This is needed by the stacked dedupe implementation in overlayfs.
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
---
fs/read_write.c | 6 +++---
include/linux/fs.h | 4 ++++
2 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/fs/read_write.c b/fs/read_write.c
index 023df230e2a0..08708f903fc5 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1964,9 +1964,8 @@ int vfs_dedupe_file_range_compare(struct inode *src, loff_t srcoff,
}
EXPORT_SYMBOL(vfs_dedupe_file_range_compare);
-static s64 vfs_dedupe_file_range_one(struct file *src_file, loff_t src_pos,
- struct file *dst_file, loff_t dst_pos,
- u64 len)
+s64 vfs_dedupe_file_range_one(struct file *src_file, loff_t src_pos,
+ struct file *dst_file, loff_t dst_pos, u64 len)
{
s64 ret;
@@ -2001,6 +2000,7 @@ static s64 vfs_dedupe_file_range_one(struct file *src_file, loff_t src_pos,
return ret;
}
+EXPORT_SYMBOL(vfs_dedupe_file_range_one);
int vfs_dedupe_file_range(struct file *file, struct file_dedupe_range *same)
{
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 26685011c4bd..c85a8059f038 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1817,6 +1817,10 @@ 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 s64 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);
--
2.14.3
--
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