handle some bugs for REQ_NOMERGE.

This patch set mainly handle some bugs for REQ_NOMERGE.

Jianpeng Ma (3):
block: Add REQ_NOMERGE into REQ_COMMON_MASK
block: Check bio can merge before call attempt_plug_merge. md/raid5: For stripe with R5_ReadNoMerge, we replace REQ_FLUSH with
REQ_NOMERGE.

 block/blk-core.c          | 2 +-
 drivers/md/raid5.c        | 2 +-
 include/linux/blk_types.h | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

1.8.4