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btrfs: cleanup device states define BTRFS_DEV_STATE_WRITEABLE

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Currently device state is being managed by each individual int
variable such as struct btrfs_device::writeable. Instead of that
declare device state BTRFS_DEV_STATE_WRITEABLE and use the
bit operations.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
[ whitespace adjustments ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain
2017-12-04 12:54:52 +08:00
committed by David Sterba
parent 3c958bd23b
commit ebbede42d4
7 changed files with 49 additions and 34 deletions
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2
fs/btrfs/extent-tree.c
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@@ -10878,7 +10878,7 @@ static int btrfs_trim_free_extents(struct btrfs_device *device,
*trimmed = 0;
/* Not writeable = nothing to do. */
if (!device->writeable)
if (!test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state))
return 0;
/* No free space = nothing to do. */