opeinrisc: switch to generic version of pte allocation

Replace pte_alloc_one(), pte_free() and pte_free_kernel() with the generic
implementation. The only actual functional change is the addition of
__GFP_ACCOUT for the allocation of the user page tables.

The pte_alloc_one_kernel() is kept back because its implementation on
openrisc is different than the generic one.

Signed-off-by: Mike Rapoport <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Reviewed-by: Pekka Enberg <[e-mail]>
Acked-by: Stafford Horne <[e-mail]>
Cc: Abdul Haleem <[e-mail]>
Cc: Andy Lutomirski <[e-mail]>
Cc: Arnd Bergmann <[e-mail]>
Cc: Christophe Leroy <[e-mail]>
Cc: Joerg Roedel <[e-mail]>
Cc: Joerg Roedel <[e-mail]>
Cc: Max Filippov <[e-mail]>
Cc: Peter Zijlstra (Intel) <[e-mail]>
Cc: Satheesh Rajendran <[e-mail]>
Cc: Stephen Rothwell <[e-mail]>
Cc: Steven Rostedt <[e-mail]>
Cc: Geert Uytterhoeven <[e-mail]>
Cc: Matthew Wilcox <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Linus Torvalds <[e-mail]>

arch/openrisc/include/asm/pgalloc.h

···
 #include <linux/mm.h>
 #include <linux/memblock.h>
 
+#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
+#include <asm-generic/pgalloc.h>
+
 extern int mem_init_done;
 
 #define pmd_populate_kernel(mm, pmd, pte) \
···
 }
 #endif
 
-static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
-{
-	free_page((unsigned long)pgd);
-}
-
 extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm);
-
-static inline struct page *pte_alloc_one(struct mm_struct *mm)
-{
-	struct page *pte;
-	pte = alloc_pages(GFP_KERNEL, 0);
-	if (!pte)
-		return NULL;
-	clear_page(page_address(pte));
-	if (!pgtable_pte_page_ctor(pte)) {
-		__free_page(pte);
-		return NULL;
-	}
-	return pte;
-}
-
-static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
-{
-	free_page((unsigned long)pte);
-}
-
-static inline void pte_free(struct mm_struct *mm, struct page *pte)
-{
-	pgtable_pte_page_dtor(pte);
-	__free_page(pte);
-}
 
 #define __pte_free_tlb(tlb, pte, addr)	\
 do {					\