diff options
Diffstat (limited to 'drivers/s390/cio')
| -rw-r--r-- | drivers/s390/cio/airq.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/s390/cio/airq.c b/drivers/s390/cio/airq.c index fe6cea15bbaf..d3850dc30e42 100644 --- a/drivers/s390/cio/airq.c +++ b/drivers/s390/cio/airq.c @@ -133,6 +133,8 @@ void do_adapter_IO(u8 isc) while (word) { if (word & INDICATOR_MASK) { airq = airqs[isc][i]; + /* Make sure gcc reads from airqs only once. */ + barrier(); if (likely(airq)) airq->handler(&indicators[isc].byte[i], airq->drv_data); |