arch/xtensa/include/asm/current.h

File Facts

System

Linux kernel

Corpus path

arch/xtensa/include/asm/current.h

Extension

.h

Size

750 bytes

Lines

41

Domain

Architecture Layer

Bucket

arch/xtensa

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/thread_info.h
• linux/thread_info.h

Detected Declarations

• struct task_struct

Annotated Snippet

#ifndef _XTENSA_CURRENT_H
#define _XTENSA_CURRENT_H

#include <asm/thread_info.h>

#ifndef __ASSEMBLER__

#include <linux/thread_info.h>

struct task_struct;

static __always_inline struct task_struct *get_current(void)
{
	return current_thread_info()->task;
}

#define current get_current()

register unsigned long current_stack_pointer __asm__("a1");

#else

#define GET_CURRENT(reg,sp)		\
	GET_THREAD_INFO(reg,sp);	\
	l32i reg, reg, TI_TASK		\

#endif


#endif /* XTENSA_CURRENT_H */

Annotation

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