dm: fix some sparse warnings and whitespace in dax methods

Eliminate these sparse warnings:
drivers/md/dm.c:1062:9: warning: context imbalance in 'dm_dax_direct_access' - unexpected unlock
drivers/md/dm.c:1086:9: warning: context imbalance in 'dm_dax_copy_from_iter' - unexpected unlock

Signed-off-by: Mike Snitzer <snitzer@redhat.com>

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 4ea404d..0a7b010 100644 (file)
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1020,7 +1020,8 @@ int dm_set_target_max_io_len(struct dm_target *ti, sector_t len)
 EXPORT_SYMBOL_GPL(dm_set_target_max_io_len);
 
 static struct dm_target *dm_dax_get_live_target(struct mapped_device *md,
-               sector_t sector, int *srcu_idx)
+                                               sector_t sector, int *srcu_idx)
+       __acquires(md->io_barrier)
 {
        struct dm_table *map;
        struct dm_target *ti;
@@ -1037,7 +1038,7 @@ static struct dm_target *dm_dax_get_live_target(struct mapped_device *md,
 }
 
 static long dm_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
-               long nr_pages, void **kaddr, pfn_t *pfn)
+                                long nr_pages, void **kaddr, pfn_t *pfn)
 {
        struct mapped_device *md = dax_get_private(dax_dev);
        sector_t sector = pgoff * PAGE_SECTORS;
@@ -1065,7 +1066,7 @@ static long dm_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
 }
 
 static size_t dm_dax_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff,
-               void *addr, size_t bytes, struct iov_iter *i)
+                                   void *addr, size_t bytes, struct iov_iter *i)
 {
        struct mapped_device *md = dax_get_private(dax_dev);
        sector_t sector = pgoff * PAGE_SECTORS;