3 files changed, 98 insertions, 0 deletions

diff --git a/sys/dev/zlib/zcalloc.c b/sys/dev/zlib/zcalloc.c
new file mode 100644
index 000000000000..198633d5de39
--- /dev/null
+++ b/sys/dev/zlib/zcalloc.c
@@ -0,0 +1,32 @@
+/*
+ * This file is in the public domain.
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <dev/zlib/zcalloc.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+
+MALLOC_DEFINE(M_ZLIB, "zlib", "ZLIB Compressor");
+
+void *
+zcalloc_waitok(void *nil, u_int items, u_int size)
+{
+
+	return mallocarray(items, size, M_ZLIB, M_WAITOK);
+}
+
+void *
+zcalloc_nowait(void *nil, u_int items, u_int size)
+{
+
+	return mallocarray(items, size, M_ZLIB, M_NOWAIT);
+}
+
+void
+zcfree(void *nil, void *ptr)
+{
+
+        free(ptr, M_ZLIB);
+}
diff --git a/sys/dev/zlib/zcalloc.h b/sys/dev/zlib/zcalloc.h
new file mode 100644
index 000000000000..f3e33b596346
--- /dev/null
+++ b/sys/dev/zlib/zcalloc.h
@@ -0,0 +1,13 @@
+/*
+ * This file is in the public domain.
+ * $FreeBSD$
+ */
+
+#ifndef _DEV_ZLIB_ZCALLOC_
+#define _DEV_ZLIB_ZCALLOC_
+
+void * zcalloc_waitok(void *nil, u_int items, u_int size);
+void * zcalloc_nowait(void *nil, u_int items, u_int size);
+void zcfree(void *nil, void *ptr);
+
+#endif
diff --git a/sys/dev/zlib/zlib_mod.c b/sys/dev/zlib/zlib_mod.c
new file mode 100644
index 000000000000..58f40214d3ce
--- /dev/null
+++ b/sys/dev/zlib/zlib_mod.c
@@ -0,0 +1,53 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2019 The FreeBSD Foundation
+ *
+ * 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 AUTHOR 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+
+static int
+zlib_modevent(module_t mod, int type, void *unused)
+{
+	switch (type) {
+	case MOD_LOAD:
+		return 0;
+	case MOD_UNLOAD:
+		return 0;
+	}
+	return EINVAL;
+}
+
+static moduledata_t zlib_mod = {
+	"zlib",
+	zlib_modevent,
+	0
+};
+DECLARE_MODULE(zlib, zlib_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
+MODULE_VERSION(zlib, 1);