btrfs: change name and type of private member of btrfs_free_space_ctl

btrfs_free_space_ctl::private is either unset or it always points to
struct btrfs_block_group when it is set. So there's no point in keeping
the unhelpful 'private' name and keeping it an untyped pointer. Change
both the type and name to be self-describing. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 053103b..132209f 100644 (file)
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -666,7 +666,7 @@ static int io_ctl_read_bitmap(struct btrfs_io_ctl *io_ctl,
 
 static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl)
 {
-       struct btrfs_block_group *block_group = ctl->private;
+       struct btrfs_block_group *block_group = ctl->block_group;
        u64 max_bytes;
        u64 bitmap_bytes;
        u64 extent_bytes;
@@ -2182,7 +2182,7 @@ static u64 add_bytes_to_bitmap(struct btrfs_free_space_ctl *ctl,
 static bool use_bitmap(struct btrfs_free_space_ctl *ctl,
                      struct btrfs_free_space *info)
 {
-       struct btrfs_block_group *block_group = ctl->private;
+       struct btrfs_block_group *block_group = ctl->block_group;
        struct btrfs_fs_info *fs_info = block_group->fs_info;
        bool forced = false;
 
@@ -2251,7 +2251,7 @@ static int insert_into_bitmap(struct btrfs_free_space_ctl *ctl,
                return 0;
 
        if (ctl->op == &free_space_op)
-               block_group = ctl->private;
+               block_group = ctl->block_group;
 again:
        /*
         * Since we link bitmaps right into the cluster we need to see if we
@@ -2868,7 +2868,7 @@ void btrfs_init_free_space_ctl(struct btrfs_block_group *block_group,
        spin_lock_init(&ctl->tree_lock);
        ctl->unit = fs_info->sectorsize;
        ctl->start = block_group->start;
-       ctl->private = block_group;
+       ctl->block_group = block_group;
        ctl->op = &free_space_op;
        ctl->free_space_bytes = RB_ROOT_CACHED;
        INIT_LIST_HEAD(&ctl->trimming_ranges);
@@ -2967,8 +2967,8 @@ void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl)
 {
        spin_lock(&ctl->tree_lock);
        __btrfs_remove_free_space_cache_locked(ctl);
-       if (ctl->private)
-               btrfs_discard_update_discardable(ctl->private);
+       if (ctl->block_group)
+               btrfs_discard_update_discardable(ctl->block_group);
        spin_unlock(&ctl->tree_lock);
 }
 

diff --git a/fs/btrfs/free-space-cache.h b/fs/btrfs/free-space-cache.h
index b8a755f..15591b2 100644 (file)
--- a/fs/btrfs/free-space-cache.h
+++ b/fs/btrfs/free-space-cache.h
@@ -56,7 +56,7 @@ struct btrfs_free_space_ctl {
        s32 discardable_extents[BTRFS_STAT_NR_ENTRIES];
        s64 discardable_bytes[BTRFS_STAT_NR_ENTRIES];
        const struct btrfs_free_space_op *op;
-       void *private;
+       struct btrfs_block_group *block_group;
        struct mutex cache_writeout_mutex;
        struct list_head trimming_ranges;
 };