arch/x86/lib/pc-conf-reg.c

Source file repositories/reference/linux-study-clean/arch/x86/lib/pc-conf-reg.c

File Facts

System
Linux kernel
Corpus path
arch/x86/lib/pc-conf-reg.c
Extension
.c
Size
425 bytes
Lines
14
Domain
Architecture Layer
Bucket
arch/x86
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.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * Support for the configuration register space at port I/O locations
 * 0x22 and 0x23 variously used by PC architectures, e.g. the MP Spec,
 * Cyrix CPUs, numerous chipsets.  As the space is indirectly addressed
 * it may have to be protected with a spinlock, depending on the context.
 */

#include <linux/spinlock.h>

#include <asm/pc-conf-reg.h>

DEFINE_RAW_SPINLOCK(pc_conf_lock);

Annotation

Implementation Notes