if (buffer_mapped(bh) && bh->b_blocknr == 0) {
struct btrfs_key key;
struct btrfs_path *path;
- char *ptr;
+ char *ptr, *kaddr;
u32 datasize;
/* create an inline extent, and copy the data in */
btrfs_set_file_extent_type(ei,
BTRFS_FILE_EXTENT_INLINE);
ptr = btrfs_file_extent_inline_start(ei);
+ kaddr = kmap_atomic(bh->b_page, KM_USER0);
btrfs_memcpy(root, path->nodes[0]->b_data,
- ptr, bh->b_data, offset + write_bytes);
+ ptr, kaddr + bh_offset(bh),
+ offset + write_bytes);
+ kunmap_atomic(kaddr, KM_USER0);
mark_buffer_dirty(path->nodes[0]);
btrfs_free_path(path);
} else if (buffer_mapped(bh)) {