1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 8f6654c21711..2a815560fda0 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -748,6 +748,11 @@ static inline void inode_lock_nested(struct inode *inode, unsigned subclass)
 	down_write_nested(&inode->i_rwsem, subclass);
 }
 
+static inline void inode_lock_shared_nested(struct inode *inode, unsigned subclass)
+{
+	down_read_nested(&inode->i_rwsem, subclass);
+}
+
 void lock_two_nondirectories(struct inode *, struct inode*);
 void unlock_two_nondirectories(struct inode *, struct inode*);
 
@@ -2980,6 +2985,7 @@ enum {
 };
 
 void dio_end_io(struct bio *bio);
+void dio_warn_stale_pagecache(struct file *filp);
 
 ssize_t __blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
 			     struct block_device *bdev, struct iov_iter *iter,