Commit 31f37269 authored by Pankaj Raghav's avatar Pankaj Raghav Committed by David Sterba
Browse files

btrfs: zoned: fix comment description for sb_write_pointer logic 



Fix the comment to represent the actual logic used for sb_write_pointer

- Empty[0] && In use[1] should be an invalid state instead of returning
  zone 0 wp
- Empty[0] && Full[1] should be returning zone 0 wp instead of zone 1 wp
- In use[0] && Empty[1] should be returning zone 0 wp instead of being an
  invalid state
- In use[0] && Full[1] should be returning zone 0 wp instead of returning
  zone 1 wp
- Full[0] && Empty[1] should be returning zone 1 wp instead of returning
  zone 0 wp
- Full[0] && In use[1] should be returning zone 1 wp instead of returning
  zone 0 wp

Reviewed-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: default avatarPankaj Raghav <p.raghav@samsung.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 143823cf

fs/btrfs/zoned.c

+3 −3
Original line number Diff line number Diff line
@@ -94,9 +94,9 @@ static int sb_write_pointer(struct block_device *bdev, struct blk_zone *zones, 
	 * Possible states of log buffer zones

	 *

	 *           Empty[0]  In use[0]  Full[0]

	 * Empty[1]         *          x        0

	 * In use[1]        0          x        0

	 * Full[1]          1          1        C

	 * Empty[1]         *          0        1

	 * In use[1]        x          x        1

	 * Full[1]          0          0        C

	 *

	 * Log position:

	 *   *: Special case, no superblock is written