set_fs(old_fs);

mod->args = args;
if (section_addr(hdr, sechdrs, secstrings, "__obsparm"))
printk(KERN_WARNING "%s: Ignoring obsolete parameters\n",
mod->name);

/* Now sew it into the lists so we can get lockdep and oops
* info during argument parsing. Noone should access us, since
* strong_try_module_get() will fail.
* lockdep/oops can run asynchronous, so use the RCU list insertion
* function to insert in a way safe to concurrent readers.
* The mutex protects against concurrent writers.
*/
list_add_rcu(&mod->list, &modules);

/*
* 解析插入模块时指定的参数。
*/
err = parse_args(mod->name, mod->args, mod->kp, mod->num_kp, NULL);
if (err < 0)
goto unlink;

/*
* 在sysfs中创建模块相应的项
*/
err = mod_sysfs_setup(mod, mod->kp, mod->num_kp);
if (err < 0)
goto unlink;
/*
* 添加段属性
*/
add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
/*
* 添加注解属性
*/
add_notes_attrs(mod, hdr->e_shnum, secstrings, sechdrs);

/* Get rid of temporary copy */
vfree(hdr);

trace_module_load(mod);

/* Done! */
return mod;

unlink:
/* Unlink carefully: kallsyms could be walking list. */
list_del_rcu(&mod->list);
synchronize_sched();
module_arch_cleanup(mod);
cleanup:
free_modinfo(mod);
kobject_del(&mod->mkobj.kobj);
kobject_put(&mod->mkobj.kobj);
free_unload:
module_unload_free(mod);
#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP)
percpu_modfree(mod->refptr);
free_init:
#endif
module_free(mod, mod->module_init);
free_core:
module_free(mod, mod->module_core);
/* mod will be freed with core. Don't access it beyond this line! */
free_percpu:
if (percpu)
percpu_modfree(percpu);
free_mod:
kfree(args);
kfree(strmap);
free_hdr:
vfree(hdr);
return ERR_PTR(err);

truncated:
printk(KERN_ERR "Module len %lu truncated\n", len);
err = -ENOEXEC;
goto free_hdr;
}