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Subject[PATCH] microblaze: switch to generic version of pte allocation
Date
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.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
---
The patch is vs. mmots/master since this tree contains bothi "mm: remove
quicklist page table caches" and "mm: treewide: clarify
pgtable_page_{ctor,dtor}() naming" patches that had a conflict resulting in
a build failure [1].

[1] https://lore.kernel.org/linux-mm/201908131204.B910fkl1%25lkp@intel.com/

arch/microblaze/include/asm/pgalloc.h | 39 +++--------------------------------
1 file changed, 3 insertions(+), 36 deletions(-)

diff --git a/arch/microblaze/include/asm/pgalloc.h b/arch/microblaze/include/asm/pgalloc.h
index dbf25a3..7ecb05b 100644
--- 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_pte_page_dtor(ptepage);
- __free_page(ptepage);
-}
-
#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, (pte))

#define pmd_populate(mm, pmd, pte) \
--
2.7.4
\
 
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