md/raid5: For stripe with R5_ReadNoMerge, we replace REQ_FLUSH with REQ_NOMERGE.
authormajianpeng <majianpeng@gmail.com>
Thu, 14 Nov 2013 04:16:19 +0000 (15:16 +1100)
committerNeilBrown <neilb@suse.de>
Tue, 19 Nov 2013 04:19:18 +0000 (15:19 +1100)
For R5_ReadNoMerge,it mean this bio can't merge with other bios or
request.It used REQ_FLUSH to achieve this. But REQ_NOMERGE can do the
same work.

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
drivers/md/raid5.c

Simple merge