blkcg: make blkcg_activate_policy() allow NULL ->pd_init_fn
blkg_create() allows NULL ->pd_init_fn() but blkcg_activate_policy() doesn't. As both in-kernel policies implement ->pd_init_fn, it currently doesn't break anything. Update blkcg_activate_policy() so that its behavior is consistent with blkg_create(). Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
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1 changed files with 2 additions and 1 deletions
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@ -1083,6 +1083,7 @@ int blkcg_activate_policy(struct request_queue *q,
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blkg->pd[pol->plid] = pd;
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blkg->pd[pol->plid] = pd;
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pd->blkg = blkg;
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pd->blkg = blkg;
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pd->plid = pol->plid;
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pd->plid = pol->plid;
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if (pol->pd_init_fn)
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pol->pd_init_fn(blkg);
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pol->pd_init_fn(blkg);
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}
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}
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