Merge git://git.infradead.org/mtd-2.6

[pandora-kernel.git] / drivers / md / dm-table.c

diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 73326e7..61f4414 100644 (file)
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -316,29 +316,12 @@ static inline int check_space(struct dm_table *t)
  */
 static int lookup_device(const char *path, dev_t *dev)
 {
-       int r;
-       struct nameidata nd;
-       struct inode *inode;
-
-       if ((r = path_lookup(path, LOOKUP_FOLLOW, &nd)))
-               return r;
-
-       inode = nd.path.dentry->d_inode;
-       if (!inode) {
-               r = -ENOENT;
-               goto out;
-       }
-
-       if (!S_ISBLK(inode->i_mode)) {
-               r = -ENOTBLK;
-               goto out;
-       }
-
-       *dev = inode->i_rdev;
-
- out:
-       path_put(&nd.path);
-       return r;
+       struct block_device *bdev = lookup_bdev(path);
+       if (IS_ERR(bdev))
+               return PTR_ERR(bdev);
+       *dev = bdev->bd_dev;
+       bdput(bdev);
+       return 0;
 }
 
 /*
@@ -506,14 +489,13 @@ void dm_set_device_limits(struct dm_target *ti, struct block_device *bdev)
        rs->max_sectors =
                min_not_zero(rs->max_sectors, q->max_sectors);
 
-       /* FIXME: Device-Mapper on top of RAID-0 breaks because DM
-        *        currently doesn't honor MD's merge_bvec_fn routine.
-        *        In this case, we'll force DM to use PAGE_SIZE or
-        *        smaller I/O, just to be safe. A better fix is in the
-        *        works, but add this for the time being so it will at
-        *        least operate correctly.
+       /*
+        * Check if merge fn is supported.
+        * If not we'll force DM to use PAGE_SIZE or
+        * smaller I/O, just to be safe.
         */
-       if (q->merge_bvec_fn)
+
+       if (q->merge_bvec_fn && !ti->type->merge)
                rs->max_sectors =
                        min_not_zero(rs->max_sectors,
                                     (unsigned int) (PAGE_SIZE >> 9));
@@ -873,13 +855,11 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q)
        q->max_hw_sectors = t->limits.max_hw_sectors;
        q->seg_boundary_mask = t->limits.seg_boundary_mask;
        q->bounce_pfn = t->limits.bounce_pfn;
-       /* XXX: the below will probably go bug. must ensure there can be no
-        * concurrency on queue_flags, and use the unlocked versions...
-        */
+
        if (t->limits.no_cluster)
-               queue_flag_clear(QUEUE_FLAG_CLUSTER, q);
+               queue_flag_clear_unlocked(QUEUE_FLAG_CLUSTER, q);
        else
-               queue_flag_set(QUEUE_FLAG_CLUSTER, q);
+               queue_flag_set_unlocked(QUEUE_FLAG_CLUSTER, q);
 
 }