From: Heiko Carstens <hca@linux.ibm.com>
Date: Wed, 9 Jun 2021 20:59:13 +0000 (+0200)
Subject: s390: introduce register pair union
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c4655a2098236d36c5b0678e56c9ea04308b45ed;p=linux.git

s390: introduce register pair union

Introduce a register pair union, which is supposed to be used for
inline assemblies where instructions require parameters in even/odd
numbered register pairs.

This is more or less the same register pair construct which was
available for 31 bit builds which was removed with commit 5a79859ae0f3
("s390: remove 31 bit support").

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---

diff --git a/arch/s390/include/asm/types.h b/arch/s390/include/asm/types.h
new file mode 100644
index 0000000000000..0b5d550a0478b
--- /dev/null
+++ b/arch/s390/include/asm/types.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef _ASM_S390_TYPES_H
+#define _ASM_S390_TYPES_H
+
+#include <uapi/asm/types.h>
+
+#ifndef __ASSEMBLY__
+
+union register_pair {
+	unsigned __int128 pair;
+	struct {
+		unsigned long even;
+		unsigned long odd;
+	};
+};
+
+#endif /* __ASSEMBLY__ */
+#endif /* _ASM_S390_TYPES_H */