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-rw-r--r--include/asm-s390/schid.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/include/asm-s390/schid.h b/include/asm-s390/schid.h
new file mode 100644
index 0000000..5017ffa
--- /dev/null
+++ b/include/asm-s390/schid.h
@@ -0,0 +1,28 @@
+#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)));
+
+
+/* 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 */
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