67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
|
/* 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 = page->index;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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 */
|