From d02ea5170a42bb62663e07bdc0ec2054fb0d6e27 Mon Sep 17 00:00:00 2001
From: Rob Norris <robn@despairlabs.com>
Date: Fri, 24 Oct 2025 22:32:31 +1100
Subject: [PATCH] libspl: init/fini

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #17861
---
 lib/libspl/Makefile.am         |  1 +
 lib/libspl/include/Makefile.am |  1 +
 lib/libspl/include/libspl.h    | 40 ++++++++++++++++++++++++++++++++++
 lib/libspl/libspl.c            | 36 ++++++++++++++++++++++++++++++
 lib/libzpool/kernel.c          |  4 ++++
 5 files changed, 82 insertions(+)
 create mode 100644 lib/libspl/include/libspl.h
 create mode 100644 lib/libspl/libspl.c

diff --git a/lib/libspl/Makefile.am b/lib/libspl/Makefile.am
index a6afd1793..3d46829ed 100644
--- a/lib/libspl/Makefile.am
+++ b/lib/libspl/Makefile.am
@@ -21,6 +21,7 @@ libspl_la_SOURCES = \
 	%D%/getexecname.c \
 	%D%/kmem.c \
 	%D%/kstat.c \
+	%D%/libspl.c \
 	%D%/list.c \
 	%D%/mkdirp.c \
 	%D%/mutex.c \
diff --git a/lib/libspl/include/Makefile.am b/lib/libspl/include/Makefile.am
index 486cce3f1..41139d33e 100644
--- a/lib/libspl/include/Makefile.am
+++ b/lib/libspl/include/Makefile.am
@@ -4,6 +4,7 @@ libspl_HEADERS = \
 	%D%/atomic.h \
 	%D%/libgen.h \
 	%D%/libshare.h \
+	%D%/libspl.h \
 	%D%/statcommon.h \
 	%D%/stdlib.h \
 	%D%/string.h \
diff --git a/lib/libspl/include/libspl.h b/lib/libspl/include/libspl.h
new file mode 100644
index 000000000..68756bb95
--- /dev/null
+++ b/lib/libspl/include/libspl.h
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: CDDL-1.0
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or https://opensource.org/licenses/CDDL-1.0.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2025, Rob Norris <robn@despairlabs.com>
+ */
+
+#ifndef _LIBSPL_H
+#define	_LIBSPL_H extern __attribute__((visibility("default")))
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+_LIBSPL_H void libspl_init(void);
+_LIBSPL_H void libspl_fini(void);
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif /* _LIBSPL_H */
diff --git a/lib/libspl/libspl.c b/lib/libspl/libspl.c
new file mode 100644
index 000000000..7c24f5cc0
--- /dev/null
+++ b/lib/libspl/libspl.c
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: CDDL-1.0
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or https://opensource.org/licenses/CDDL-1.0.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2025, Rob Norris <robn@despairlabs.com>
+ */
+
+#include <libspl.h>
+
+void
+libspl_init(void)
+{
+}
+
+void
+libspl_fini(void)
+{
+}
diff --git a/lib/libzpool/kernel.c b/lib/libzpool/kernel.c
index d7ff74cba..24d6fada3 100644
--- a/lib/libzpool/kernel.c
+++ b/lib/libzpool/kernel.c
@@ -505,6 +505,8 @@ kernel_init(int mode)
 {
 	extern uint_t rrw_tsd_key;
 
+	libspl_init();
+
 	umem_nofail_callback(umem_out_of_memory);
 
 	physmem = sysconf(_SC_PHYS_PAGES);
@@ -543,6 +545,8 @@ kernel_fini(void)
 	system_taskq_fini();
 
 	random_fini();
+
+	libspl_fini();
 }
 
 int