arch/s390/kernel/numa.c
Source file repositories/reference/linux-study-clean/arch/s390/kernel/numa.c
File Facts
- System
- Linux kernel
- Corpus path
arch/s390/kernel/numa.c- Extension
.c- Size
- 627 bytes
- Lines
- 29
- Domain
- Architecture Layer
- Bucket
- arch/s390
- Inferred role
- Architecture Layer: implementation source
- Status
- source implementation candidate
Why This File Exists
CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
Dependency Surface
linux/kernel.hlinux/mmzone.hlinux/cpumask.hlinux/memblock.hlinux/node.hasm/numa.h
Detected Declarations
function numa_setup
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0
/*
* NUMA support for s390
*
* Implement NUMA core code.
*
* Copyright IBM Corp. 2015
*/
#include <linux/kernel.h>
#include <linux/mmzone.h>
#include <linux/cpumask.h>
#include <linux/memblock.h>
#include <linux/node.h>
#include <asm/numa.h>
void __init numa_setup(void)
{
int nid;
nodes_clear(node_possible_map);
node_set(0, node_possible_map);
node_set_online(0);
for (nid = 0; nid < MAX_NUMNODES; nid++)
NODE_DATA(nid) = memblock_alloc_or_panic(sizeof(pg_data_t), 8);
NODE_DATA(0)->node_spanned_pages = memblock_end_of_DRAM() >> PAGE_SHIFT;
NODE_DATA(0)->node_id = 0;
}
Annotation
- Immediate include surface: `linux/kernel.h`, `linux/mmzone.h`, `linux/cpumask.h`, `linux/memblock.h`, `linux/node.h`, `asm/numa.h`.
- Detected declarations: `function numa_setup`.
- Atlas domain: Architecture Layer / arch/s390.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.