vmemmap: generify initialisation via helpers

Convert the common vmemmap population into initialisation helpers for use by
architecture vmemmap populators.  All architecture implementing the
SPARSEMEM_VMEMMAP variant supply an architecture specific vmemmap_populate()
initialiser, which may make use of the helpers.

This allows us to clean up and remove the initialisation Kconfig entries.
With this patch there is a single SPARSEMEM_VMEMMAP_ENABLE Kconfig option to
indicate use of that variant.

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Acked-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 2 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index d216abbd0574..fbff8e481cc4 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1219,10 +1219,15 @@ extern int randomize_va_space;
 const char * arch_vma_name(struct vm_area_struct *vma);
 
 struct page *sparse_early_mem_map_populate(unsigned long pnum, int nid);
-int vmemmap_populate(struct page *start_page, unsigned long pages, int node);
-int vmemmap_populate_pmd(pud_t *, unsigned long, unsigned long, int);
+pgd_t *vmemmap_pgd_populate(unsigned long addr, int node);
+pud_t *vmemmap_pud_populate(pgd_t *pgd, unsigned long addr, int node);
+pmd_t *vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int node);
+pte_t *vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node);
 void *vmemmap_alloc_block(unsigned long size, int node);
 void vmemmap_verify(pte_t *, int, unsigned long, unsigned long);
+int vmemmap_populate_basepages(struct page *start_page,
+                                                unsigned long pages, int node);
+int vmemmap_populate(struct page *start_page, unsigned long pages, int node);
 
 #endif /* __KERNEL__ */
 #endif /* _LINUX_MM_H */