Cregit: Linux 6.15: sysfs

Contributors: 5
Author	Tokens	Token Proportion	Commits	Commit Proportion
Andrii Nakryiko	105	82.68%	2	33.33%
Thomas Weißschuh	8	6.30%	1	16.67%
Tony Ambardar	7	5.51%	1	16.67%
Fangrui Song	4	3.15%	1	16.67%
Wei Yongjun	3	2.36%	1	16.67%
Total	127		6

// SPDX-License-Identifier: GPL-2.0
/*
 * Provide kernel BTF information for introspection and use by eBPF tools.
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kobject.h>
#include <linux/init.h>
#include <linux/sysfs.h>

/* See scripts/link-vmlinux.sh, gen_btf() func for details */
extern char __start_BTF[];
extern char __stop_BTF[];

static struct bin_attribute bin_attr_btf_vmlinux __ro_after_init = {
	.attr = { .name = "vmlinux", .mode = 0444, },
	.read_new = sysfs_bin_attr_simple_read,
};

struct kobject *btf_kobj;

static int __init btf_vmlinux_init(void)
{
	bin_attr_btf_vmlinux.private = __start_BTF;
	bin_attr_btf_vmlinux.size = __stop_BTF - __start_BTF;

	if (bin_attr_btf_vmlinux.size == 0)
		return 0;

	btf_kobj = kobject_create_and_add("btf", kernel_kobj);
	if (!btf_kobj)
		return -ENOMEM;

	return sysfs_create_bin_file(btf_kobj, &bin_attr_btf_vmlinux);
}

subsys_initcall(btf_vmlinux_init);

sysfs_btf.c