On Thu, Jul 21, 2016 at 11:13 PM, Stephen Rothwell [off-list ref] wrote:

Hi Dan,

After merging the nvdimm tree, today's linux-next build (powerpc
ppc64_defconfig) failed like this:

In file included from drivers/md/dm.h:14:0,
                 from drivers/md/dm-uevent.c:27:
include/linux/device-mapper.h:134:22: error: expected ';', ',' or ')' before '*' token
          void __pmem **kaddr, pfn_t *pfn, long size);
                      ^
include/linux/device-mapper.h:182:2: error: unknown type name 'dm_direct_access_fn'
  dm_direct_access_fn direct_access;
  ^

Caused by commit

  7a9eb2066631 ("pmem: kill __pmem address space")

interacting with commit

  545ed20e6df6 ("dm: add infrastructure for DAX support")

from the device-mapper tree.

I applied the following merge fix patch for today.  Someone needs to
tell Linus about this when he merges the trees.

There's no real rush to remove "__pmem" I'll pull this out until after
DM DAX support has merged.

Thanks Stephen!