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-rw-r--r--block/ll_rw_blk.c2
-rw-r--r--fs/ioprio.c3
2 files changed, 5 insertions, 0 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 61d6b3c65b6..ddd9253f9d5 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -3628,6 +3628,8 @@ struct io_context *current_io_context(gfp_t gfp_flags)
ret->nr_batch_requests = 0; /* because this is 0 */
ret->aic = NULL;
ret->cic_root.rb_node = NULL;
+ /* make sure set_task_ioprio() sees the settings above */
+ smp_wmb();
tsk->io_context = ret;
}
diff --git a/fs/ioprio.c b/fs/ioprio.c
index 3db31038e9a..06578311c63 100644
--- a/fs/ioprio.c
+++ b/fs/ioprio.c
@@ -44,6 +44,9 @@ static int set_task_ioprio(struct task_struct *task, int ioprio)
task->ioprio = ioprio;
ioc = task->io_context;
+ /* see wmb() in current_io_context() */
+ smp_read_barrier_depends();
+
if (ioc && ioc->set_ioprio)
ioc->set_ioprio(ioc, ioprio);