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There're only two callers that set @return_any to 1 and both of them is unnecessary. So @return_any and related logic could be removed. The last patch is cleanup for btrfs_prev_leaf(). Callers expect a valid p->slots[0] to read the item's key. So make sure btrfs_prev_leaf() return a valid p->slots[0] and remove related checks in callers. No functional changes. Changelog: V2: - Add assertion in btrfs_search_slot_for_read() to prevent misuse - Remove unnecessary call btrfs_prev_leaf in btrfs_search_slot_for_read() - Add details about changes in patch 4 Sun YangKai (4): btrfs: don't set @return_any for btrfs_search_slot_for_read in btrfs_read_qgroup_config btrfs: don't set return_any @return_any for btrfs_search_slot_for_read in get_last_extent() btrfs: cleanup btrfs_search_slot_for_read() btrfs: ctree: cleanup btrfs_prev_leaf() fs/btrfs/ctree.c | 143 +++++++------------------------------ fs/btrfs/ctree.h | 3 +- fs/btrfs/free-space-tree.c | 2 +- fs/btrfs/qgroup.c | 10 +-- fs/btrfs/send.c | 22 +++--- 5 files changed, 42 insertions(+), 138 deletions(-) -- 2.51.2