debug: move all of the debug bits out of the spl

Pull all of the internal debug infrastructure up in to the zfs
code to clean up the layering.  Remove all the dodgy usage of
SET_ERROR and DTRACE_PROBE from the spl.  Luckily it was
lightly used in the spl layer so we're not losing much.

Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #17861

include/os/freebsd/spl/sys/sdt.h

@@ -1,47 +0,0 @@
-// SPDX-License-Identifier: BSD-2-Clause
-/*
- * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $FreeBSD$
- */
-
-#ifndef _OPENSOLARIS_SYS_SDT_H_
-#define	_OPENSOLARIS_SYS_SDT_H_
-
-#include_next <sys/sdt.h>
-#ifdef KDTRACE_HOOKS
-SDT_PROBE_DECLARE(sdt, , , set__error);
-
-/* BEGIN CSTYLED */
-#define	SET_ERROR(err)	({ 					\
-	SDT_PROBE1(sdt, , , set__error, (uintptr_t)err);	\
-	err;							\
-})
-/* END CSTYLED */
-#else
-#define	SET_ERROR(err) (err)
-#endif
-
-#endif	/* _OPENSOLARIS_SYS_SDT_H_ */

include/os/freebsd/spl/sys/trace_zfs.h

@@ -1 +0,0 @@
-/* keep me */