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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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16d79f2a4f
Introduce the new helper nearest_node_nodemask() to find the closest node in a specified nodemask from a given starting node. Returns MAX_NUMNODES if no node is found. Suggested-by: Yury Norov [NVIDIA] <yury.norov@gmail.com> Signed-off-by: Andrea Righi <arighi@nvidia.com> Acked-by: Yury Norov [NVIDIA] <yury.norov@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_NUMA_H
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#define _LINUX_NUMA_H
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/nodemask.h>
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#define NUMA_NO_MEMBLK (-1)
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static inline bool numa_valid_node(int nid)
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{
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return nid >= 0 && nid < MAX_NUMNODES;
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}
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/* optionally keep NUMA memory info available post init */
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#ifdef CONFIG_NUMA_KEEP_MEMINFO
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#define __initdata_or_meminfo
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#else
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#define __initdata_or_meminfo __initdata
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#endif
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#ifdef CONFIG_NUMA
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#include <asm/sparsemem.h>
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extern struct pglist_data *node_data[];
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#define NODE_DATA(nid) (node_data[nid])
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void __init alloc_node_data(int nid);
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void __init alloc_offline_node_data(int nid);
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/* Generic implementation available */
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int numa_nearest_node(int node, unsigned int state);
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int nearest_node_nodemask(int node, nodemask_t *mask);
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#ifndef memory_add_physaddr_to_nid
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int memory_add_physaddr_to_nid(u64 start);
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#endif
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#ifndef phys_to_target_node
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int phys_to_target_node(u64 start);
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#endif
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int numa_fill_memblks(u64 start, u64 end);
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#else /* !CONFIG_NUMA */
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static inline int numa_nearest_node(int node, unsigned int state)
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{
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return NUMA_NO_NODE;
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}
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static inline int nearest_node_nodemask(int node, nodemask_t *mask)
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{
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return NUMA_NO_NODE;
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}
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static inline int memory_add_physaddr_to_nid(u64 start)
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{
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return 0;
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}
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static inline int phys_to_target_node(u64 start)
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{
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return 0;
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}
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static inline void alloc_offline_node_data(int nid) {}
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#endif
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#define numa_map_to_online_node(node) numa_nearest_node(node, N_ONLINE)
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#ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP
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extern const struct attribute_group arch_node_dev_group;
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#endif
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#endif /* _LINUX_NUMA_H */
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