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btrfs: add unlikely to critical error in btrfs_extend_item()

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It's not expected to get a data size less than the leaf's free space,
which would lead to a leaf dump and BUG(), so tag the if statement's
expression as unlikely, hinting the compiler to potentially generate
better code.

Reviewed-by: Qu Wenruo <wqu@suse.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 2025-11-13 13:04:13 +00:00 committed by David Sterba
parent 86d3dc812f
commit fad159f69e
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/ctree.c
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@ -4106,7 +4106,7 @@ void btrfs_extend_item(struct btrfs_trans_handle *trans,
nritems = btrfs_header_nritems(leaf);
data_end = leaf_data_end(leaf);
if (btrfs_leaf_free_space(leaf) < data_size) {
if (unlikely(btrfs_leaf_free_space(leaf) < data_size)) {
btrfs_print_leaf(leaf);
BUG();
}