[5/8] inode: rename i_wb_list to i_io_list

Commit Message

Josef Bacik June 11, 2015, 7:41 p.m. UTC

From: Dave Chinner <[e-mail]>

There's a small consistency problem between the inode and writeback
naming. Writeback calls the "for IO" inode queues b_io and
b_more_io, but the inode calls these the "writeback list" or
i_wb_list. This makes it hard to an new "under writeback" list to
the inode, or call it an "under IO" list on the bdi because either
way we'll have writeback on IO and IO on writeback and it'll just be
confusing. I'm getting confused just writing this!

So, rename the inode "for IO" list variable to i_io_list so we can
add a new "writeback list" in a subsequent patch.

Signed-off-by: Dave Chinner <[e-mail]>
Signed-off-by: Josef Bacik <[e-mail]>
Reviewed-by: Jan Kara <[e-mail]>
---
 fs/fs-writeback.c  | 22 +++++++++++-----------
 fs/inode.c         |  6 +++---
 include/linux/fs.h |  2 +-
 mm/backing-dev.c   |  8 ++++----
 4 files changed, 19 insertions(+), 19 deletions(-)

Comments

Christoph Hellwig June 17, 2015, 12:06 p.m. UTC | #1

On Thu, Jun 11, 2015 at 03:41:10PM -0400, Josef Bacik wrote:
> From: Dave Chinner <[e-mail]>
> 
> There's a small consistency problem between the inode and writeback
> naming. Writeback calls the "for IO" inode queues b_io and
> b_more_io, but the inode calls these the "writeback list" or
> i_wb_list. This makes it hard to an new "under writeback" list to
> the inode, or call it an "under IO" list on the bdi because either
> way we'll have writeback on IO and IO on writeback and it'll just be
> confusing. I'm getting confused just writing this!
> 
> So, rename the inode "for IO" list variable to i_io_list so we can
> add a new "writeback list" in a subsequent patch.

Looks good,

Reviewed-by: Christoph Hellwig <[e-mail]>
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to [e-mail]
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Patch

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 04fbc8a..aa72536 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -96,7 +96,7 @@  EXPORT_SYMBOL_GPL(inode_to_bdi);
 
 static inline struct inode *wb_inode(struct list_head *head)
 {
-	return list_entry(head, struct inode, i_wb_list);
+	return list_entry(head, struct inode, i_io_list);
 }
 
 /*
@@ -205,7 +205,7 @@  void inode_wb_list_del(struct inode *inode)
 	struct backing_dev_info *bdi = inode_to_bdi(inode);
 
 	spin_lock(&bdi->wb.list_lock);
-	list_del_init(&inode->i_wb_list);
+	list_del_init(&inode->i_io_list);
 	spin_unlock(&bdi->wb.list_lock);
 }
 
@@ -228,7 +228,7 @@  static void redirty_tail(struct inode *inode, struct bdi_writeback *wb)
 		if (time_before(inode->dirtied_when, tail->dirtied_when))
 			inode->dirtied_when = jiffies;
 	}
-	list_move(&inode->i_wb_list, &wb->b_dirty);
+	list_move(&inode->i_io_list, &wb->b_dirty);
 }
 
 /*
@@ -237,7 +237,7 @@  static void redirty_tail(struct inode *inode, struct bdi_writeback *wb)
 static void requeue_io(struct inode *inode, struct bdi_writeback *wb)
 {
 	assert_spin_locked(&wb->list_lock);
-	list_move(&inode->i_wb_list, &wb->b_more_io);
+	list_move(&inode->i_io_list, &wb->b_more_io);
 }
 
 static void inode_sync_complete(struct inode *inode)
@@ -296,7 +296,7 @@  static int move_expired_inodes(struct list_head *delaying_queue,
 		if (older_than_this &&
 		    inode_dirtied_after(inode, *older_than_this))
 			break;
-		list_move(&inode->i_wb_list, &tmp);
+		list_move(&inode->i_io_list, &tmp);
 		moved++;
 		if (flags & EXPIRE_DIRTY_ATIME)
 			set_bit(__I_DIRTY_TIME_EXPIRED, &inode->i_state);
@@ -319,7 +319,7 @@  static int move_expired_inodes(struct list_head *delaying_queue,
 		list_for_each_prev_safe(pos, node, &tmp) {
 			inode = wb_inode(pos);
 			if (inode->i_sb == sb)
-				list_move(&inode->i_wb_list, dispatch_queue);
+				list_move(&inode->i_io_list, dispatch_queue);
 		}
 	}
 out:
@@ -471,10 +471,10 @@  static void requeue_inode(struct inode *inode, struct bdi_writeback *wb,
 		redirty_tail(inode, wb);
 	} else if (inode->i_state & I_DIRTY_TIME) {
 		inode->dirtied_when = jiffies;
-		list_move(&inode->i_wb_list, &wb->b_dirty_time);
+		list_move(&inode->i_io_list, &wb->b_dirty_time);
 	} else {
 		/* The inode is clean. Remove from writeback lists. */
-		list_del_init(&inode->i_wb_list);
+		list_del_init(&inode->i_io_list);
 	}
 }
 
