[PATCH mm-unstable v9 12/31] powerpc: Convert various functions to use ptdescs

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

In order to split struct ptdesc from struct page, convert various
functions to use ptdescs.

Acked-by: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
---
 arch/powerpc/mm/book3s64/mmu_context.c | 10 ++---
 arch/powerpc/mm/book3s64/pgtable.c     | 32 +++++++-------
 arch/powerpc/mm/pgtable-frag.c         | 58 +++++++++++++-------------
 3 files changed, 50 insertions(+), 50 deletions(-)

diff --git a/arch/powerpc/mm/book3s64/mmu_context.c 
b/arch/powerpc/mm/book3s64/mmu_context.c
index c766e4c26e42..1715b07c630c 100644
--- a/arch/powerpc/mm/book3s64/mmu_context.c
+++ b/arch/powerpc/mm/book3s64/mmu_context.c
@@ -246,15 +246,15 @@ static void destroy_contexts(mm_context_t *ctx)
 static void pmd_frag_destroy(void *pmd_frag)
 {
        int count;
-       struct page *page;
+       struct ptdesc *ptdesc;
 
-       page = virt_to_page(pmd_frag);
+       ptdesc = virt_to_ptdesc(pmd_frag);
        /* drop all the pending references */
        count = ((unsigned long)pmd_frag & ~PAGE_MASK) >> PMD_FRAG_SIZE_SHIFT;
        /* We allow PTE_FRAG_NR fragments from a PTE page */
-       if (atomic_sub_and_test(PMD_FRAG_NR - count, &page->pt_frag_refcount)) {
-               pgtable_pmd_page_dtor(page);
-               __free_page(page);
+       if (atomic_sub_and_test(PMD_FRAG_NR - count, 
&ptdesc->pt_frag_refcount)) {
+               pagetable_pmd_dtor(ptdesc);
+               pagetable_free(ptdesc);
        }
 }
 
diff --git a/arch/powerpc/mm/book3s64/pgtable.c 
b/arch/powerpc/mm/book3s64/pgtable.c
index 75b938268b04..1498ccd08367 100644
--- a/arch/powerpc/mm/book3s64/pgtable.c
+++ b/arch/powerpc/mm/book3s64/pgtable.c
@@ -384,22 +384,22 @@ static pmd_t *get_pmd_from_cache(struct mm_struct *mm)
 static pmd_t *__alloc_for_pmdcache(struct mm_struct *mm)
 {
        void *ret = NULL;
-       struct page *page;
+       struct ptdesc *ptdesc;
        gfp_t gfp = GFP_KERNEL_ACCOUNT | __GFP_ZERO;
 
        if (mm == &init_mm)
                gfp &= ~__GFP_ACCOUNT;
-       page = alloc_page(gfp);
-       if (!page)
+       ptdesc = pagetable_alloc(gfp, 0);
+       if (!ptdesc)
                return NULL;
-       if (!pgtable_pmd_page_ctor(page)) {
-               __free_pages(page, 0);
+       if (!pagetable_pmd_ctor(ptdesc)) {
+               pagetable_free(ptdesc);
                return NULL;
        }
 
-       atomic_set(&page->pt_frag_refcount, 1);
+       atomic_set(&ptdesc->pt_frag_refcount, 1);
 
-       ret = page_address(page);
+       ret = ptdesc_address(ptdesc);
        /*
         * if we support only one fragment just return the
         * allocated page.
@@ -409,12 +409,12 @@ static pmd_t *__alloc_for_pmdcache(struct mm_struct *mm)
 
        spin_lock(&mm->page_table_lock);
        /*
-        * If we find pgtable_page set, we return
+        * If we find ptdesc_page set, we return
         * the allocated page with single fragment
         * count.
         */
        if (likely(!mm->context.pmd_frag)) {
-               atomic_set(&page->pt_frag_refcount, PMD_FRAG_NR);
+               atomic_set(&ptdesc->pt_frag_refcount, PMD_FRAG_NR);
                mm->context.pmd_frag = ret + PMD_FRAG_SIZE;
        }
        spin_unlock(&mm->page_table_lock);
@@ -435,15 +435,15 @@ pmd_t *pmd_fragment_alloc(struct mm_struct *mm, unsigned 
long vmaddr)
 
 void pmd_fragment_free(unsigned long *pmd)
 {
-       struct page *page = virt_to_page(pmd);
+       struct ptdesc *ptdesc = virt_to_ptdesc(pmd);
 
-       if (PageReserved(page))
-               return free_reserved_page(page);
+       if (pagetable_is_reserved(ptdesc))
+               return free_reserved_ptdesc(ptdesc);
 
-       BUG_ON(atomic_read(&page->pt_frag_refcount) <= 0);
-       if (atomic_dec_and_test(&page->pt_frag_refcount)) {
-               pgtable_pmd_page_dtor(page);
-               __free_page(page);
+       BUG_ON(atomic_read(&ptdesc->pt_frag_refcount) <= 0);
+       if (atomic_dec_and_test(&ptdesc->pt_frag_refcount)) {
+               pagetable_pmd_dtor(ptdesc);
+               pagetable_free(ptdesc);
        }
 }
 
diff --git a/arch/powerpc/mm/pgtable-frag.c b/arch/powerpc/mm/pgtable-frag.c
index 0c6b68130025..8c31802f97e8 100644
--- a/arch/powerpc/mm/pgtable-frag.c
+++ b/arch/powerpc/mm/pgtable-frag.c
@@ -18,15 +18,15 @@
 void pte_frag_destroy(void *pte_frag)
 {
        int count;
-       struct page *page;
+       struct ptdesc *ptdesc;
 
