[PATCH 28/33] riscv: Convert alloc_{pmd, pte}_late() 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.

Some of the functions use the *get*page*() helper functions. Convert
these to use ptdesc_alloc() and ptdesc_address() instead to help
standardize page tables further.

Signed-off-by: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
---
 arch/riscv/include/asm/pgalloc.h |  8 ++++----
 arch/riscv/mm/init.c             | 16 ++++++----------
 2 files changed, 10 insertions(+), 14 deletions(-)

diff --git a/arch/riscv/include/asm/pgalloc.h b/arch/riscv/include/asm/pgalloc.h
index 59dc12b5b7e8..cb5536403bd8 100644
--- a/arch/riscv/include/asm/pgalloc.h
+++ b/arch/riscv/include/asm/pgalloc.h
@@ -153,10 +153,10 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
 
 #endif /* __PAGETABLE_PMD_FOLDED */
 
-#define __pte_free_tlb(tlb, pte, buf)   \
-do {                                    \
-       pgtable_pte_page_dtor(pte);     \
-       tlb_remove_page((tlb), pte);    \
+#define __pte_free_tlb(tlb, pte, buf)                  \
+do {                                                   \
+       ptdesc_pte_dtor(page_ptdesc(pte));              \
+       tlb_remove_page_ptdesc((tlb), page_ptdesc(pte));\
 } while (0)
 #endif /* CONFIG_MMU */
 
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 0f14f4a8d179..2737cbc4ad12 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -346,12 +346,10 @@ static inline phys_addr_t __init 
alloc_pte_fixmap(uintptr_t va)
 
 static phys_addr_t __init alloc_pte_late(uintptr_t va)
 {
-       unsigned long vaddr;
-
-       vaddr = __get_free_page(GFP_KERNEL);
-       BUG_ON(!vaddr || !pgtable_pte_page_ctor(virt_to_page(vaddr)));
+       struct ptdesc *ptdesc = ptdesc_alloc(GFP_KERNEL, 0);
 
-       return __pa(vaddr);
+       BUG_ON(!ptdesc || !ptdesc_pte_ctor(ptdesc));
+       return __pa((pte_t *)ptdesc_address(ptdesc));
 }
 
 static void __init create_pte_mapping(pte_t *ptep,
@@ -429,12 +427,10 @@ static phys_addr_t __init alloc_pmd_fixmap(uintptr_t va)
 
 static phys_addr_t __init alloc_pmd_late(uintptr_t va)
 {
-       unsigned long vaddr;
-
-       vaddr = __get_free_page(GFP_KERNEL);
-       BUG_ON(!vaddr || !pgtable_pmd_page_ctor(virt_to_page(vaddr)));
+       struct ptdesc *ptdesc = ptdesc_alloc(GFP_KERNEL, 0);
 
-       return __pa(vaddr);
+       BUG_ON(!ptdesc || !ptdesc_pmd_ctor(ptdesc));
+       return __pa((pmd_t *)ptdesc_address(ptdesc));
 }
 
 static void __init create_pmd_mapping(pmd_t *pmdp,
-- 
2.39.2