[PATCH mm-unstable v7 18/31] arm64: Convert various functions to use ptdescs

["Vishal Moola (Oracle)" <vishal.moola@xxxxxxxxx>]

As part of the conversions to replace pgtable constructor/destructors with
ptdesc equivalents, convert various page table functions to use ptdescs.

Signed-off-by: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
Acked-by: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
---
 arch/arm64/include/asm/tlb.h | 14 ++++++++------
 arch/arm64/mm/mmu.c          |  7 ++++---
 2 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/arch/arm64/include/asm/tlb.h b/arch/arm64/include/asm/tlb.h
index c995d1f4594f..2c29239d05c3 100644
--- a/arch/arm64/include/asm/tlb.h
+++ b/arch/arm64/include/asm/tlb.h
@@ -75,18 +75,20 @@ static inline void tlb_flush(struct mmu_gather *tlb)
 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
                                  unsigned long addr)
 {
-       pgtable_pte_page_dtor(pte);
-       tlb_remove_table(tlb, pte);
+       struct ptdesc *ptdesc = page_ptdesc(pte);
+
+       pagetable_pte_dtor(ptdesc);
+       tlb_remove_ptdesc(tlb, ptdesc);
 }
 
 #if CONFIG_PGTABLE_LEVELS > 2
 static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
                                  unsigned long addr)
 {
-       struct page *page = virt_to_page(pmdp);
+       struct ptdesc *ptdesc = virt_to_ptdesc(pmdp);
 
-       pgtable_pmd_page_dtor(page);
-       tlb_remove_table(tlb, page);
+       pagetable_pmd_dtor(ptdesc);
+       tlb_remove_ptdesc(tlb, ptdesc);
 }
 #endif
 
@@ -94,7 +96,7 @@ static inline void __pmd_free_tlb(struct mmu_gather *tlb, 
pmd_t *pmdp,
 static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp,
                                  unsigned long addr)
 {
-       tlb_remove_table(tlb, virt_to_page(pudp));
+       tlb_remove_ptdesc(tlb, virt_to_ptdesc(pudp));
 }
 #endif
 
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 95d360805f8a..47781bec6171 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -426,6 +426,7 @@ static phys_addr_t __pgd_pgtable_alloc(int shift)
 static phys_addr_t pgd_pgtable_alloc(int shift)
 {
        phys_addr_t pa = __pgd_pgtable_alloc(shift);
+       struct ptdesc *ptdesc = page_ptdesc(phys_to_page(pa));
 
        /*
         * Call proper page table ctor in case later we need to
@@ -433,12 +434,12 @@ static phys_addr_t pgd_pgtable_alloc(int shift)
         * this pre-allocated page table.
         *
         * We don't select ARCH_ENABLE_SPLIT_PMD_PTLOCK if pmd is
-        * folded, and if so pgtable_pmd_page_ctor() becomes nop.
+        * folded, and if so pagetable_pte_ctor() becomes nop.
         */
        if (shift == PAGE_SHIFT)
-               BUG_ON(!pgtable_pte_page_ctor(phys_to_page(pa)));
+               BUG_ON(!pagetable_pte_ctor(ptdesc));
        else if (shift == PMD_SHIFT)
-               BUG_ON(!pgtable_pmd_page_ctor(phys_to_page(pa)));
+               BUG_ON(!pagetable_pmd_ctor(ptdesc));
 
        return pa;
 }
-- 
2.40.1