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btrfs: simplify csum list release at btrfs_put_ordered_extent()

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Instead of extracting each element by grabbing the list's first member in
a local list_head variable, then extracting the csum with list_entry() and
iterating with a while loop checking for list emptyness, use the iteration
helper list_for_each_entry_safe(). This also removes the need to delete
elements from the list with list_del() since the ordered extent is freed
immediately after.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2025-05-01 13:21:34 +01:00 committed by David Sterba
parent 4cde0724c9
commit 58fe389a2a
1 changed files with 4 additions and 8 deletions
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12
fs/btrfs/ordered-data.c
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@ -607,23 +607,19 @@ bool btrfs_dec_test_ordered_pending(struct btrfs_inode *inode,
*/
void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry)
{
struct list_head *cur;
struct btrfs_ordered_sum *sum;
trace_btrfs_ordered_extent_put(entry->inode, entry);
if (refcount_dec_and_test(&entry->refs)) {
struct btrfs_ordered_sum *sum;
struct btrfs_ordered_sum *tmp;
ASSERT(list_empty(&entry->root_extent_list));
ASSERT(list_empty(&entry->log_list));
ASSERT(RB_EMPTY_NODE(&entry->rb_node));
if (entry->inode)
btrfs_add_delayed_iput(entry->inode);
while (!list_empty(&entry->list)) {
cur = entry->list.next;
sum = list_entry(cur, struct btrfs_ordered_sum, list);
list_del(&sum->list);
list_for_each_entry_safe(sum, tmp, &entry->list, list)
kvfree(sum);
}
kmem_cache_free(btrfs_ordered_extent_cache, entry);
}
}