git: 860d777158f9 - stable/13 - linuxkpi: Add typecheck.h

The branch stable/13 has been updated by manu:

URL: https://cgit.FreeBSD.org/src/commit/?id=860d777158f99124561d37cdcc811ecd571bf1a7

commit 860d777158f99124561d37cdcc811ecd571bf1a7
Author:     Emmanuel Vadot <manu@FreeBSD.org>
AuthorDate: 2022-06-23 08:10:07 +0000
Commit:     Emmanuel Vadot <manu@FreeBSD.org>
CommitDate: 2022-09-07 15:09:02 +0000

    linuxkpi: Add typecheck.h
    
    typecheck macro check if the type of a variable matches a type.
    
    MFC after:      1 week
    Sponsored by:   Beckhoff Automation GmbH & Co. KG
    Differential Revision:  https://reviews.freebsd.org/D35569
    
    (cherry picked from commit 631bf94fe9dffb48377061e5b95812990f687b3d)
---
 .../linuxkpi/common/include/linux/typecheck.h      | 38 ++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/typecheck.h b/sys/compat/linuxkpi/common/include/linux/typecheck.h
new file mode 100644
index 000000000000..0e813962a7f5
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/typecheck.h
@@ -0,0 +1,38 @@
+/*-
+ * Copyright (c) 2022 Beckhoff Automation GmbH & Co. KG
+ *
+ * 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.
+ *
+ */
+
+#ifndef _LINUXKPI_LINUX_TYPECHECK_H_
+#define	_LINUXKPI_LINUX_TYPECHECK_H_
+
+#define typecheck(type,x) \
+({	type __var1; \
+	typeof(x) __var2; \
+	(void)(&__var1 == &__var2); \
+	1; \
+})
+
+
+#endif	/* _LINUXKPI_LINUX_TYPECHECK_H_ */