mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-30 22:03:17 +01:00
Frank van der Linden
243a75e236
If other mm code wants to use this function for early memmap inialization (on the platforms that have it), it should be made available properly, not just unconditionally in mm.h Make this function available for such cases. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Frank van der Linden <[email protected]> Cc: Alexander Gordeev <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Dan Carpenter <[email protected]> Cc: Dave Hansen <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Joao Martins <[email protected]> Cc: Johannes Weiner <[email protected]> Cc: Madhavan Srinivasan <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Muchun Song <[email protected]> Cc: Oscar Salvador <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Roman Gushchin (Cruise) <[email protected]> Cc: Usama Arif <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Yu Zhao <[email protected]> Cc: Zi Yan <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
95 lines
2.3 KiB
C
95 lines
2.3 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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/*
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* The reserve_bootmem_region sets the reserved flag on bootmem
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* pages.
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*/
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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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