Merge patch series "iomap: cleanups ahead of adding fuse support"

Darrick J. Wong <djwong@kernel.org> says:

In preparation for making fuse use the fs/iomap code for regular file
data IO, fix a few bugs in fuse and apply a couple of tweaks to iomap.
These patches can go in immediately.

* patches from https://lore.kernel.org/175803480273.966383.16598493355913871794.stgit@frogsfrogsfrogs:
  iomap: error out on file IO when there is no inline_data buffer
  iomap: trace iomap_zero_iter zeroing activities

Signed-off-by: Christian Brauner <brauner@kernel.org>