Hi, The 1st patch fixes one use-after-free on cached last_lookup partition. The other 3 patches optimizes partition uses in IO path. 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/genhd.c | 7 +++++-- block/partition-generic.c | 12 ++++++++++-- include/linux/genhd.h | 25 ++++++++++++++++++------- 4 files changed, 35 insertions(+), 24 deletions(-) Cc: Yufen Yu <yuyufen@xxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx> Cc: Hou Tao <houtao1@xxxxxxxxxx> -- 2.20.1
