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cfq-iosched: move group scheduling functions under ifdef 

If CFQ_GROUP_IOSCHED is not set, the compiler produces the
following warning:

  CC      block/cfq-iosched.o
  linux/block/cfq-iosched.c:469:2:
    warning: 'cpd_to_cfqgd' defined but not used [-Wunused-function]
    *cpd_to_cfqgd(struct blkcg_policy_data *cpd)
     ^

In reality, two other lookup functions aren't used either if
CFQ_GROUP_IOSCHED isn't set. Move all three under one of the
CFQ_GROUP_IOSCHED sections in the code.

Reported-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Jens Axboe 2015-06-19 10:13:01 -06:00
parent 0bb979472a
commit 4ceab71b9d
1 changed files with 16 additions and 16 deletions
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32
block/cfq-iosched.c
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@ -460,22 +460,6 @@ CFQ_CFQQ_FNS(deep);
CFQ_CFQQ_FNS(wait_busy);
#undef CFQ_CFQQ_FNS
static inline struct cfq_group *pd_to_cfqg(struct blkg_policy_data *pd)
{
return pd ? container_of(pd, struct cfq_group, pd) : NULL;
}
static struct cfq_group_data
*cpd_to_cfqgd(struct blkcg_policy_data *cpd)
{
return cpd ? container_of(cpd, struct cfq_group_data, pd) : NULL;
}
static inline struct blkcg_gq *cfqg_to_blkg(struct cfq_group *cfqg)
{
return pd_to_blkg(&cfqg->pd);
}
#if defined(CONFIG_CFQ_GROUP_IOSCHED) && defined(CONFIG_DEBUG_BLK_CGROUP)
/* cfqg stats flags */
@ -620,6 +604,22 @@ static inline void cfqg_stats_update_avg_queue_size(struct cfq_group *cfqg) { }
#ifdef CONFIG_CFQ_GROUP_IOSCHED
static inline struct cfq_group *pd_to_cfqg(struct blkg_policy_data *pd)
{
return pd ? container_of(pd, struct cfq_group, pd) : NULL;
}
static struct cfq_group_data
*cpd_to_cfqgd(struct blkcg_policy_data *cpd)
{
return cpd ? container_of(cpd, struct cfq_group_data, pd) : NULL;
}
static inline struct blkcg_gq *cfqg_to_blkg(struct cfq_group *cfqg)
{
return pd_to_blkg(&cfqg->pd);
}
static struct blkcg_policy blkcg_policy_cfq;
static inline struct cfq_group *blkg_to_cfqg(struct blkcg_gq *blkg)