From: Filipe Manana fdmanana@suse.com

mainline inclusion from mainline-v6.11-rc1 commit 119474bdbac0858053cf367c8c932dd5c4bb4e85 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IARX0N

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...

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There are no callers of btrfs_lookup_extent_info() that pass a NULL value for the transaction handle argument, so there's no point in having special logic to deal with the NULL. The last caller that passed a NULL value was removed in commit 19b546d7a1b2 ("btrfs: relocation: Use btrfs_find_all_leafs to locate data extent parent tree leaves").

So remove the NULL handling from btrfs_lookup_extent_info().

Reported-by: kernel test robot lkp@intel.com Reported-by: Dan Carpenter dan.carpenter@linaro.org Closes: https://lore.kernel.org/r/202409271612.ikY68CAg-lkp@intel.com/ 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 Signed-off-by: Yifan Qiao qiaoyifan4@huawei.com --- fs/btrfs/extent-tree.c | 16 ++-------------- 1 file changed, 2 insertions(+), 14 deletions(-)

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 9bf1e4ac4de0..39afb1c46907 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -124,11 +124,6 @@ int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, if (!path) return -ENOMEM;

- if (!trans) { - path->skip_locking = 1; - path->search_commit_root = 1; - } - search_again: key.objectid = bytenr; key.offset = offset; @@ -164,11 +159,7 @@ int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, btrfs_err(fs_info, "unexpected extent item size, has %u expect >= %zu", item_size, sizeof(*ei)); - if (trans) - btrfs_abort_transaction(trans, ret); - else - btrfs_handle_fs_error(fs_info, ret, NULL); - + btrfs_abort_transaction(trans, ret); goto out_free; }

@@ -189,9 +180,6 @@ int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, ret = 0; }

- if (!trans) - goto out; - delayed_refs = &trans->transaction->delayed_refs; spin_lock(&delayed_refs->lock); head = btrfs_find_delayed_ref_head(delayed_refs, bytenr); @@ -231,7 +219,7 @@ int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, mutex_unlock(&head->mutex); } spin_unlock(&delayed_refs->lock); -out: + WARN_ON(num_refs == 0); if (refs) *refs = num_refs;