Re: [PATCH 2/3] mm, migrate: remove reason argument from new_page_t

[Anshuman Khandual]

On 01/03/2018 01:55 PM, Michal Hocko wrote:
> From: Michal Hocko <mhocko@xxxxxxxx>
> 
> No allocation callback is using this argument anymore. new_page_node
> used to use this parameter to convey node_id resp. migration error
> up to move_pages code (do_move_page_to_node_array). The error status
> never made it into the final status field and we have a better way
> to communicate node id to the status field now. All other allocation
> callbacks simply ignored the argument so we can drop it finally.

There is a migrate_pages() call in powerpc which needs to be changed
as well. It was failing the build on powerpc.

diff --git a/arch/powerpc/mm/mmu_context_iommu.c b/arch/powerpc/mm/mmu_context_iommu.c
index e0a2d8e..91ee223 100644
--- a/arch/powerpc/mm/mmu_context_iommu.c
+++ b/arch/powerpc/mm/mmu_context_iommu.c
@@ -75,8 +75,7 @@ bool mm_iommu_preregistered(struct mm_struct *mm)
 /*
  * Taken from alloc_migrate_target with changes to remove CMA allocations
  */
-struct page *new_iommu_non_cma_page(struct page *page, unsigned long private,
-                                       int **resultp)
+struct page *new_iommu_non_cma_page(struct page *page, unsigned long private)
 {
        gfp_t gfp_mask = GFP_USER;
        struct page *new_page;