btrfs: constify remaining structs with function pointers
* struct extent_io_ops
* struct btrfs_free_space_op
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/free-space-cache.h b/fs/btrfs/free-space-cache.h
index f251865..33178c4 100644
--- a/fs/btrfs/free-space-cache.h
+++ b/fs/btrfs/free-space-cache.h
@@ -37,7 +37,7 @@
int total_bitmaps;
int unit;
u64 start;
- struct btrfs_free_space_op *op;
+ const struct btrfs_free_space_op *op;
void *private;
struct mutex cache_writeout_mutex;
struct list_head trimming_ranges;