1 files changed, 32 insertions, 0 deletions

diff --git a/arch/s390/include/asm/schid.h b/arch/s390/include/asm/schid.h
new file mode 100644
index 000000000000..825503cf3dc2
--- /dev/null
+++ b/arch/s390/include/asm/schid.h
@@ -0,0 +1,32 @@
+#ifndef ASM_SCHID_H
+#define ASM_SCHID_H
+
+struct subchannel_id {
+        __u32 cssid : 8;
+        __u32 : 4;
+        __u32 m : 1;
+        __u32 ssid : 2;
+        __u32 one : 1;
+        __u32 sch_no : 16;
+} __attribute__ ((packed, aligned(4)));
+
+#ifdef __KERNEL__
+#include <linux/string.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 /* __KERNEL__ */
+
+#endif /* ASM_SCHID_H */