提交 3cbf26da 编写于 作者: M Matthew Wilcox 提交者: David Sterba

btrfs: Remove unused readahead spinlock

The reada_lock in struct btrfs_device was only initialised, and not
actually used.  That's good because there's another lock also called
reada_lock in the btrfs_fs_info that was quite heavily used.  Remove
this one.
Signed-off-by: NMatthew Wilcox <mawilcox@microsoft.com>
Reviewed-by: NDavid Sterba <dsterba@suse.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>
上级 7583d8d0
......@@ -319,7 +319,6 @@ static struct btrfs_device *__alloc_device(void)
spin_lock_init(&dev->io_lock);
spin_lock_init(&dev->reada_lock);
atomic_set(&dev->reada_in_flight, 0);
atomic_set(&dev->dev_stats_ccnt, 0);
btrfs_device_data_ordered_init(dev);
......
......@@ -137,7 +137,6 @@ struct btrfs_device {
struct rcu_head rcu;
/* readahead state */
spinlock_t reada_lock;
atomic_t reada_in_flight;
u64 reada_next;
struct reada_zone *reada_curr_zone;
......
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