From f182536684d876afaf4627c36a16c4e15ea8a2b8 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@redhat.com>
Date: Wed, 18 Jul 2018 15:44:40 +0200
Subject: vfs: export vfs_dedupe_file_range_one() to modules

This is needed by the stacked dedupe implementation in overlayfs.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---
 include/linux/fs.h | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'include/linux')

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 019817a083a0..b67209948f1b 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1829,6 +1829,10 @@ extern int vfs_dedupe_file_range_compare(struct inode *src, loff_t srcoff,
 					 loff_t len, bool *is_same);
 extern int vfs_dedupe_file_range(struct file *file,
 				 struct file_dedupe_range *same);
+extern int vfs_dedupe_file_range_one(struct file *src_file, loff_t src_pos,
+				     struct file *dst_file, loff_t dst_pos,
+				     u64 len);
+
 
 struct super_operations {
    	struct inode *(*alloc_inode)(struct super_block *sb);
-- 
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