Merge tag 'md/4.6-rc6-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

Pull MD fixes from Shaohua Li:
 "This update includes several trival fixes.  The only important one is
  to fix MD bio merge, which has big performance impact"

* tag 'md/4.6-rc6-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  raid5: delete unnecessary warnning
  MD: make bio mergeable
  md/raid0: remove empty line printk from dump_zones
  md/raid0: fix uninitialized variable bug

3 files changed, 3 insertions, 3 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 194580fba7fd..14d3b37944df 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -284,6 +284,8 @@ static blk_qc_t md_make_request(struct request_queue *q, struct bio *bio)
          * go away inside make_request
          */
         sectors = bio_sectors(bio);
+        /* bio could be mergeable after passing to underlayer */
+        bio->bi_rw &= ~REQ_NOMERGE;
         mddev->pers->make_request(mddev, bio);
 
         cpu = part_stat_lock();
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 2ea12c6bf659..34783a3c8b3c 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -70,7 +70,6 @@ static void dump_zones(struct mddev *mddev)
                         (unsigned long long)zone_size>>1);
                 zone_start = conf->strip_zone[j].zone_end;
         }
-        printk(KERN_INFO "\n");
 }
 
 static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf)
@@ -85,6 +84,7 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf)
         struct r0conf *conf = kzalloc(sizeof(*conf), GFP_KERNEL);
         unsigned short blksize = 512;
 
+        *private_conf = ERR_PTR(-ENOMEM);
         if (!conf)
                 return -ENOMEM;
         rdev_for_each(rdev1, mddev) {
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 8ab8b65e1741..e48c262ce032 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3502,8 +3502,6 @@ returnbi:
                                 dev = &sh->dev[i];
                         } else if (test_bit(R5_Discard, &dev->flags))
                                 discard_pending = 1;
-                        WARN_ON(test_bit(R5_SkipCopy, &dev->flags));
-                        WARN_ON(dev->page != dev->orig_page);
                 }
 
         r5l_stripe_write_finished(sh);