arch/x86/include/asm/futex_robust.h

File Facts

System

Linux kernel

Corpus path

arch/x86/include/asm/futex_robust.h

Extension

.h

Size

525 bytes

Lines

20

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

• asm/ptrace.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef _ASM_X86_FUTEX_ROBUST_H
#define _ASM_X86_FUTEX_ROBUST_H

#include <asm/ptrace.h>

static __always_inline void __user *x86_futex_robust_unlock_get_pop(struct pt_regs *regs)
{
	/*
	 * If ZF is set then the cmpxchg succeeded and the pending op pointer
	 * needs to be cleared.
	 */
	return regs->flags & X86_EFLAGS_ZF ? (void __user *)regs->dx : NULL;
}

#define arch_futex_robust_unlock_get_pop(regs)	\
	x86_futex_robust_unlock_get_pop(regs)

#endif /* _ASM_X86_FUTEX_ROBUST_H */

Annotation

• Immediate include surface: `asm/ptrace.h`.
• 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.