arch/sparc/include/asm/atomic_32.h

File Facts

System

Linux kernel

Corpus path

arch/sparc/include/asm/atomic_32.h

Extension

.h

Size

2117 bytes

Lines

62

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.

Dependency Surface

• linux/types.h
• asm/cmpxchg.h
• asm/barrier.h
• asm-generic/atomic64.h

Detected Declarations

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

Annotated Snippet

#ifndef __ARCH_SPARC_ATOMIC__
#define __ARCH_SPARC_ATOMIC__

#include <linux/types.h>

#include <asm/cmpxchg.h>
#include <asm/barrier.h>
#include <asm-generic/atomic64.h>

int arch_atomic_add_return(int, atomic_t *);
#define arch_atomic_add_return arch_atomic_add_return

int arch_atomic_fetch_add(int, atomic_t *);
#define arch_atomic_fetch_add arch_atomic_fetch_add

int arch_atomic_fetch_and(int, atomic_t *);
#define arch_atomic_fetch_and arch_atomic_fetch_and

int arch_atomic_fetch_or(int, atomic_t *);
#define arch_atomic_fetch_or arch_atomic_fetch_or

int arch_atomic_fetch_xor(int, atomic_t *);
#define arch_atomic_fetch_xor arch_atomic_fetch_xor

int arch_atomic_cmpxchg(atomic_t *, int, int);
#define arch_atomic_cmpxchg arch_atomic_cmpxchg

int arch_atomic_xchg(atomic_t *, int);
#define arch_atomic_xchg arch_atomic_xchg

int arch_atomic_fetch_add_unless(atomic_t *, int, int);
#define arch_atomic_fetch_add_unless arch_atomic_fetch_add_unless

void arch_atomic_set(atomic_t *, int);

#define arch_atomic_set_release(v, i)	arch_atomic_set((v), (i))

#define arch_atomic_read(v)		READ_ONCE((v)->counter)

#define arch_atomic_add(i, v)	((void)arch_atomic_add_return( (int)(i), (v)))
#define arch_atomic_sub(i, v)	((void)arch_atomic_add_return(-(int)(i), (v)))

#define arch_atomic_and(i, v)	((void)arch_atomic_fetch_and((i), (v)))
#define arch_atomic_or(i, v)	((void)arch_atomic_fetch_or((i), (v)))
#define arch_atomic_xor(i, v)	((void)arch_atomic_fetch_xor((i), (v)))

#define arch_atomic_sub_return(i, v)	(arch_atomic_add_return(-(int)(i), (v)))
#define arch_atomic_fetch_sub(i, v)	(arch_atomic_fetch_add (-(int)(i), (v)))

#endif /* !(__ARCH_SPARC_ATOMIC__) */

Annotation

• Immediate include surface: `linux/types.h`, `asm/cmpxchg.h`, `asm/barrier.h`, `asm-generic/atomic64.h`.
• Atlas domain: Architecture Layer / arch/sparc.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.