[PATCH mm-unstable v8 12/31] powerpc: Convert various functions to use ptdescs
Vishal Moola (Oracle)
vishal.moola at gmail.com
Tue Aug 1 03:03:13 AEST 2023
In order to split struct ptdesc from struct page, convert various
functions to use ptdescs.
Signed-off-by: Vishal Moola (Oracle) <vishal.moola at gmail.com>
Acked-by: Mike Rapoport (IBM) <rppt at kernel.org>
---
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 85c84e89e3ea..1212deeabe15 100644
--- a/arch/powerpc/mm/book3s64/pgtable.c
+++ b/arch/powerpc/mm/book3s64/pgtable.c
@@ -306,22 +306,22 @@ 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.
@@ -331,12 +331,12 @@ 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);
@@ -357,15 +357,15 @@ 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
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