@@ -616,7 +616,7 @@  writeback_single_inode(struct inode *inode, struct bdi_writeback *wb,
 	 * touch it. See comment above for explanation.
 	 */
 	if (!(inode->i_state & I_DIRTY_ALL))
-		list_del_init(&inode->i_wb_list);
+		list_del_init(&inode->i_io_list);
 	spin_unlock(&wb->list_lock);
 	inode_sync_complete(inode);
 out:
@@ -1343,9 +1343,9 @@  void __mark_inode_dirty(struct inode *inode, int flags)
 			if (dirtytime)
 				inode->dirtied_time_when = jiffies;
 			if (inode->i_state & (I_DIRTY_INODE | I_DIRTY_PAGES))
-				list_move(&inode->i_wb_list, &bdi->wb.b_dirty);
+				list_move(&inode->i_io_list, &bdi->wb.b_dirty);
 			else
-				list_move(&inode->i_wb_list,
+				list_move(&inode->i_io_list,
 					  &bdi->wb.b_dirty_time);
 			spin_unlock(&bdi->wb.list_lock);
 			trace_writeback_dirty_inode_enqueue(inode);
diff --git a/fs/inode.c b/fs/inode.c
index 12d58fa..c76a575 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -31,7 +31,7 @@ 
  * inode->i_sb->s_inode_list_lock protects:
  *   inode->i_sb->s_inodes, inode->i_sb_list
  * bdi->wb.list_lock protects:
- *   bdi->wb.b_{dirty,io,more_io,dirty_time}, inode->i_wb_list
+ *   bdi->wb.b_{dirty,io,more_io,dirty_time}, inode->i_io_list
  * inode_hash_lock protects:
  *   inode_hashtable, inode->i_hash
  *
@@ -355,7 +355,7 @@  void inode_init_once(struct inode *inode)
 	memset(inode, 0, sizeof(*inode));
 	INIT_HLIST_NODE(&inode->i_hash);
 	INIT_LIST_HEAD(&inode->i_devices);
-	INIT_LIST_HEAD(&inode->i_wb_list);
+	INIT_LIST_HEAD(&inode->i_io_list);
 	INIT_LIST_HEAD(&inode->i_lru);
 	address_space_init_once(&inode->i_data);
 	i_size_ordered_init(inode);
@@ -523,7 +523,7 @@  static void evict(struct inode *inode)
 	BUG_ON(!(inode->i_state & I_FREEING));
 	BUG_ON(!list_empty(&inode->i_lru));
 
-	if (!list_empty(&inode->i_wb_list))
+	if (!list_empty(&inode->i_io_list))
 		inode_wb_list_del(inode);
 
 	inode_sb_list_del(inode);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index ae23d35..f4d56cc 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -634,7 +634,7 @@  struct inode {
 	unsigned long		dirtied_time_when;
 
 	struct hlist_node	i_hash;
-	struct list_head	i_wb_list;	/* backing dev IO list */
+	struct list_head	i_io_list;	/* backing dev IO list */
 	struct list_head	i_lru;		/* inode LRU list */
 	struct list_head	i_sb_list;
 	union {
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 6dc4580..6e7a644 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -54,13 +54,13 @@  static int bdi_debug_stats_show(struct seq_file *m, void *v)
 
 	nr_dirty = nr_io = nr_more_io = nr_dirty_time = 0;
 	spin_lock(&wb->list_lock);
-	list_for_each_entry(inode, &wb->b_dirty, i_wb_list)
+	list_for_each_entry(inode, &wb->b_dirty, i_io_list)
 		nr_dirty++;
-	list_for_each_entry(inode, &wb->b_io, i_wb_list)
+	list_for_each_entry(inode, &wb->b_io, i_io_list)
 		nr_io++;
-	list_for_each_entry(inode, &wb->b_more_io, i_wb_list)
+	list_for_each_entry(inode, &wb->b_more_io, i_io_list)
 		nr_more_io++;
-	list_for_each_entry(inode, &wb->b_dirty_time, i_wb_list)
+	list_for_each_entry(inode, &wb->b_dirty_time, i_io_list)
 		if (inode->i_state & I_DIRTY_TIME)
 			nr_dirty_time++;
 	spin_unlock(&wb->list_lock);