct page *page,
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enum bootmem_type type);
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void put_page_bootmem(struct page *page);
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static inline enum bootmem_type bootmem_type(const struct page *page)
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{
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return (unsigned long)page->private & 0xf;
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}
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static inline unsigned long bootmem_info(const struct page *page)
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{
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return (unsigned long)page->private >> 4;
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}
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/*
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* Any memory allocated via the memblock allocator and not via the
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* buddy will be marked reserved already in the memmap. For those
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* pages, we can call this function to free it to buddy allocator.
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*/
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static inline void free_bootmem_page(struct page *page)
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{
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enum bootmem_type type = bootmem_type(page);
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VM_BUG_ON_PAGE(page_ref_count(page) != 2, page);
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if (type == SECTION_INFO || type == MIX_SECTION_INFO)
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put_page_bootmem(page);
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else
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VM_BUG_ON_PAGE(1, page);
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}
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#else
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static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
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{
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}
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static inline void register_page_bootmem_memmap(unsigned long section_nr,
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struct page *map, unsigned long nr_pages)
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{
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}
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static inline void put_page_bootmem(struct page *page)
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{
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}
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static inline enum bootmem_type bootmem_type(const struct page *page)
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{
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return SECTION_INFO;
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}
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static inline unsigned long bootmem_info(const struct page *page)
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{
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return 0;
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}
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static inline void get_page_bootmem(unsigned long info, struct page *page,
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enum bootmem_type type)
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{
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}
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static inline void free_bootmem_page(struct page *page)
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{
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kmemleak_free_part_phys(PFN_PHYS(page_to_pfn(page)), PAGE_SIZE);
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free_reserved_page(page);
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}
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#endif
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#endif /* __LINUX_BOOTMEM_INFO_H */
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