linux-kernel - [PATCH 10/10] writeback: move inode_to_bdi() to include/linux/backing-dev.h

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Message-Id: <1416299848-22112-11-git-send-email-tj@kernel.org>
Date:	Tue, 18 Nov 2014 03:37:28 -0500
From:	Tejun Heo <tj@...nel.org>
To:	axboe@...nel.dk
Cc:	linux-kernel@...r.kernel.org, jack@...e.cz,
	Tejun Heo <tj@...nel.org>
Subject: [PATCH 10/10] writeback: move inode_to_bdi() to include/linux/backing-dev.h

inode_to_bdi() will be used by inline functions for the planned cgroup
writeback support.  Move it to include/linux/backing-dev.h.

This patch doesn't introduce any behavior changes.

Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: Jens Axboe <axboe@...nel.dk>
Cc: Jan Kara <jack@...e.cz>
---
 fs/fs-writeback.c           | 10 ----------
 include/linux/backing-dev.h | 10 ++++++++++
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 41c9f1e..5130895 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -66,16 +66,6 @@ int writeback_in_progress(struct backing_dev_info *bdi)
 }
 EXPORT_SYMBOL(writeback_in_progress);
 
-static inline struct backing_dev_info *inode_to_bdi(struct inode *inode)
-{
-	struct super_block *sb = inode->i_sb;
-
-	if (sb_is_blkdev_sb(sb))
-		return inode->i_mapping->backing_dev_info;
-
-	return sb->s_bdi;
-}
-
 static inline struct inode *wb_inode(struct list_head *head)
 {
 	return list_entry(head, struct inode, i_wb_list);
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index 918f5c9..3c6fd34 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -253,4 +253,14 @@ static inline int bdi_sched_wait(void *word)
 	return 0;
 }
 
+static inline struct backing_dev_info *inode_to_bdi(struct inode *inode)
+{
+	struct super_block *sb = inode->i_sb;
+
+	if (sb_is_blkdev_sb(sb))
+		return inode->i_mapping->backing_dev_info;
+
+	return sb->s_bdi;
+}
+
 #endif		/* _LINUX_BACKING_DEV_H */
-- 
1.9.3

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