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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2016-04-29 23:26:16 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2016-05-11 21:53:50 +1000
commitbcbe7f777eb396f9bbf4cb1cab3b206f50881191 (patch)
treef74718b93fe5d88b928f5365a58322c1dc6b43a4 /arch
parent27209206a60fa6ffc92e8d9886ae32abaad5b442 (diff)
powerpc/mm: Simplify the code dropping 4-level table #ifdef
Simplify the code by dropping 4-level page table #ifdef. We are always 4-level now. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/include/asm/book3s/64/pgalloc.h57
1 files changed, 18 insertions, 39 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/pgalloc.h b/arch/powerpc/include/asm/book3s/64/pgalloc.h
index 54017260c8bf..2a246245eca0 100644
--- a/arch/powerpc/include/asm/book3s/64/pgalloc.h
+++ b/arch/powerpc/include/asm/book3s/64/pgalloc.h
@@ -51,7 +51,6 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd);
}
-#ifndef CONFIG_PPC_64K_PAGES
static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
{
pgd_set(pgd, __pgtable_ptr_val(pud));
@@ -78,7 +77,13 @@ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
{
pmd_set(pmd, __pgtable_ptr_val(pte));
}
-
+/*
+ * FIXME!!
+ * Between 4K and 64K pages, we differ in what is stored in pmd. ie.
+ * typedef pte_t *pgtable_t; -> 64K
+ * typedef struct page *pgtable_t; -> 4k
+ */
+#ifdef CONFIG_PPC_4K_PAGES
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
pgtable_t pte_page)
{
@@ -176,36 +181,6 @@ extern void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift);
extern void __tlb_remove_table(void *_table);
#endif
-#ifndef __PAGETABLE_PUD_FOLDED
-/* book3s 64 is 4 level page table */
-static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
-{
- pgd_set(pgd, __pgtable_ptr_val(pud));
-}
-
-static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
-{
- return kmem_cache_alloc(PGT_CACHE(PUD_INDEX_SIZE),
- GFP_KERNEL|__GFP_REPEAT);
-}
-
-static inline void pud_free(struct mm_struct *mm, pud_t *pud)
-{
- kmem_cache_free(PGT_CACHE(PUD_INDEX_SIZE), pud);
-}
-#endif
-
-static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
-{
- pud_set(pud, __pgtable_ptr_val(pmd));
-}
-
-static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
- pte_t *pte)
-{
- pmd_set(pmd, __pgtable_ptr_val(pte));
-}
-
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
pgtable_t pte_page)
{
@@ -245,7 +220,7 @@ static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
tlb_flush_pgtable(tlb, address);
pgtable_free_tlb(tlb, table, 0);
}
-#endif /* CONFIG_PPC_64K_PAGES */
+#endif /* CONFIG_PPC_4K_PAGES */
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
@@ -258,13 +233,17 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
kmem_cache_free(PGT_CACHE(PMD_CACHE_INDEX), pmd);
}
-#define __pmd_free_tlb(tlb, pmd, addr) \
- pgtable_free_tlb(tlb, pmd, PMD_CACHE_INDEX)
-#ifndef __PAGETABLE_PUD_FOLDED
-#define __pud_free_tlb(tlb, pud, addr) \
- pgtable_free_tlb(tlb, pud, PUD_INDEX_SIZE)
+static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
+ unsigned long address)
+{
+ return pgtable_free_tlb(tlb, pmd, PMD_CACHE_INDEX);
+}
-#endif /* __PAGETABLE_PUD_FOLDED */
+static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
+ unsigned long address)
+{
+ pgtable_free_tlb(tlb, pud, PUD_INDEX_SIZE);
+}
#define check_pgt_cache() do { } while (0)