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Subject[PATCH 02/10] blkcg: make ->cpd_init_fn() optional
Date
For policies which can do enough initialization from ->cpd_alloc_fn(),
make ->cpd_init_fn() optional.

Signed-off-by: Tejun Heo <tj@kernel.org>
---
block/blk-cgroup.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 75f7f78b87b2..818e50b4cc7a 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1478,7 +1478,8 @@ int blkcg_policy_register(struct blkcg_policy *pol)
blkcg->cpd[pol->plid] = cpd;
cpd->blkcg = blkcg;
cpd->plid = pol->plid;
- pol->cpd_init_fn(cpd);
+ if (pol->cpd_init_fn)
+ pol->cpd_init_fn(cpd);
}
}

--
2.17.1
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