microblaze: switch to generic version of pte allocation

The microblaze implementation of pte_alloc_one() has a provision to
allocated PTEs from high memory, but neither CONFIG_HIGHPTE nor pte_map*()
versions for suitable for HIGHPTE are defined.

Except that, microblaze version of pte_alloc_one() is identical to the
generic one as well as the implementations of pte_free() and
pte_free_kernel().

Switch microblaze to use the generic versions of these functions.  Also
remove pte_free_slow() that is not referenced anywhere in the code.

Link: http://lkml.kernel.org/r/1565690952-32158-1-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/microblaze/include/asm/pgalloc.h b/arch/microblaze/include/asm/pgalloc.h
index ac0731881751422bf828fe79a4addd35f4dfe85a..7ecb05baa601f875dba9cad9e5f56da0f1007ae8 100644 (file)
--- a/arch/microblaze/include/asm/pgalloc.h
+++ b/arch/microblaze/include/asm/pgalloc.h
@@ -21,6 +21,9 @@
 #include <asm/cache.h>
 #include <asm/pgtable.h>
 
+#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
+#include <asm-generic/pgalloc.h>
+
 extern void __bad_pte(pmd_t *pmd);
 
 static inline pgd_t *get_pgd(void)
@@ -47,42 +50,6 @@ static inline void free_pgd(pgd_t *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 *ptepage;
-
-#ifdef CONFIG_HIGHPTE
-       int flags = GFP_KERNEL | __GFP_ZERO | __GFP_HIGHMEM;
-#else
-       int flags = GFP_KERNEL | __GFP_ZERO;
-#endif
-
-       ptepage = alloc_pages(flags, 0);
-       if (!ptepage)
-               return NULL;
-       if (!pgtable_page_ctor(ptepage)) {
-               __free_page(ptepage);
-               return NULL;
-       }
-       return ptepage;
-}
-
-static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
-{
-       free_page((unsigned long)pte);
-}
-
-static inline void pte_free_slow(struct page *ptepage)
-{
-       __free_page(ptepage);
-}
-
-static inline void pte_free(struct mm_struct *mm, struct page *ptepage)
-{
-       pgtable_page_dtor(ptepage);
-       __free_page(ptepage);
-}
-
 #define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, (pte))
 
 #define pmd_populate(mm, pmd, pte) \