1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/s390/cio/schid.h b/drivers/s390/cio/schid.h
new file mode 100644
index 0000000000000..54328fec5adea
--- /dev/null
+++ b/drivers/s390/cio/schid.h
@@ -0,0 +1,26 @@
+#ifndef S390_SCHID_H
+#define S390_SCHID_H
+
+struct subchannel_id {
+	__u32 reserved:13;
+	__u32 ssid:2;
+	__u32 one:1;
+	__u32 sch_no:16;
+} __attribute__ ((packed,aligned(4)));
+
+
+/* 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 /* S390_SCHID_H */