xref: /linux-6.15/include/linux/numa.h (revision bbf62599)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_NUMA_H
3 #define _LINUX_NUMA_H
4 #include <linux/types.h>
5 
6 #ifdef CONFIG_NODES_SHIFT
7 #define NODES_SHIFT     CONFIG_NODES_SHIFT
8 #else
9 #define NODES_SHIFT     0
10 #endif
11 
12 #define MAX_NUMNODES    (1 << NODES_SHIFT)
13 
14 #define	NUMA_NO_NODE	(-1)
15 
16 /* optionally keep NUMA memory info available post init */
17 #ifdef CONFIG_NUMA_KEEP_MEMINFO
18 #define __initdata_or_meminfo
19 #else
20 #define __initdata_or_meminfo __initdata
21 #endif
22 
23 #ifdef CONFIG_NUMA
24 /* Generic implementation available */
25 int numa_map_to_online_node(int node);
26 #else
27 static inline int numa_map_to_online_node(int node)
28 {
29 	return NUMA_NO_NODE;
30 }
31 #endif
32 
33 #endif /* _LINUX_NUMA_H */
34