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Commit 13e88e15 authored by Anand Jain's avatar Anand Jain Committed by David Sterba
Browse files

btrfs: delete unused member nobarriers 



The last consumer of nobarriers is removed by the commit [1] and sync
won't fail with EOPNOTSUPP anymore. Thus, now when write cache is write
through it just return success without actually transpiring such a
request to the block device/lun.

[1]
commit b25de9d6
block: remove BIO_EOPNOTSUPP

And, as the device/lun write cache state may change dynamically saving
such as state won't help either. So deleting the member nobarriers.

Signed-off-by: default avatarAnand Jain <anand.jain@oracle.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 28d70e23

fs/btrfs/disk-io.c

+0 −3
Original line number Diff line number Diff line
@@ -3521,9 +3521,6 @@ static int write_dev_flush(struct btrfs_device *device, int wait) 
	struct bio *bio;

	int ret = 0;



	if (device->nobarriers)

		return 0;



	if (wait) {

		bio = device->flush_bio;

		if (!bio)

fs/btrfs/volumes.h

+0 −1
Original line number Diff line number Diff line
@@ -123,7 +123,6 @@ struct btrfs_device { 
	struct list_head resized_list;



	/* for sending down flush barriers */

	int nobarriers;

	struct bio *flush_bio;

	struct completion flush_wait;