f2fs: introduce F2FS_INODE macro to get f2fs_inode

This patch introduces F2FS_INODE that returns struct f2fs_inode * from the inode
page.
By using this macro, we can remove unnecessary casting codes like below.

   struct f2fs_inode *ri = &F2FS_NODE(inode_page)->i;
-> struct f2fs_inode *ri = F2FS_INODE(inode_page);

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

1 files changed, 2 insertions, 6 deletions

diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index d0eaa9faeca0..a91f45177cd9 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -67,7 +67,6 @@ static int do_read_inode(struct inode *inode)
         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
         struct f2fs_inode_info *fi = F2FS_I(inode);
         struct page *node_page;
-        struct f2fs_node *rn;
         struct f2fs_inode *ri;
 
         /* Check if ino is within scope */
@@ -81,8 +80,7 @@ static int do_read_inode(struct inode *inode)
         if (IS_ERR(node_page))
                 return PTR_ERR(node_page);
 
-        rn = F2FS_NODE(node_page);
-        ri = &(rn->i);
+        ri = F2FS_INODE(node_page);
 
         inode->i_mode = le16_to_cpu(ri->i_mode);
         i_uid_write(inode, le32_to_cpu(ri->i_uid));
@@ -175,13 +173,11 @@ bad_inode:
 
 void update_inode(struct inode *inode, struct page *node_page)
 {
-        struct f2fs_node *rn;
         struct f2fs_inode *ri;
 
         f2fs_wait_on_page_writeback(node_page, NODE, false);
 
-        rn = F2FS_NODE(node_page);
-        ri = &(rn->i);
+        ri = F2FS_INODE(node_page);
 
         ri->i_mode = cpu_to_le16(inode->i_mode);
         ri->i_advise = F2FS_I(inode)->i_advise;