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-rw-r--r--tools/testing/selftests/ublk/kublk.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/ublk/kublk.h b/tools/testing/selftests/ublk/kublk.h
index cb757fd9bf9d..69fd5794f300 100644
--- a/tools/testing/selftests/ublk/kublk.h
+++ b/tools/testing/selftests/ublk/kublk.h
@@ -262,7 +262,7 @@ static inline __u64 build_user_data(unsigned tag, unsigned op,
_Static_assert(UBLK_MAX_QUEUES_SHIFT <= 7);
assert(!(tag >> 16) && !(op >> 8) && !(tgt_data >> 16) && !(q_id >> 7));
- return tag | (op << 16) | (tgt_data << 24) |
+ return tag | ((__u64)op << 16) | ((__u64)tgt_data << 24) |
(__u64)q_id << 56 | (__u64)is_target_io << 63;
}