[ARM] Make ARM work with rmap

ARM can use the generic rmap.h.  It doesn't need its own version.

include/asm-arm/proc-armv/rmap.h

-#ifndef _ARMV_RMAP_H
-#define _ARMV_RMAP_H
-/*
- * linux/include/asm-arm/proc-armv/rmap.h
- *
- * Architecture dependant parts of the reverse mapping code,
- *
- * ARM is different since hardware page tables are smaller than
- * the page size and Linux uses a "duplicate" one with extra info.
- * For rmap this means that the first 2 kB of a page are the hardware
- * page tables and the last 2 kB are the software page tables.
- */
-
-static inline void pgtable_add_rmap(pte_t * ptep, struct mm_struct * mm, unsigned long address)
-{
-	struct page * page = virt_to_page(ptep);
-
-	page->mm = mm;
-	page->index = address & ~((PTRS_PER_PTE * PAGE_SIZE) - 1);
-	inc_page_state(nr_page_table_pages);
-}
-
-static inline void pgtable_remove_rmap(pte_t * ptep)
-{
-	struct page * page = virt_to_page(ptep);
-
-	page->mm = NULL;
-	page->index = 0;
-	dec_page_state(nr_page_table_pages);
-}
-
-static inline struct mm_struct * ptep_to_mm(pte_t * ptep)
-{
-	struct page * page = virt_to_page(ptep);
-
-	return page->mm;
-}
-
-/* The page table takes half of the page */
-#define PTE_MASK  ((PAGE_SIZE / 2) - 1)
-
-static inline unsigned long ptep_to_address(pte_t * ptep)
-{
-	struct page * page = virt_to_page(ptep);
-	unsigned long low_bits;
-
-	low_bits = ((unsigned long)ptep & PTE_MASK) * PTRS_PER_PTE;
-	return page->index + low_bits;
-}
-
-#endif /* _ARMV_RMAP_H */

include/asm-arm/rmap.h

 #ifndef _ARM_RMAP_H
 #define _ARM_RMAP_H
 
-#include <asm/proc/rmap.h>
+#include <asm-generic/rmap.h>
 
 #endif /* _ARM_RMAP_H */