btrfs: Document parameters of btrfs_reserve_extent
authorNikolay Borisov <nborisov@suse.com>
Tue, 13 Mar 2018 10:22:32 +0000 (12:22 +0200)
committerDavid Sterba <dsterba@suse.com>
Fri, 30 Mar 2018 23:26:56 +0000 (01:26 +0200)
commit6f47c706d9d4055ecdd125023577a20449c12b24
tree7837f05b310758fc385b99ef4842204f982af0a4
parentd87ff75863e92a500538ab53318c5740f196631e
btrfs: Document parameters of btrfs_reserve_extent

This function is the entry to the extent allocator and as such has
quite a number of parameters. Some of those have subtle effects on the
allocation algorithm. Document the parameters.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/extent-tree.c