btrfs: remove use btrfs_remove_free_space_cache instead of variant

We are calling __btrfs_remove_free_space_cache everywhere to cleanup the
block group free space, however we can just use
btrfs_remove_free_space_cache and pass in the block group in all of
these places.  Then we can remove __btrfs_remove_free_space_cache and
rename __btrfs_remove_free_space_cache_locked to
__btrfs_remove_free_space_cache.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/block-group.c

@@ -4110,7 +4110,7 @@ void btrfs_unfreeze_block_group(struct btrfs_block_group *block_group)
 		 * tasks trimming this block group have left 1 entry each one.
 		 * Free them if any.
 		 */
-		__btrfs_remove_free_space_cache(block_group->free_space_ctl);
+		btrfs_remove_free_space_cache(block_group);
 	}
 }
 

fs/btrfs/free-space-cache.c

@@ -48,8 +48,7 @@ static void bitmap_clear_bits(struct btrfs_free_space_ctl *ctl,
 			      struct btrfs_free_space *info, u64 offset,
 			      u64 bytes, bool update_stats);
 
-static void __btrfs_remove_free_space_cache_locked(
-				struct btrfs_free_space_ctl *ctl)
+static void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl)
 {
 	struct btrfs_free_space *info;
 	struct rb_node *node;
@@ -898,12 +897,8 @@ out:
 free_cache:
 	io_ctl_drop_pages(&io_ctl);
 
-	/*
-	 * We need to call the _locked variant so we don't try to update the
-	 * discard counters.
-	 */
 	spin_lock(&ctl->tree_lock);
-	__btrfs_remove_free_space_cache_locked(ctl);
+	__btrfs_remove_free_space_cache(ctl);
 	spin_unlock(&ctl->tree_lock);
 	goto out;
 }
@@ -3010,15 +3005,6 @@ static void __btrfs_return_cluster_to_free_space(
 	btrfs_put_block_group(block_group);
 }
 
-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->block_group)
-		btrfs_discard_update_discardable(ctl->block_group);
-	spin_unlock(&ctl->tree_lock);
-}
-
 void btrfs_remove_free_space_cache(struct btrfs_block_group *block_group)
 {
 	struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
@@ -3036,7 +3022,7 @@ void btrfs_remove_free_space_cache(struct btrfs_block_group *block_group)
 
 		cond_resched_lock(&ctl->tree_lock);
 	}
-	__btrfs_remove_free_space_cache_locked(ctl);
+	__btrfs_remove_free_space_cache(ctl);
 	btrfs_discard_update_discardable(block_group);
 	spin_unlock(&ctl->tree_lock);
 

fs/btrfs/free-space-cache.h

@@ -113,7 +113,6 @@ int btrfs_add_free_space_async_trimmed(struct btrfs_block_group *block_group,
 				       u64 bytenr, u64 size);
 int btrfs_remove_free_space(struct btrfs_block_group *block_group,
 			    u64 bytenr, u64 size);
-void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
 void btrfs_remove_free_space_cache(struct btrfs_block_group *block_group);
 bool btrfs_is_free_space_trimmed(struct btrfs_block_group *block_group);
 u64 btrfs_find_space_for_alloc(struct btrfs_block_group *block_group,

fs/btrfs/tests/btrfs-tests.c

@@ -243,7 +243,7 @@ void btrfs_free_dummy_block_group(struct btrfs_block_group *cache)
 {
 	if (!cache)
 		return;
-	__btrfs_remove_free_space_cache(cache->free_space_ctl);
+	btrfs_remove_free_space_cache(cache);
 	kfree(cache->free_space_ctl);
 	kfree(cache);
 }

fs/btrfs/tests/free-space-tests.c

@@ -82,7 +82,7 @@ static int test_extents(struct btrfs_block_group *cache)
 	}
 
 	/* Cleanup */
-	__btrfs_remove_free_space_cache(cache->free_space_ctl);
+	btrfs_remove_free_space_cache(cache);
 
 	return 0;
 }
@@ -149,7 +149,7 @@ static int test_bitmaps(struct btrfs_block_group *cache, u32 sectorsize)
 		return -1;
 	}
 
