// SPDX-License-Identifier: GPL-2.0-only/* * memconsole.c * * Architecture-independent parts of the memory based BIOS console. * * Copyright 2017 Google Inc. */ #include <linux/sysfs.h>#include <linux/kobject.h>#include <linux/module.h> #include "memconsole.h" static ssize_t memconsole_read(struct file *filp, struct kobject *kobp,			       const struct bin_attribute *bin_attr, char *buf,			       loff_t pos, size_t count){	ssize_t (*memconsole_read_func)(char *, loff_t, size_t); 	memconsole_read_func = bin_attr->private;	if (WARN_ON_ONCE(!memconsole_read_func))		return -EIO; 	return memconsole_read_func(buf, pos, count);} static struct bin_attribute memconsole_bin_attr = {	.attr = {.name = "log", .mode = 0444},	.read = memconsole_read,}; void memconsole_setup(ssize_t (*read_func)(char *, loff_t, size_t)){	memconsole_bin_attr.private = read_func;}EXPORT_SYMBOL(memconsole_setup); int memconsole_sysfs_init(void){	return sysfs_create_bin_file(firmware_kobj, &memconsole_bin_attr);}EXPORT_SYMBOL(memconsole_sysfs_init); void memconsole_exit(void){	sysfs_remove_bin_file(firmware_kobj, &memconsole_bin_attr);}EXPORT_SYMBOL(memconsole_exit); MODULE_AUTHOR("Google, Inc.");MODULE_DESCRIPTION("Architecture-independent parts of the memory based BIOS console");MODULE_LICENSE("GPL");