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| author | Roman Gushchin <guro@fb.com> | 2019-05-07 10:01:49 -0700 |
|---|---|---|
| committer | Dennis Zhou <dennis@kernel.org> | 2019-05-09 10:50:59 -0700 |
| commit | ddde2af747ad79010f14691f381522987fbcb860 (patch) | |
| tree | 6e2b6287133d7ae7f2a49ba3f1a4dc014933806c /drivers/md/md.c | |
| parent | 214828962dead0c698f92b60ef97ce3c5fc2c8fe (diff) | |
| download | linux-ddde2af747ad79010f14691f381522987fbcb860.tar.gz linux-ddde2af747ad79010f14691f381522987fbcb860.tar.bz2 linux-ddde2af747ad79010f14691f381522987fbcb860.zip | |
md: initialize percpu refcounters using PERCU_REF_ALLOW_REINIT
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 <guro@fb.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 05ffffb8b769..16e034747a86 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5249,7 +5249,8 @@ 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); |