[PATCH block/for-next v2 04/16] mtd: block2mtd: use new helper to get inode from block_device

[Yu Kuai <yukuai1@xxxxxxxxxxxxxxx>]

From: Yu Kuai <yukuai3@xxxxxxxxxx>

Which is more efficiency, and also prepare to remove the field
'bd_inode' from block_device.

Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
 drivers/mtd/devices/block2mtd.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c
index aa44a23ec045..d4f7a4339a70 100644
--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -56,7 +56,7 @@ static struct page *page_read(struct address_space *mapping, pgoff_t index)
 static int _block2mtd_erase(struct block2mtd_dev *dev, loff_t to, size_t len)
 {
 	struct address_space *mapping =
-				dev->bdev_handle->bdev->bd_inode->i_mapping;
+				bdev_inode(dev->bdev_handle->bdev)->i_mapping;
 	struct page *page;
 	pgoff_t index = to >> PAGE_SHIFT;	// page index
 	int pages = len >> PAGE_SHIFT;
@@ -107,7 +107,7 @@ static int block2mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
 {
 	struct block2mtd_dev *dev = mtd->priv;
 	struct address_space *mapping =
-				dev->bdev_handle->bdev->bd_inode->i_mapping;
+				bdev_inode(dev->bdev_handle->bdev)->i_mapping;
 	struct page *page;
 	pgoff_t index = from >> PAGE_SHIFT;
 	int offset = from & (PAGE_SIZE-1);
@@ -143,7 +143,7 @@ static int _block2mtd_write(struct block2mtd_dev *dev, const u_char *buf,
 {
 	struct page *page;
 	struct address_space *mapping =
-				dev->bdev_handle->bdev->bd_inode->i_mapping;
+				bdev_inode(dev->bdev_handle->bdev)->i_mapping;
 	pgoff_t index = to >> PAGE_SHIFT;	// page index
 	int offset = to & ~PAGE_MASK;	// page offset
 	int cpylen;
@@ -212,7 +212,7 @@ static void block2mtd_free_device(struct block2mtd_dev *dev)
 
 	if (dev->bdev_handle) {
 		invalidate_mapping_pages(
-			dev->bdev_handle->bdev->bd_inode->i_mapping, 0, -1);
+			bdev_inode(dev->bdev_handle->bdev)->i_mapping, 0, -1);
 		bdev_release(dev->bdev_handle);
 	}
 
@@ -295,7 +295,7 @@ static struct block2mtd_dev *add_device(char *devname, int erase_size,
 		goto err_free_block2mtd;
 	}
 
-	if ((long)bdev->bd_inode->i_size % erase_size) {
+	if ((long)bdev_inode(bdev)->i_size % erase_size) {
 		pr_err("erasesize must be a divisor of device size\n");
 		goto err_free_block2mtd;
 	}
@@ -313,7 +313,7 @@ static struct block2mtd_dev *add_device(char *devname, int erase_size,
 
 	dev->mtd.name = name;
 
-	dev->mtd.size = bdev->bd_inode->i_size & PAGE_MASK;
+	dev->mtd.size = bdev_inode(bdev)->i_size & PAGE_MASK;
 	dev->mtd.erasesize = erase_size;
 	dev->mtd.writesize = 1;
 	dev->mtd.writebufsize = PAGE_SIZE;
-- 
2.39.2