[PATCH -next] writeback: Cleanup inode_to_wb_is_valid()

[Xiu Jianfeng <xiujianfeng@huawei.com>]

inode_to_wb_is_valid() is no longer used since commit fe55d563d417
("remove inode_congested()"), remove it.

Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
---
 include/linux/backing-dev.h | 17 -----------------
 1 file changed, 17 deletions(-)

diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index d452071db572..f9f14e385582 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -235,18 +235,6 @@ wb_get_create_current(struct backing_dev_info *bdi, gfp_t gfp)
 	return wb;
 }
 
-/**
- * inode_to_wb_is_valid - test whether an inode has a wb associated
- * @inode: inode of interest
- *
- * Returns %true if @inode has a wb associated.  May be called without any
- * locking.
- */
-static inline bool inode_to_wb_is_valid(struct inode *inode)
-{
-	return inode->i_wb;
-}
-
 /**
  * inode_to_wb - determine the wb of an inode
  * @inode: inode of interest
@@ -345,11 +333,6 @@ wb_get_create_current(struct backing_dev_info *bdi, gfp_t gfp)
 	return &bdi->wb;
 }
 
-static inline bool inode_to_wb_is_valid(struct inode *inode)
-{
-	return true;
-}
-
 static inline struct bdi_writeback *inode_to_wb(struct inode *inode)
 {
 	return &inode_to_bdi(inode)->wb;
-- 
2.17.1