powerpc/mm: refactor pmd_pgtable()

pmd_pgtable() is identical on the 4 subarches, refactor it.
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/book3s/32/pgalloc.h

@@ -37,8 +37,6 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp,
 	*pmdp = __pmd(__pa(pte_page) | _PMD_PRESENT);
 }
 
-#define pmd_pgtable(pmd) ((pgtable_t)pmd_page_vaddr(pmd))
-
 static inline void pgtable_free(void *table, unsigned index_size)
 {
 	if (!index_size) {

arch/powerpc/include/asm/book3s/64/pgalloc.h

@@ -163,11 +163,6 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
 	*pmd = __pmd(__pgtable_ptr_val(pte_page) | PMD_VAL_BITS);
 }
 
-static inline pgtable_t pmd_pgtable(pmd_t pmd)
-{
-	return (pgtable_t)pmd_page_vaddr(pmd);
-}
-
 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
 				  unsigned long address)
 {

arch/powerpc/include/asm/nohash/32/pgalloc.h

@@ -43,6 +43,4 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp,
 		*pmdp = __pmd(__pa(pte_page) | _PMD_USER | _PMD_PRESENT);
 }
 
-#define pmd_pgtable(pmd) ((pgtable_t)pmd_page_vaddr(pmd))
-
 #endif /* _ASM_POWERPC_PGALLOC_32_H */

arch/powerpc/include/asm/nohash/64/pgalloc.h

@@ -59,8 +59,6 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
 	pmd_set(pmd, (unsigned long)pte_page);
 }
 
-#define pmd_pgtable(pmd) ((pgtable_t)pmd_page_vaddr(pmd))
-
 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
 {
 	return kmem_cache_alloc(PGT_CACHE(PMD_CACHE_INDEX),

arch/powerpc/include/asm/pgalloc.h

@@ -72,4 +72,9 @@ static inline void check_pgt_cache(void) { }
 #include <asm/nohash/pgalloc.h>
 #endif
 
+static inline pgtable_t pmd_pgtable(pmd_t pmd)
+{
+	return (pgtable_t)pmd_page_vaddr(pmd);
+}
+
 #endif /* _ASM_POWERPC_PGALLOC_H */