arch/sparc/include/asm/compat.h

File Facts

System

Linux kernel

Corpus path

arch/sparc/include/asm/compat.h

Extension

.h

Size

3390 bytes

Lines

161

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/types.h
• asm-generic/compat.h

Detected Declarations

• struct compat_stat
• struct compat_stat64
• struct compat_ipc64_perm
• struct compat_semid64_ds
• struct compat_msqid64_ds
• struct compat_shmid64_ds
• function is_compat_task
• function in_compat_syscall

Annotated Snippet

struct compat_stat {
	compat_dev_t	st_dev;
	compat_ino_t	st_ino;
	compat_mode_t	st_mode;
	compat_nlink_t	st_nlink;
	__compat_uid_t	st_uid;
	__compat_gid_t	st_gid;
	compat_dev_t	st_rdev;
	compat_off_t	st_size;
	old_time32_t	st_atime;
	compat_ulong_t	st_atime_nsec;
	old_time32_t	st_mtime;
	compat_ulong_t	st_mtime_nsec;
	old_time32_t	st_ctime;
	compat_ulong_t	st_ctime_nsec;
	compat_off_t	st_blksize;
	compat_off_t	st_blocks;
	u32		__unused4[2];
};

struct compat_stat64 {
	unsigned long long	st_dev;

	unsigned long long	st_ino;

	unsigned int	st_mode;
	unsigned int	st_nlink;

	unsigned int	st_uid;
	unsigned int	st_gid;

	unsigned long long	st_rdev;

	unsigned char	__pad3[8];

	long long	st_size;
	unsigned int	st_blksize;

	unsigned char	__pad4[8];
	unsigned int	st_blocks;

	unsigned int	st_atime;
	unsigned int	st_atime_nsec;

	unsigned int	st_mtime;
	unsigned int	st_mtime_nsec;

	unsigned int	st_ctime;
	unsigned int	st_ctime_nsec;

	unsigned int	__unused4;
	unsigned int	__unused5;
};

#define __ARCH_COMPAT_FLOCK_PAD		short __unused;

struct compat_ipc64_perm {
	compat_key_t key;
	__compat_uid32_t uid;
	__compat_gid32_t gid;
	__compat_uid32_t cuid;
	__compat_gid32_t cgid;
	unsigned short __pad1;
	compat_mode_t mode;
	unsigned short __pad2;
	unsigned short seq;
	unsigned long __unused1;	/* yes they really are 64bit pads */
	unsigned long __unused2;
};

struct compat_semid64_ds {
	struct compat_ipc64_perm sem_perm;
	unsigned int	sem_otime_high;
	unsigned int	sem_otime;
	unsigned int	sem_ctime_high;
	unsigned int	sem_ctime;
	u32		sem_nsems;
	u32		__unused1;
	u32		__unused2;
};

struct compat_msqid64_ds {
	struct compat_ipc64_perm msg_perm;
	unsigned int	msg_stime_high;
	unsigned int	msg_stime;
	unsigned int	msg_rtime_high;
	unsigned int	msg_rtime;
	unsigned int	msg_ctime_high;
	unsigned int	msg_ctime;
	unsigned int	msg_cbytes;

Annotation

• Immediate include surface: `linux/types.h`, `asm-generic/compat.h`.
• Detected declarations: `struct compat_stat`, `struct compat_stat64`, `struct compat_ipc64_perm`, `struct compat_semid64_ds`, `struct compat_msqid64_ds`, `struct compat_shmid64_ds`, `function is_compat_task`, `function in_compat_syscall`.
• 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.