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blkio: Fix compile errors

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Fixes compile errors in blk-cgroup code for empty_time stat and a merge fix in
CFQ. The first error was when CONFIG_DEBUG_CFQ_IOSCHED is not set.

Signed-off-by: Divyesh Shah <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Divyesh Shah 2010-04-14 11:22:38 +02:00 • committed by Jens Axboe
commit 28baf44299
2 changed files with 28 additions and 28 deletions
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54
block/blk-cgroup.c
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@ -219,6 +219,33 @@ void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg)
}
EXPORT_SYMBOL_GPL(blkiocg_update_avg_queue_size_stats);
void blkiocg_set_start_empty_time(struct blkio_group *blkg, bool ignore)
{
unsigned long flags;
struct blkio_group_stats *stats;
spin_lock_irqsave(&blkg->stats_lock, flags);
stats = &blkg->stats;
if (stats->stat_arr[BLKIO_STAT_QUEUED][BLKIO_STAT_READ] ||
stats->stat_arr[BLKIO_STAT_QUEUED][BLKIO_STAT_WRITE]) {
spin_unlock_irqrestore(&blkg->stats_lock, flags);
return;
}
/*
* If ignore is set, we do not panic on the empty flag being set
* already. This is to avoid cases where there are superfluous timeslice
* complete events (for eg., forced_dispatch in CFQ) when no IOs are
* served which could result in triggering the empty check incorrectly.
*/
BUG_ON(!ignore && blkio_blkg_empty(stats));
stats->start_empty_time = sched_clock();
blkio_mark_blkg_empty(stats);
spin_unlock_irqrestore(&blkg->stats_lock, flags);
}
EXPORT_SYMBOL_GPL(blkiocg_set_start_empty_time);
void blkiocg_update_dequeue_stats(struct blkio_group *blkg,
unsigned long dequeue)
{
@ -268,33 +295,6 @@ void blkiocg_update_timeslice_used(struct blkio_group *blkg, unsigned long time)
}
EXPORT_SYMBOL_GPL(blkiocg_update_timeslice_used);
void blkiocg_set_start_empty_time(struct blkio_group *blkg, bool ignore)
{
unsigned long flags;
struct blkio_group_stats *stats;
spin_lock_irqsave(&blkg->stats_lock, flags);
stats = &blkg->stats;
if (stats->stat_arr[BLKIO_STAT_QUEUED][BLKIO_STAT_READ] ||
stats->stat_arr[BLKIO_STAT_QUEUED][BLKIO_STAT_WRITE]) {
spin_unlock_irqrestore(&blkg->stats_lock, flags);
return;
}
/*
* If ignore is set, we do not panic on the empty flag being set
* already. This is to avoid cases where there are superfluous timeslice
* complete events (for eg., forced_dispatch in CFQ) when no IOs are
* served which could result in triggering the empty check incorrectly.
*/
BUG_ON(!ignore && blkio_blkg_empty(stats));
stats->start_empty_time = sched_clock();
blkio_mark_blkg_empty(stats);
spin_unlock_irqrestore(&blkg->stats_lock, flags);
}
EXPORT_SYMBOL_GPL(blkiocg_set_start_empty_time);
void blkiocg_update_dispatch_stats(struct blkio_group *blkg,
uint64_t bytes, bool direction, bool sync)
{