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Commit 3cbf26da authored by Matthew Wilcox's avatar Matthew Wilcox Committed by David Sterba
Browse files

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: default avatarMatthew Wilcox <mawilcox@microsoft.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 7583d8d0

fs/btrfs/volumes.c

+0 −1
Original line number Diff line number Diff line
@@ -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);

fs/btrfs/volumes.h

+0 −1
Original line number Diff line number Diff line
@@ -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;