Hi all,

After merging the block tree, today's linux-next build (powerpc
ppc64_defconfig) produced this warning:

drivers/md/dm.c: In function '__map_bio':
drivers/md/dm.c:1296:24: warning: unused variable 'md' [-Wunused-variable]
 1296 |  struct mapped_device *md = io->md;
      |                        ^~

Introduced by commit

  5a6c35f9af41 ("block: remove direct_make_request")

-- 
Cheers,
Stephen Rothwell