[PATCH] md: remove redudent code

[Yuanhan Liu <yuanhan.liu@linux.intel.com>]

The code does nothing but repating assigning sb->sb_csum with original
value.

Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
---
 drivers/md/md.c |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 0bd44e3..f2d799a 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1439,15 +1439,12 @@ super_90_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors)
 
 static __le32 calc_sb_1_csum(struct mdp_superblock_1 * sb)
 {
-	__le32 disk_csum;
 	u32 csum;
 	unsigned long long newcsum;
 	int size = 256 + le32_to_cpu(sb->max_dev)*2;
 	__le32 *isuper = (__le32*)sb;
 	int i;
 
-	disk_csum = sb->sb_csum;
-	sb->sb_csum = 0;
 	newcsum = 0;
 	for (i=0; size>=4; size -= 4 )
 		newcsum += le32_to_cpu(*isuper++);
@@ -1456,7 +1453,6 @@ static __le32 calc_sb_1_csum(struct mdp_superblock_1 * sb)
 		newcsum += le16_to_cpu(*(__le16*) isuper);
 
 	csum = (newcsum & 0xffffffff) + (newcsum >> 32);
-	sb->sb_csum = disk_csum;
 	return cpu_to_le32(csum);
 }
 
-- 
1.7.7.6