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btrfs: document btrfs_check_shared parameters 

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2021-01-22 11:58:00 +02:00 committed by David Sterba
parent 2639631d34
commit 6e353e3b3c
1 changed files with 7 additions and 1 deletions
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8
fs/btrfs/backref.c
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@ -1501,7 +1501,13 @@ int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
}
/**
* btrfs_check_shared - tell us whether an extent is shared
* Check if an extent is shared or not
*
* @root: root inode belongs to
* @inum: inode number of the inode whose extent we are checking
* @bytenr: logical bytenr of the extent we are checking
* @roots: list of roots this extent is shared among
* @tmp: temporary list used for iteration
*
* btrfs_check_shared uses the backref walking code but will short
* circuit as soon as it finds a root or inode that doesn't match the