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-rw-r--r--arch/s390/include/asm/diag.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/include/asm/diag.h b/arch/s390/include/asm/diag.h
index fb5a886ff47f..bed804137537 100644
--- a/arch/s390/include/asm/diag.h
+++ b/arch/s390/include/asm/diag.h
@@ -109,6 +109,8 @@ enum diag204_sc {
DIAG204_SUBC_STIB7 = 7
};
+#define DIAG204_SUBCODE_MASK 0xffff
+
/* The two available diag 204 data formats */
enum diag204_format {
DIAG204_INFO_SIMPLE = 0,