Percpu reference counters should now be initialized with the PERCPU_REF_ALLOW_REINIT in order to allow switching them to the percpu mode from the atomic mode. To make percpu_ref_switch_to_percpu() call in set_in_sync() succeed,let's initialize percpu refcounters with the PERCU_REF_ALLOW_REINIT flag.
Signed-off-by: Roman Gushchin <[email protected]> --- drivers/md/md.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index 45ffa23fa85d..6b60211d0b3e 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5245,7 +5245,8 @@ int mddev_init_writes_pending(struct mddev *mddev) { if (mddev->writes_pending.percpu_count_ptr) return 0; - if (percpu_ref_init(&mddev->writes_pending, no_op, 0, GFP_KERNEL) < 0) + if (percpu_ref_init(&mddev->writes_pending, no_op, + PERCPU_REF_ALLOW_REINIT, GFP_KERNEL) < 0) return -ENOMEM; /* We want to start with the refcount at zero */ percpu_ref_put(&mddev->writes_pending); -- 2.20.1
