[PATCH] f2fs: fix to wait GCed compressed page writeback

[Chao Yu]

like we did for encrypted page.

Signed-off-by: Chao Yu <yuchao0@xxxxxxxxxx>
---
 fs/f2fs/compress.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index b3ecf7d4d6d8..3a847bc36748 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -1152,6 +1152,13 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
 		f2fs_set_compressed_page(cc->cpages[i], inode,
 					cc->rpages[i + 1]->index, cic);
 		fio.compressed_page = cc->cpages[i];
+
+		fio.old_blkaddr = data_blkaddr(dn.inode, dn.node_page,
+						dn.ofs_in_node + i + 1);
+
+		/* wait for GCed page writeback via META_MAPPING */
+		f2fs_wait_on_block_writeback(inode, fio.old_blkaddr);
+
 		if (fio.encrypted) {
 			fio.page = cc->rpages[i + 1];
 			err = f2fs_encrypt_one_page(&fio);
-- 
2.26.2