btrfs: move extent_range_clear_dirty_for_io() into inode.c

The function is only used inside inode.c by compress_file_range(),
so move it to inode.c and unexport it.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 12fb7e8056a1..0ebe96ca4eb2 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -867,6 +867,21 @@ static inline void inode_should_defrag(struct btrfs_inode *inode,
 		btrfs_add_inode_defrag(NULL, inode, small_write);
 }
 
+static void extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end)
+{
+	unsigned long index = start >> PAGE_SHIFT;
+	unsigned long end_index = end >> PAGE_SHIFT;
+	struct page *page;
+
+	while (index <= end_index) {
+		page = find_get_page(inode->i_mapping, index);
+		BUG_ON(!page); /* Pages should be in the extent_io_tree */
+		clear_page_dirty_for_io(page);
+		put_page(page);
+		index++;
+	}
+}
+
 /*
  * Work queue call back to started compression on a file and pages.
  *