[PATCH 2/3] btrfs: rename btrfs_block_group::count

[Anand Jain <anand.jain@oracle.com>]

The name 'count' is a very commonly used name. It is often difficult to
review the code to check if there is any leak. So rename it to
'bg_count', which is unique enough.

This patch also serves as a preparatory patch to either make sure
btrfs_get_block_group() is used instead of open coded the same or just
open code every where as btrfs_get_block_group() is a one-liner.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
 fs/btrfs/block-group.c      | 8 ++++----
 fs/btrfs/block-group.h      | 2 +-
 fs/btrfs/free-space-cache.c | 4 ++--
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index 31ca2cfb7e3e..8111f6750063 100644
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -118,12 +118,12 @@ u64 btrfs_get_alloc_profile(struct btrfs_fs_info *fs_info, u64 orig_flags)
 
 void btrfs_get_block_group(struct btrfs_block_group *cache)
 {
-	atomic_inc(&cache->count);
+	atomic_inc(&cache->bg_count);
 }
 
 void btrfs_put_block_group(struct btrfs_block_group *cache)
 {
-	if (atomic_dec_and_test(&cache->count)) {
+	if (atomic_dec_and_test(&cache->bg_count)) {
 		WARN_ON(cache->pinned > 0);
 		WARN_ON(cache->reserved > 0);
 
@@ -1805,7 +1805,7 @@ static struct btrfs_block_group *btrfs_create_block_group_cache(
 
 	cache->discard_index = BTRFS_DISCARD_INDEX_UNUSED;
 
-	atomic_set(&cache->count, 1);
+	atomic_set(&cache->bg_count, 1);
 	spin_lock_init(&cache->lock);
 	init_rwsem(&cache->data_rwsem);
 	INIT_LIST_HEAD(&cache->list);
@@ -3379,7 +3379,7 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info)
 		ASSERT(list_empty(&block_group->dirty_list));
 		ASSERT(list_empty(&block_group->io_list));
 		ASSERT(list_empty(&block_group->bg_list));
-		ASSERT(atomic_read(&block_group->count) == 1);
+		ASSERT(atomic_read(&block_group->bg_count) == 1);
 		btrfs_put_block_group(block_group);
 
 		spin_lock(&info->block_group_cache_lock);
diff --git a/fs/btrfs/block-group.h b/fs/btrfs/block-group.h
index b6ee70a039c7..f0ef8be08747 100644
--- a/fs/btrfs/block-group.h
+++ b/fs/btrfs/block-group.h
@@ -115,7 +115,7 @@ struct btrfs_block_group {
 	struct list_head list;
 
 	/* Usage count */
-	atomic_t count;
+	atomic_t bg_count;
 
 	/*
 	 * List of struct btrfs_free_clusters for this block group.
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 1bf08c855edb..169b1117c1a3 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -2925,7 +2925,7 @@ void btrfs_return_cluster_to_free_space(
 		spin_unlock(&cluster->lock);
 		return;
 	}
-	atomic_inc(&block_group->count);
+	atomic_inc(&block_group->bg_count);
 	spin_unlock(&cluster->lock);
 
 	ctl = block_group->free_space_ctl;
@@ -3355,7 +3355,7 @@ int btrfs_find_space_cluster(struct btrfs_block_group *block_group,
 		list_del_init(&entry->list);
 
 	if (!ret) {
-		atomic_inc(&block_group->count);
+		atomic_inc(&block_group->bg_count);
 		list_add_tail(&cluster->block_group_list,
 			      &block_group->cluster_list);
 		cluster->block_group = block_group;
-- 
2.25.1