| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __LINUX_BOOTMEM_INFO_H |
| #define __LINUX_BOOTMEM_INFO_H |
| |
| #include <linux/mm.h> |
| |
| /* |
| * Types for free bootmem stored in page->lru.next. These have to be in |
| * some random range in unsigned long space for debugging purposes. |
| */ |
| enum { |
| MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE = 12, |
| SECTION_INFO = MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE, |
| MIX_SECTION_INFO, |
| NODE_INFO, |
| MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO, |
| }; |
| |
| #ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE |
| void __init register_page_bootmem_info_node(struct pglist_data *pgdat); |
| |
| void get_page_bootmem(unsigned long info, struct page *page, |
| unsigned long type); |
| void put_page_bootmem(struct page *page); |
| |
| /* |
| * Any memory allocated via the memblock allocator and not via the |
| * buddy will be marked reserved already in the memmap. For those |
| * pages, we can call this function to free it to buddy allocator. |
| */ |
| static inline void free_bootmem_page(struct page *page) |
| { |
| unsigned long magic = (unsigned long)page->freelist; |
| |
| /* |
| * The reserve_bootmem_region sets the reserved flag on bootmem |
| * pages. |
| */ |
| VM_BUG_ON_PAGE(page_ref_count(page) != 2, page); |
| |
| if (magic == SECTION_INFO || magic == MIX_SECTION_INFO) |
| put_page_bootmem(page); |
| else |
| VM_BUG_ON_PAGE(1, page); |
| } |
| #else |
| static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
| { |
| } |
| |
| static inline void put_page_bootmem(struct page *page) |
| { |
| } |
| |
| static inline void get_page_bootmem(unsigned long info, struct page *page, |
| unsigned long type) |
| { |
| } |
| |
| static inline void free_bootmem_page(struct page *page) |
| { |
| free_reserved_page(page); |
| } |
| #endif |
| |
| #endif /* __LINUX_BOOTMEM_INFO_H */ |