[PATCH v6 84/99] btrfs: Convert fs_roots_radix to XArray

From: Matthew Wilcox Most of the gang lookups being done can be expressed just as efficiently and somewhat more naturally as xa_for_each() loops. I opted not to change the one in btrfs_cleanup_fs_roots() as it's using SRCU which is subtle and quick to anger.

[PATCH v6 84/99] btrfs: Convert fs_roots_radix to XArray

From: Matthew Wilcox Most of the gang lookups being done can be expressed just as efficiently and somewhat more naturally as xa_for_each() loops. I opted not to change the one in btrfs_cleanup_fs_roots() as it's using SRCU which is subtle and quick to anger. Signed-off-by: Matthew Wilcox ---