fs/proc/interrupts.c

Source file repositories/reference/linux-study-clean/fs/proc/interrupts.c

File Facts

System
Linux kernel
Corpus path
fs/proc/interrupts.c
Extension
.c
Size
859 bytes
Lines
43
Domain
Core OS
Bucket
VFS And Filesystem Core
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irqnr.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>

/*
 * /proc/interrupts
 */
static void *int_seq_start(struct seq_file *f, loff_t *pos)
{
	return *pos <= irq_get_nr_irqs() ? pos : NULL;
}

static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
{
	(*pos)++;
	if (*pos > irq_get_nr_irqs())
		return NULL;
	return pos;
}

static void int_seq_stop(struct seq_file *f, void *v)
{
	/* Nothing to do */
}

static const struct seq_operations int_seq_ops = {
	.start = int_seq_start,
	.next  = int_seq_next,
	.stop  = int_seq_stop,
	.show  = show_interrupts
};

static int __init proc_interrupts_init(void)
{
	proc_create_seq("interrupts", 0, NULL, &int_seq_ops);
	return 0;
}
fs_initcall(proc_interrupts_init);

Annotation

Implementation Notes