fs: use list_for_each_entry_reverse and kill sb_entry

Use list_for_each_entry_reverse for super_blocks list and remove
unused sb_entry macro.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 2 insertions, 6 deletions

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 0b3064079fa5..db80ce9eb1d0 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -515,8 +515,7 @@ writeback_inodes(struct writeback_control *wbc)
         might_sleep();
         spin_lock(&sb_lock);
 restart:
-        sb = sb_entry(super_blocks.prev);
-        for (; sb != sb_entry(&super_blocks); sb = sb_entry(sb->s_list.prev)) {
+        list_for_each_entry_reverse(sb, &super_blocks, s_list) {
                 if (sb_has_dirty_inodes(sb)) {
                         /* we're making our own get_super here */
                         sb->s_count++;
@@ -581,10 +580,8 @@ static void set_sb_syncing(int val)
 {
         struct super_block *sb;
         spin_lock(&sb_lock);
-        sb = sb_entry(super_blocks.prev);
-        for (; sb != sb_entry(&super_blocks); sb = sb_entry(sb->s_list.prev)) {
+        list_for_each_entry_reverse(sb, &super_blocks, s_list)
                 sb->s_syncing = val;
-        }
         spin_unlock(&sb_lock);
 }
 
diff --git a/include/linux/fs.h b/include/linux/fs.h
index e260d9a32c21..19aab50c3b8e 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -977,7 +977,6 @@ extern int send_sigurg(struct fown_struct *fown);
 extern struct list_head super_blocks;
 extern spinlock_t sb_lock;
 
-#define sb_entry(list)  list_entry((list), struct super_block, s_list)
 #define S_BIAS (1<<30)
 struct super_block {
         struct list_head        s_list;         /* Keep this first */