Hi all,

Today's linux-next merge of the akpm-current tree got a conflict in:

  include/linux/mm.h

between commit:

  25b2995a35b6 ("mm: remove MEMORY_DEVICE_PUBLIC support")

from the hmm tree and commit:

  0a470a2d114a ("mm: clean up is_device_*_page() definitions")

from the akpm-current tree.

I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc include/linux/mm.h
index d405a7cff62a,12980954daf9..000000000000
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@@ -950,27 -953,15 +950,7 @@@ static inline bool put_devmap_managed_p
  	}
  	return false;
  }
- 
- static inline bool is_device_private_page(const struct page *page)
- {
- 	return is_zone_device_page(page) &&
- 		page->pgmap->type == MEMORY_DEVICE_PRIVATE;
- }
- 
- #ifdef CONFIG_PCI_P2PDMA
- static inline bool is_pci_p2pdma_page(const struct page *page)
- {
- 	return is_zone_device_page(page) &&
- 		page->pgmap->type == MEMORY_DEVICE_PCI_P2PDMA;
- }
- #else /* CONFIG_PCI_P2PDMA */
- static inline bool is_pci_p2pdma_page(const struct page *page)
- {
- 	return false;
- }
- #endif /* CONFIG_PCI_P2PDMA */
- 
  #else /* CONFIG_DEV_PAGEMAP_OPS */
 -static inline void dev_pagemap_get_ops(void)
 -{
 -}
 -
 -static inline void dev_pagemap_put_ops(void)
 -{
 -}
 -
  static inline bool put_devmap_managed_page(struct page *page)
  {
  	return false;
@@@ -978,14 -970,27 +959,19 @@@
  
  static inline bool is_device_private_page(const struct page *page)
  {
- 	return false;
+ 	return IS_ENABLED(CONFIG_DEV_PAGEMAP_OPS) &&
+ 		IS_ENABLED(CONFIG_DEVICE_PRIVATE) &&
+ 		is_zone_device_page(page) &&
+ 		page->pgmap->type == MEMORY_DEVICE_PRIVATE;
  }
  
 -static inline bool is_device_public_page(const struct page *page)
 -{
 -	return IS_ENABLED(CONFIG_DEV_PAGEMAP_OPS) &&
 -		IS_ENABLED(CONFIG_DEVICE_PUBLIC) &&
 -		is_zone_device_page(page) &&
 -		page->pgmap->type == MEMORY_DEVICE_PUBLIC;
 -}
 -
  static inline bool is_pci_p2pdma_page(const struct page *page)
  {
- 	return false;
+ 	return IS_ENABLED(CONFIG_DEV_PAGEMAP_OPS) &&
+ 		IS_ENABLED(CONFIG_PCI_P2PDMA) &&
+ 		is_zone_device_page(page) &&
+ 		page->pgmap->type == MEMORY_DEVICE_PCI_P2PDMA;
  }
- #endif /* CONFIG_DEV_PAGEMAP_OPS */
  
  /* 127: arbitrary random number, small enough to assemble well */
  #define page_ref_zero_or_close_to_overflow(page) \