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-rw-r--r--include/asm-s390/ccwgroup.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-s390/ccwgroup.h b/include/asm-s390/ccwgroup.h
index d2f9c0d53a97..925b3ddfa141 100644
--- a/include/asm-s390/ccwgroup.h
+++ b/include/asm-s390/ccwgroup.h
@@ -11,6 +11,7 @@ struct ccwgroup_device {
CCWGROUP_ONLINE,
} state;
atomic_t onoff;
+ struct mutex reg_mutex;
unsigned int count; /* number of attached slave devices */
struct device dev; /* master device */
struct ccw_device *cdev[0]; /* variable number, allocate as needed */
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