usermodehelper_read_lock_wait  558 drivers/base/firmware_loader/fallback.c 		timeout = usermodehelper_read_lock_wait(timeout);
usermodehelper_read_lock_wait   81 include/linux/umh.h extern long usermodehelper_read_lock_wait(long timeout);
usermodehelper_read_lock_wait  288 kernel/umh.c   EXPORT_SYMBOL_GPL(usermodehelper_read_lock_wait);