On 2021/10/5 01:45, David Sterba wrote:

On Mon, Sep 27, 2021 at 03:21:47PM +0800, Qu Wenruo wrote:

quoted

  fs/btrfs/compression.c | 89 +++++++++++++++++++++++++++---------------
  fs/btrfs/extent_io.c   |  1 +

   CC [M]  fs/btrfs/tests/extent-map-tests.o
fs/btrfs/compression.c: In function ‘add_ra_bio_pages’:
fs/btrfs/compression.c:680:25: error: implicit declaration of function ‘btrfs_subpage_start_reader’ [-Werror=implicit-function-declaration]
   680 |                         btrfs_subpage_start_reader(fs_info, page, cur, add_size);
       |

Fails when compiled with that patch on top.

Missing #include "subpage.h"

Oh, I added that in later patches, without doing a per-patch compiling
tests...

Sorry for that.

Thanks,
Qu