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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>
This commit is contained in:
Mike Rapoport 2019-09-23 15:35:28 -07:00 committed by Linus Torvalds
parent 6fb12766f7
commit 1b9a9d8564
1 changed files with 3 additions and 36 deletions
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39
arch/microblaze/include/asm/pgalloc.h
View File

@ -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) \