mm: introduce wrappers to access mm->nr_ptes
Let's add wrappers for ->nr_ptes with the same interface as for nr_pmd
and nr_pud.
The patch also makes nr_ptes accounting dependent onto CONFIG_MMU. Page
table accounting doesn't make sense if you don't have page tables.
It's preparation for consolidation of page-table counters in mm_struct.
Link: http://lkml.kernel.org/r/20171006100651.44742-1-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/memory.c b/mm/memory.c
index 6bbd407..6dec21b 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -438,7 +438,7 @@ static void free_pte_range(struct mmu_gather *tlb, pmd_t *pmd,
pgtable_t token = pmd_pgtable(*pmd);
pmd_clear(pmd);
pte_free_tlb(tlb, token, addr);
- atomic_long_dec(&tlb->mm->nr_ptes);
+ mm_dec_nr_ptes(tlb->mm);
}
static inline void free_pmd_range(struct mmu_gather *tlb, pud_t *pud,
@@ -666,7 +666,7 @@ int __pte_alloc(struct mm_struct *mm, pmd_t *pmd, unsigned long address)
ptl = pmd_lock(mm, pmd);
if (likely(pmd_none(*pmd))) { /* Has another populated it ? */
- atomic_long_inc(&mm->nr_ptes);
+ mm_inc_nr_ptes(mm);
pmd_populate(mm, pmd, new);
new = NULL;
}
@@ -3238,7 +3238,7 @@ static int pte_alloc_one_map(struct vm_fault *vmf)
goto map_pte;
}
- atomic_long_inc(&vma->vm_mm->nr_ptes);
+ mm_inc_nr_ptes(vma->vm_mm);
pmd_populate(vma->vm_mm, vmf->pmd, vmf->prealloc_pte);
spin_unlock(vmf->ptl);
vmf->prealloc_pte = NULL;
@@ -3297,7 +3297,7 @@ static void deposit_prealloc_pte(struct vm_fault *vmf)
* We are going to consume the prealloc table,
* count that as nr_ptes.
*/
- atomic_long_inc(&vma->vm_mm->nr_ptes);
+ mm_inc_nr_ptes(vma->vm_mm);
vmf->prealloc_pte = NULL;
}
