[PATCH v2 06/12] sparc64: mm: Call ctor/dtor for kernel PTEs

[Kevin Brodsky]

The generic implementation of pte_{alloc_one,free}_kernel now calls
the [cd]tor, without initialising the ptlock needlessly as
pagetable_pte_ctor() skips it for init_mm.

Align sparc64 with the generic implementation by ensuring
pagetable_pte_[cd]tor() are called for kernel PTEs. As a result
the kernel and user alloc/free functions have the same
implementation, and since pgtable_t is defined as pte_t *, we can
have both call a common helper.

Signed-off-by: Kevin Brodsky <kevin.brod...@arm.com>
---
 arch/sparc/mm/init_64.c | 27 +++++++++++++--------------
 1 file changed, 13 insertions(+), 14 deletions(-)

diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 5c8eabda1d17..25ae4c897aae 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -2878,18 +2878,7 @@ void __flush_tlb_all(void)
                             : : "r" (pstate));
 }
 
-pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
-{
-       struct page *page = alloc_page(GFP_KERNEL | __GFP_ZERO);
-       pte_t *pte = NULL;
-
-       if (page)
-               pte = (pte_t *) page_address(page);
-
-       return pte;
-}
-
-pgtable_t pte_alloc_one(struct mm_struct *mm)
+static pte_t *__pte_alloc_one(struct mm_struct *mm)
 {
        struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL | __GFP_ZERO, 0);
 
@@ -2902,9 +2891,14 @@ pgtable_t pte_alloc_one(struct mm_struct *mm)
        return ptdesc_address(ptdesc);
 }
 
-void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
 {
-       free_page((unsigned long)pte);
+       return __pte_alloc_one(mm);
+}
+
+pgtable_t pte_alloc_one(struct mm_struct *mm)
+{
+       return __pte_alloc_one(mm);
 }
 
 static void __pte_free(pgtable_t pte)
@@ -2915,6 +2909,11 @@ static void __pte_free(pgtable_t pte)
        pagetable_free(ptdesc);
 }
 
+void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+       __pte_free(pte);
+}
+
 void pte_free(struct mm_struct *mm, pgtable_t pte)
 {
        __pte_free(pte);
-- 
2.47.0