Hi, The 1st patch fixes one use-after-free on cached last_lookup partition. The other 3 patches optimizes partition uses in IO path. V2: - add comment, use part_to_disk() to retrieve disk instead of adding one field to hd_struct - don't put part in blk_account_io_merge Ming Lei (4): block: fix use-after-free on cached last_lookup partition block: only define 'nr_sects_seq' in hd_part for 32bit SMP block: re-organize fields of 'struct hd_part' block: don't hold part0's refcount in IO path block/blk-core.c | 15 ++------------- block/blk-merge.c | 3 ++- block/genhd.c | 17 +++++++++++++---- block/partitions/core.c | 14 ++++++++++++-- include/linux/genhd.h | 24 +++++++++++++++++------- 5 files changed, 46 insertions(+), 27 deletions(-) Cc: Yufen Yu <yuyufen@xxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx> Cc: Hou Tao <houtao1@xxxxxxxxxx> -- 2.25.2
