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>

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 0b3064079fa530e9c6d68739d931cff50af069a3..db80ce9eb1d07896fb3ddd5f545ed8876dc8b2fa 100644 (file)
--- 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 e260d9a32c218576a21b9d164a241ce7e9e6c1da..19aab50c3b8eadac84610df78b7bbc5fa5b5a2b7 100644 (file)
--- 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 */