os_lock_file      696 arch/um/drivers/ubd_kern.c 		err = os_lock_file(fd, openflags->w);
os_lock_file      167 arch/um/include/shared/os.h extern int os_lock_file(int fd, int excl);
os_lock_file       21 arch/um/kernel/ksyms.c EXPORT_SYMBOL(os_lock_file);