[PATCH mm-unstable v8 17/31] arm: Convert various functions to use ptdescs

[Vishal Moola (Oracle)]

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

late_alloc() also uses the __get_free_pages() helper function. Convert
this to use pagetable_alloc() and ptdesc_address() instead to help
standardize page tables further.

Signed-off-by: Vishal Moola (Oracle) <vishal.moola at gmail.com>
Acked-by: Mike Rapoport (IBM) <rppt at kernel.org>
---
 arch/arm/include/asm/tlb.h | 12 +++++++-----
 arch/arm/mm/mmu.c          |  7 ++++---
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/arch/arm/include/asm/tlb.h b/arch/arm/include/asm/tlb.h
index b8cbe03ad260..f40d06ad5d2a 100644
--- a/arch/arm/include/asm/tlb.h
+++ b/arch/arm/include/asm/tlb.h
@@ -39,7 +39,9 @@ static inline void __tlb_remove_table(void *_table)
 static inline void
 __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, unsigned long addr)
 {
-	pgtable_pte_page_dtor(pte);
+	struct ptdesc *ptdesc = page_ptdesc(pte);
+
+	pagetable_pte_dtor(ptdesc);
 
 #ifndef CONFIG_ARM_LPAE
 	/*
@@ -50,17 +52,17 @@ __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, unsigned long addr)
 	__tlb_adjust_range(tlb, addr - PAGE_SIZE, 2 * PAGE_SIZE);
 #endif
 
-	tlb_remove_table(tlb, pte);
+	tlb_remove_ptdesc(tlb, ptdesc);
 }
 
 static inline void
 __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, unsigned long addr)
 {
 #ifdef CONFIG_ARM_LPAE
-	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
 }
 
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 13fc4bb5f792..fdeaee30d167 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -737,11 +737,12 @@ static void __init *early_alloc(unsigned long sz)
 
 static void *__init late_alloc(unsigned long sz)
 {
-	void *ptr = (void *)__get_free_pages(GFP_PGTABLE_KERNEL, get_order(sz));
+	void *ptdesc = pagetable_alloc(GFP_PGTABLE_KERNEL & ~__GFP_HIGHMEM,
+			get_order(sz));
 
-	if (!ptr || !pgtable_pte_page_ctor(virt_to_page(ptr)))
+	if (!ptdesc || !pagetable_pte_ctor(ptdesc))
 		BUG();
-	return ptr;
+	return ptdesc_to_virt(ptdesc);
 }
 
 static pte_t * __init arm_pte_alloc(pmd_t *pmd, unsigned long addr,
-- 
2.40.1