1 files changed, 22 insertions, 0 deletions
diff --git a/arch/s390/include/asm/schid.h b/arch/s390/include/asm/schid.h
new file mode 100644
index 000000000..3ac405a67
--- /dev/null
+++ b/arch/s390/include/asm/schid.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef ASM_SCHID_H
+#define ASM_SCHID_H
+
+#include <linux/string.h>
+#include <uapi/asm/schid.h>
+
+/* Helper function for sane state of pre-allocated subchannel_id. */
+static inline void
+init_subchannel_id(struct subchannel_id *schid)
+{
+	memset(schid, 0, sizeof(struct subchannel_id));
+	schid->one = 1;
+}
+
+static inline int
+schid_equal(struct subchannel_id *schid1, struct subchannel_id *schid2)
+{
+	return !memcmp(schid1, schid2, sizeof(struct subchannel_id));
+}
+
+#endif /* ASM_SCHID_H */