mm: split out a new pagewalk.h header from mm.h

Add a new header for the two handful of users of the walk_page_range /
walk_page_vma interface instead of polluting all users of mm.h with it.

Link: https://lore.kernel.org/r/20190828141955.22210-2-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/mm/hmm.c b/mm/hmm.c
index 4882b83aeccb..26916ff6c8df 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -8,7 +8,7 @@
  * Refer to include/linux/hmm.h for information about heterogeneous memory
  * management or HMM for short.
  */
-#include <linux/mm.h>
+#include <linux/pagewalk.h>
 #include <linux/hmm.h>
 #include <linux/init.h>
 #include <linux/rmap.h>