arch/xtensa/include/uapi/asm/sembuf.h

File Facts

System

Linux kernel

Corpus path

arch/xtensa/include/uapi/asm/sembuf.h

Extension

.h

Size

1246 bytes

Lines

46

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/byteorder.h
• asm/ipcbuf.h

Detected Declarations

• struct semid64_ds

Annotated Snippet

struct semid64_ds {
	struct ipc64_perm sem_perm;		/* permissions .. see ipc.h */
#ifdef __XTENSA_EL__
	unsigned long	sem_otime;		/* last semop time */
	unsigned long	sem_otime_high;
	unsigned long	sem_ctime;		/* last change time */
	unsigned long	sem_ctime_high;
#else
	unsigned long	sem_otime_high;
	unsigned long	sem_otime;		/* last semop time */
	unsigned long	sem_ctime_high;
	unsigned long	sem_ctime;		/* last change time */
#endif
	unsigned long	sem_nsems;		/* no. of semaphores in array */
	unsigned long	__unused3;
	unsigned long	__unused4;
};

#endif /* __ASM_XTENSA_SEMBUF_H */

Annotation

• Immediate include surface: `asm/byteorder.h`, `asm/ipcbuf.h`.
• Detected declarations: `struct semid64_ds`.
• 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.