-       page = virt_to_page(pte_frag);
+       ptdesc = virt_to_ptdesc(pte_frag);
        /* drop all the pending references */
        count = ((unsigned long)pte_frag & ~PAGE_MASK) >> PTE_FRAG_SIZE_SHIFT;
        /* We allow PTE_FRAG_NR fragments from a PTE page */
-       if (atomic_sub_and_test(PTE_FRAG_NR - count, &page->pt_frag_refcount)) {
-               pgtable_pte_page_dtor(page);
-               __free_page(page);
+       if (atomic_sub_and_test(PTE_FRAG_NR - count, 
&ptdesc->pt_frag_refcount)) {
+               pagetable_pte_dtor(ptdesc);
+               pagetable_free(ptdesc);
        }
 }
 
@@ -55,25 +55,25 @@ static pte_t *get_pte_from_cache(struct mm_struct *mm)
 static pte_t *__alloc_for_ptecache(struct mm_struct *mm, int kernel)
 {
        void *ret = NULL;
-       struct page *page;
+       struct ptdesc *ptdesc;
 
        if (!kernel) {
-               page = alloc_page(PGALLOC_GFP | __GFP_ACCOUNT);
-               if (!page)
+               ptdesc = pagetable_alloc(PGALLOC_GFP | __GFP_ACCOUNT, 0);
+               if (!ptdesc)
                        return NULL;
-               if (!pgtable_pte_page_ctor(page)) {
-                       __free_page(page);
+               if (!pagetable_pte_ctor(ptdesc)) {
+                       pagetable_free(ptdesc);
                        return NULL;
                }
        } else {
-               page = alloc_page(PGALLOC_GFP);
-               if (!page)
+               ptdesc = pagetable_alloc(PGALLOC_GFP, 0);
+               if (!ptdesc)
                        return NULL;
        }
 
-       atomic_set(&page->pt_frag_refcount, 1);
+       atomic_set(&ptdesc->pt_frag_refcount, 1);
 
-       ret = page_address(page);
+       ret = ptdesc_address(ptdesc);
        /*
         * if we support only one fragment just return the
         * allocated page.
@@ -82,12 +82,12 @@ static pte_t *__alloc_for_ptecache(struct mm_struct *mm, 
int kernel)
                return ret;
        spin_lock(&mm->page_table_lock);
        /*
-        * If we find pgtable_page set, we return
+        * If we find ptdesc_page set, we return
         * the allocated page with single fragment
         * count.
         */
        if (likely(!pte_frag_get(&mm->context))) {
-               atomic_set(&page->pt_frag_refcount, PTE_FRAG_NR);
+               atomic_set(&ptdesc->pt_frag_refcount, PTE_FRAG_NR);
                pte_frag_set(&mm->context, ret + PTE_FRAG_SIZE);
        }
        spin_unlock(&mm->page_table_lock);
@@ -108,28 +108,28 @@ pte_t *pte_fragment_alloc(struct mm_struct *mm, int 
kernel)
 
 static void pte_free_now(struct rcu_head *head)
 {
-       struct page *page;
+       struct ptdesc *ptdesc;
 
-       page = container_of(head, struct page, rcu_head);
-       pgtable_pte_page_dtor(page);
-       __free_page(page);
+       ptdesc = container_of(head, struct ptdesc, pt_rcu_head);
+       pagetable_pte_dtor(ptdesc);
+       pagetable_free(ptdesc);
 }
 
 void pte_fragment_free(unsigned long *table, int kernel)
 {
-       struct page *page = virt_to_page(table);
+       struct ptdesc *ptdesc = virt_to_ptdesc(table);
 
-       if (PageReserved(page))
-               return free_reserved_page(page);
+       if (pagetable_is_reserved(ptdesc))
+               return free_reserved_ptdesc(ptdesc);
 
-       BUG_ON(atomic_read(&page->pt_frag_refcount) <= 0);
-       if (atomic_dec_and_test(&page->pt_frag_refcount)) {
+       BUG_ON(atomic_read(&ptdesc->pt_frag_refcount) <= 0);
+       if (atomic_dec_and_test(&ptdesc->pt_frag_refcount)) {
                if (kernel)
-                       __free_page(page);
-               else if (TestClearPageActive(page))
-                       call_rcu(&page->rcu_head, pte_free_now);
+                       pagetable_free(ptdesc);
+               else if (folio_test_clear_active(ptdesc_folio(ptdesc)))
+                       call_rcu(&ptdesc->pt_rcu_head, pte_free_now);
                else
-                       pte_free_now(&page->rcu_head);
+                       pte_free_now(&ptdesc->pt_rcu_head);
        }
 }
 
-- 
2.40.1