[PATCH 8/8] btrfs: use bvec_kmap_local in btrfs_decompress_buf2page

[Christoph Hellwig <hch@lst.de>]

This removes the last direct poke into bvec internals in btrfs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/btrfs/compression.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index e7f8ee5d48a4..9d0996c8370d 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -1182,6 +1182,7 @@ int btrfs_decompress_buf2page(const char *buf, u32 buf_len,
 		u32 copy_start;
 		/* Offset inside the full decompressed extent */
 		u32 bvec_offset;
+		void *kaddr;
 
 		bvec = bio_iter_iovec(orig_bio, orig_bio->bi_iter);
 		/*
@@ -1204,10 +1205,12 @@ int btrfs_decompress_buf2page(const char *buf, u32 buf_len,
 		 * @buf + @buf_len.
 		 */
 		ASSERT(copy_start - decompressed < buf_len);
-		memcpy_to_page(bvec.bv_page, bvec.bv_offset,
-			       buf + copy_start - decompressed, copy_len);
-		cur_offset += copy_len;
 
+		kaddr = bvec_kmap_local(&bvec);
+		memcpy(kaddr, buf + copy_start - decompressed, copy_len);
+		kunmap_local(kaddr);
+
+		cur_offset += copy_len;
 		bio_advance(orig_bio, copy_len);
 		/* Finished the bio */
 		if (!orig_bio->bi_iter.bi_size)
-- 
2.47.2