arch/x86/kernel/cpu/rdrand.c
Source file repositories/reference/linux-study-clean/arch/x86/kernel/cpu/rdrand.c
File Facts
- System
- Linux kernel
- Corpus path
arch/x86/kernel/cpu/rdrand.c- Extension
.c- Size
- 1246 bytes
- Lines
- 51
- Domain
- Architecture Layer
- Bucket
- arch/x86
- 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/printk.hasm/processor.hasm/archrandom.hasm/sections.h
Detected Declarations
function Copyright
Annotated Snippet
if (!rdrand_long(&sample)) {
failure = true;
break;
}
changed += i && sample != prev;
prev = sample;
}
if (changed < MIN_CHANGE)
failure = true;
if (failure) {
clear_cpu_cap(c, X86_FEATURE_RDRAND);
clear_cpu_cap(c, X86_FEATURE_RDSEED);
pr_emerg("RDRAND is not reliable on this platform; disabling.\n");
}
}
Annotation
- Immediate include surface: `linux/printk.h`, `asm/processor.h`, `asm/archrandom.h`, `asm/sections.h`.
- Detected declarations: `function Copyright`.
- Atlas domain: Architecture Layer / arch/x86.
- 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.