f2fs: introduce F2FS_I_SB, F2FS_M_SB, and F2FS_P_SB

This patch adds three inline functions to clean up dirty casting codes.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 7 insertions, 11 deletions

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index ec3b7a5381fa..cb5cb4ca1814 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -151,8 +151,7 @@ out:
 static int f2fs_write_meta_page(struct page *page,
                                 struct writeback_control *wbc)
 {
-        struct inode *inode = page->mapping->host;
-        struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+        struct f2fs_sb_info *sbi = F2FS_P_SB(page);
 
         trace_f2fs_writepage(page, META);
 
@@ -177,7 +176,7 @@ redirty_out:
 static int f2fs_write_meta_pages(struct address_space *mapping,
                                 struct writeback_control *wbc)
 {
-        struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
+        struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
         long diff, written;
 
         trace_f2fs_writepages(mapping->host, wbc, META);
@@ -259,15 +258,12 @@ continue_unlock:
 
 static int f2fs_set_meta_page_dirty(struct page *page)
 {
-        struct address_space *mapping = page->mapping;
-        struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
-
         trace_f2fs_set_page_dirty(page, META);
 
         SetPageUptodate(page);
         if (!PageDirty(page)) {
                 __set_page_dirty_nobuffers(page);
-                inc_page_count(sbi, F2FS_DIRTY_META);
+                inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
                 return 1;
         }
         return 0;
@@ -619,7 +615,7 @@ fail_no_cp:
 
 static int __add_dirty_inode(struct inode *inode, struct dir_inode_entry *new)
 {
-        struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+        struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 
         if (is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR))
                 return -EEXIST;
@@ -633,7 +629,7 @@ static int __add_dirty_inode(struct inode *inode, struct dir_inode_entry *new)
 
 void set_dirty_dir_page(struct inode *inode, struct page *page)
 {
-        struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+        struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
         struct dir_inode_entry *new;
         int ret = 0;
 
@@ -656,7 +652,7 @@ void set_dirty_dir_page(struct inode *inode, struct page *page)
 
 void add_dirty_dir_inode(struct inode *inode)
 {
-        struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+        struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
         struct dir_inode_entry *new =
                         f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
         int ret = 0;
@@ -674,7 +670,7 @@ void add_dirty_dir_inode(struct inode *inode)
 
 void remove_dirty_dir_inode(struct inode *inode)
 {
-        struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+        struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
         struct dir_inode_entry *entry;
 
         if (!S_ISDIR(inode->i_mode))