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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_NUMA_H
#define _LINUX_NUMA_H
#include <linux/types.h>
#ifdef CONFIG_NODES_SHIFT
#define NODES_SHIFT CONFIG_NODES_SHIFT
#else
#define NODES_SHIFT 0
#endif
#define MAX_NUMNODES (1 << NODES_SHIFT)
#define NUMA_NO_NODE (-1)
/* optionally keep NUMA memory info available post init */
#ifdef CONFIG_NUMA_KEEP_MEMINFO
#define __initdata_or_meminfo
#else
#define __initdata_or_meminfo __initdata
#endif
#ifdef CONFIG_NUMA
/* Generic implementation available */
int numa_map_to_online_node(int node);
/*
* Optional architecture specific implementation, users need a "depends
* on $ARCH"
*/
int phys_to_target_node(phys_addr_t addr);
#else
static inline int numa_map_to_online_node(int node)
{
return NUMA_NO_NODE;
}
static inline int phys_to_target_node(phys_addr_t addr)
{
return NUMA_NO_NODE;
}
#endif
#ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP
extern const struct attribute_group arch_node_dev_group;
#endif
#endif /* _LINUX_NUMA_H */