-	__btrfs_remove_free_space_cache(cache->free_space_ctl);
+	btrfs_remove_free_space_cache(cache);
 
 	return 0;
 }
@@ -230,7 +230,7 @@ static int test_bitmaps_and_extents(struct btrfs_block_group *cache,
 		return -1;
 	}
 
-	__btrfs_remove_free_space_cache(cache->free_space_ctl);
+	btrfs_remove_free_space_cache(cache);
 
 	/* Now with the extent entry offset into the bitmap */
 	ret = test_add_free_space_entry(cache, SZ_4M, SZ_4M, 1);
@@ -266,7 +266,7 @@ static int test_bitmaps_and_extents(struct btrfs_block_group *cache,
 	 *      [ bitmap ]
 	 *        [ del ]
 	 */
-	__btrfs_remove_free_space_cache(cache->free_space_ctl);
+	btrfs_remove_free_space_cache(cache);
 	ret = test_add_free_space_entry(cache, bitmap_offset + SZ_4M, SZ_4M, 1);
 	if (ret) {
 		test_err("couldn't add bitmap %d", ret);
@@ -291,7 +291,7 @@ static int test_bitmaps_and_extents(struct btrfs_block_group *cache,
 		return -1;
 	}
 
-	__btrfs_remove_free_space_cache(cache->free_space_ctl);
+	btrfs_remove_free_space_cache(cache);
 
 	/*
 	 * This blew up before, we have part of the free space in a bitmap and
@@ -317,7 +317,7 @@ static int test_bitmaps_and_extents(struct btrfs_block_group *cache,
 		return ret;
 	}
 
-	__btrfs_remove_free_space_cache(cache->free_space_ctl);
+	btrfs_remove_free_space_cache(cache);
 	return 0;
 }
 
@@ -629,7 +629,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group *cache,
 	if (ret)
 		return ret;
 
-	__btrfs_remove_free_space_cache(cache->free_space_ctl);
+	btrfs_remove_free_space_cache(cache);
 
 	/*
 	 * Now test a similar scenario, but where our extent entry is located
@@ -819,7 +819,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group *cache,
 		return ret;
 
 	cache->free_space_ctl->op = orig_free_space_ops;
-	__btrfs_remove_free_space_cache(cache->free_space_ctl);
+	btrfs_remove_free_space_cache(cache);
 
 	return 0;
 }
@@ -868,7 +868,7 @@ static int test_bytes_index(struct btrfs_block_group *cache, u32 sectorsize)
 	}
 
 	/* Now validate bitmaps do the correct thing. */
-	__btrfs_remove_free_space_cache(cache->free_space_ctl);
+	btrfs_remove_free_space_cache(cache);
 	for (i = 0; i < 2; i++) {
 		offset = i * BITS_PER_BITMAP * sectorsize;
 		bytes = (i + 1) * SZ_1M;
@@ -891,7 +891,7 @@ static int test_bytes_index(struct btrfs_block_group *cache, u32 sectorsize)
 	}
 
 	/* Now validate bitmaps with different ->max_extent_size. */
-	__btrfs_remove_free_space_cache(cache->free_space_ctl);
+	btrfs_remove_free_space_cache(cache);
 	orig_free_space_ops = cache->free_space_ctl->op;
 	cache->free_space_ctl->op = &test_free_space_ops;
 
@@ -998,7 +998,7 @@ static int test_bytes_index(struct btrfs_block_group *cache, u32 sectorsize)
 	}
 
 	cache->free_space_ctl->op = orig_free_space_ops;
-	__btrfs_remove_free_space_cache(cache->free_space_ctl);
+	btrfs_remove_free_space_cache(cache);
 	return 0;
 }