arch/sparc/include/asm/current.h

File Facts

System

Linux kernel

Corpus path

arch/sparc/include/asm/current.h

Extension

.h

Size

991 bytes

Lines

36

Domain

Architecture Layer

Bucket

arch/sparc

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/thread_info.h

Detected Declarations

• struct task_struct

Annotated Snippet

#ifndef _SPARC_CURRENT_H
#define _SPARC_CURRENT_H

#include <linux/thread_info.h>

#ifdef CONFIG_SPARC64
register struct task_struct *current asm("g4");
#endif

#ifdef CONFIG_SPARC32
/* We might want to consider using %g4 like sparc64 to shave a few cycles.
 *
 * Two stage process (inline + #define) for type-checking.
 * We also obfuscate get_current() to check if anyone used that by mistake.
 */
struct task_struct;
static inline struct task_struct *__get_current(void)
{
	return current_thread_info()->task;
}
#define current __get_current()
#endif

#endif /* !(_SPARC_CURRENT_H) */

Annotation

• Immediate include surface: `linux/thread_info.h`.
• Detected declarations: `struct task_struct`.
• Atlas domain: Architecture Layer / arch/sparc.
• 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.