[dm-devel] [dm:for-next 30/30] drivers/md/dm-thin.c:338:5: sparse: symbol '__blkdev_issue_discard_async' was not declared. Should it be static?

[kbuild test robot]

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git for-next
head:   9f1e427e6d6c80f0c3d7b38ddfbd98c9f8f2af41
commit: 9f1e427e6d6c80f0c3d7b38ddfbd98c9f8f2af41 [30/30] dm thin: range discard support
reproduce:
  # apt-get install sparse
  git checkout 9f1e427e6d6c80f0c3d7b38ddfbd98c9f8f2af41
  make ARCH=x86_64 allmodconfig
  make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> drivers/md/dm-thin.c:338:5: sparse: symbol '__blkdev_issue_discard_async' was not declared. Should it be static?

Please review and possibly fold the followup patch.

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