arch/arm/include/asm/swab.h

File Facts

System

Linux kernel

Corpus path

arch/arm/include/asm/swab.h

Extension

.h

Size

1005 bytes

Lines

40

Domain

Architecture Layer

Bucket

arch/arm

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.

Dependency Surface

• uapi/asm/swab.h

Detected Declarations

• function accesses
• function __arch_swab32

Annotated Snippet

#ifndef __ASM_ARM_SWAB_H
#define __ASM_ARM_SWAB_H

#include <uapi/asm/swab.h>

#if __LINUX_ARM_ARCH__ >= 6

static inline __attribute_const__ __u32 __arch_swahb32(__u32 x)
{
	__asm__ ("rev16 %0, %1" : "=r" (x) : "r" (x));
	return x;
}
#define __arch_swahb32 __arch_swahb32
#define __arch_swab16(x) ((__u16)__arch_swahb32(x))

static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
{
	__asm__ ("rev %0, %1" : "=r" (x) : "r" (x));
	return x;
}
#define __arch_swab32 __arch_swab32

#endif
#endif

Annotation

• Immediate include surface: `uapi/asm/swab.h`.
• Detected declarations: `function accesses`, `function __arch_swab32`.
• Atlas domain: Architecture Layer / arch/arm.
• 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.