usermodehelper_read_trylock  565 drivers/base/firmware_loader/fallback.c 		ret = usermodehelper_read_trylock();
usermodehelper_read_trylock   80 include/linux/umh.h extern int usermodehelper_read_trylock(void);
usermodehelper_read_trylock  261 kernel/umh.c   EXPORT_SYMBOL_GPL(usermodehelper_read_trylock);