Currently the function uses 2 goto labels to properly handle allocation
failures. This could be simplified by simply re-arranging the code so
that allocations are the in the beginning of the function. This allows
to use simple return statements. No function changes.
Signed-off-by: Nikolay Borisov <nborisov@xxxxxxxx>
Suggested-by: Su Yue <suy.fnst@xxxxxxxxxxxxxx>
Suggested-by: David Sterba <dsterba@xxxxxxxx>
---
fs/btrfs/delayed-ref.c | 35 +++++++++++++++++------------------
1 file changed, 17 insertions(+), 18 deletions(-)
diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index 03dec673d12a..c2c2634693e1 100644
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -730,27 +730,33 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
if (!ref)
return -ENOMEM;
+ head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);
+ if (!head_ref) {
+ kmem_cache_free(btrfs_delayed_tree_ref_cachep, ref);
+ return -ENOMEM;
+ }
+
+ if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) &&
+ is_fstree(ref_root)) {
+ record = kmalloc(sizeof(*record), GFP_NOFS);
+ if (!record) {
+ kmem_cache_free(btrfs_delayed_tree_ref_cachep, ref);
+ kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);
+ return -ENOMEM;
+ }
+ }
+
if (parent)
ref_type = BTRFS_SHARED_BLOCK_REF_KEY;
else
ref_type = BTRFS_TREE_BLOCK_REF_KEY;
+
init_delayed_ref_common(fs_info, &ref->node, bytenr, num_bytes,
ref_root, action, ref_type);
ref->root = ref_root;
ref->parent = parent;
ref->level = level;
- head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);
- if (!head_ref)
- goto free_ref;
-
- if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) &&
- is_fstree(ref_root)) {
- record = kmalloc(sizeof(*record), GFP_NOFS);
- if (!record)
- goto free_head_ref;
- }
-
init_delayed_ref_head(head_ref, record, bytenr, num_bytes,
ref_root, 0, action, false, is_system);
head_ref->extent_op = extent_op;
@@ -779,13 +785,6 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
btrfs_qgroup_trace_extent_post(fs_info, record);
return 0;
-
-free_head_ref:
- kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);
-free_ref:
- kmem_cache_free(btrfs_delayed_tree_ref_cachep, ref);
-
- return -ENOMEM;
}
/*
--
2.7.4
--
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