* Copyright (c) 1982, 1986, 1991 Regents of the University of California.
* %sccs.include.redist.c%
* @(#)subr_xxx.c 7.13 (Berkeley) %G%
* Miscellaneous trivial functions, including many
* that are often inline-expanded or done in assembler.
* Unsupported device function (e.g. writing to read-only device).
* Unconfigured device function; driver not configured.
* Unsupported ioctl function.
* Unsupported system function.
* This is used for an otherwise-reasonable operation
* that is not supported by the current system binary.
* Return error for operation not supported
* on a specific object or file type.
* Generic null operation, always returns success.