39 lines · c
1/* SPDX-License-Identifier: GPL-2.0-or-later */2 3#ifndef _LINUX_MMZONE_H4#define _LINUX_MMZONE_H5 6#include <linux/atomic.h>7 8struct pglist_data *first_online_pgdat(void);9struct pglist_data *next_online_pgdat(struct pglist_data *pgdat);10 11#define for_each_online_pgdat(pgdat) \12 for (pgdat = first_online_pgdat(); \13 pgdat; \14 pgdat = next_online_pgdat(pgdat))15 16enum zone_type {17 __MAX_NR_ZONES18};19 20#define MAX_NR_ZONES __MAX_NR_ZONES21#define MAX_PAGE_ORDER 1022#define MAX_ORDER_NR_PAGES (1 << MAX_PAGE_ORDER)23 24#define pageblock_order MAX_PAGE_ORDER25#define pageblock_nr_pages BIT(pageblock_order)26#define pageblock_align(pfn) ALIGN((pfn), pageblock_nr_pages)27#define pageblock_start_pfn(pfn) ALIGN_DOWN((pfn), pageblock_nr_pages)28 29struct zone {30 atomic_long_t managed_pages;31};32 33typedef struct pglist_data {34 struct zone node_zones[MAX_NR_ZONES];35 36} pg_data_t;37 38#endif /* _LINUX_MMZONE_H */39